Appendix A — Division B
Explanatory Material
A-9.1.1.1.(1) Application of Part 9 to Seasonally and Intermittently Occupied Buildings
The British Columbia Building Code does not provide separate requirements which
would apply to seasonally or intermittently occupied buildings. Without compromising
the basic health and safety provisions, however, various requirements in Part 9
recognize that leniency may be appropriate in some circumstances. With greater use
of “cottages” through the winter months, the proliferation of seasonally
occupied multiple-dwelling buildings and the increasing installation of modern
conveniences in these buildings, the number and extent of possible exceptions is
reduced.
Energy Efficiency Clause 9.36.1.3.(5)(b) exempts seasonally occupied residential
buildings such as summer cottages from the requirements of Section 9.36.
Cottages intended for continuous or regular winter use such as ski cabins are
required to conform to Section 9.36.
Thermal Insulation
Article 9.25.2.1. specifies that insulation is to be installed in walls, ceilings and floors that separate heated space from
unheated space. Cottages intended for use only in the summer and which,
therefore, have no space heating appliances, would not be required to be
insulated. Should a heating system be installed at some later date, insulation
should also be installed at that time in accordance with Article 9.25.1.1. and the insulation tables in Section 9.36. However, if the building were not intended for continuous or
regular winter use, it may still be exempted from the remainder of the energy
efficiency requirements in Section 9.36.
Air Barrier Systems and Vapour Barriers
Articles 9.25.3.1. and 9.25.4.1. require the installation of air barrier systems and vapour barriers only where insulation is installed. Dwellings with no heating
system would thus be exempt from these requirements. In some cases, seasonally
occupied buildings that are conditioned may be required to conform to the air
and vapour barrier requirements of Section 9.25, but not to the air barrier and
other requirements of Section 9.36.
Interior Wall and Ceiling Finishes
The choice of interior wall and ceiling finishes has implications for fire
safety. Where a dwelling is a detached building, there are no fire resistance
requirements for the walls or ceilings within the dwelling. The exposed surfaces
of walls and ceilings are required to have a flame-spread rating not greater
than 150 (Subsection 9.10.17.). There is, therefore, considerable flexibility,
even in continuously occupied dwellings, with respect to the materials used to
finish these walls. Except where waterproof finishes are required (Subsection 9.29.2.), ceilings and walls may be left unfinished. Where
two units adjoin, however, additional fire resistance requirements may apply to
interior loadbearing walls, floors and the shared wall (Article 9.10.8.3., and Subsections 9.10.9. and 9.10.11.).
Plumbing and Electrical Facilities
Plumbing fixtures are required only where a piped water supply is available
(Subsection 9.31.4.), and electrical facilities only where electrical services are available
(Article 9.34.1.2.).
A-9.3.2.1.(1) Grade Marking of Lumber
Lumber is generally grouped for marketing into the species combinations contained
in Table A-9.3.2.1.(1)A. The maximum allowable spans for those combinations are listed in the span tables for joists, rafters and beams. Some species of lumber are also marketed individually.
Since the allowable span for the northern species combination is based on the weakest
species in the combination, the use of the span for this combination is permitted
for any individual species not included in the Spruce-Pine-Fir, Douglas Fir-Larch
and Hemlock-Fir combinations.
Facsimiles of typical grade marks of lumber associations and grading agencies accredited
by the Canadian Lumber Standards (CLS) Accreditation Board to grade mark lumber in
Canada are shown in Table A-9.3.2.1.(1)B. Accreditation by the CLS Accreditation Board applies to the inspection, grading and grade marking of lumber, including mill supervisory service, in accordance with
CSA O141, “Softwood Lumber.”
The grade mark of a CLS accredited agency on a piece of lumber indicates its assigned
grade, species or species combination, moisture condition at the time of surfacing,
the responsible grader or mill of origin and the CLS accredited agency under whose
supervision the grading and marking was done.
| Table A-9.3.2.1.(1)A Species Designations and Abbreviations Forming part of Appendix Note A-9.3.2.1.(1) | ||
| Commercial Designation of Species or Species Combination | Abbreviation Permitted on Grade Stamps | Species Included |
| Douglas Fir – Larch | D Fir – L (N) | Douglas Fir, Western Larch |
| Hemlock – Fir | Hem – Fir (N) | Western Hemlock, Amabilis Fir |
| Spruce – Pine – Fir | S – P – F or Spruce – Pine – Fir |
White Spruce, Engelmann Spruce, Black Spruce, Red Spruce, Lodgepole Pine, Jack Pine, Alpine Fir, Balsam Fir |
| Northern Species | North Species | Any Canadian softwood covered by NLGA 2010, “Standard Grading Rules for Canadian Lumber” |
Canadian lumber is graded to the NLGA 2010, “Standard Grading Rules for Canadian Lumber,” published by the National Lumber Grades Authority. The NLGA rules specify standard grade names and grade name abbreviations for use in grade marks to provide positive
identification of lumber grades. In a similar fashion, standard species names or standard
species abbreviations, symbols or marks are provided in the rules for use in grade
marks.
NLGA 2010, “Standard Grading Rules for Canadian Lumber,” published by the National Lumber Grades Authority. The NLGA rules specify standard grade names and grade name abbreviations for use in grade marks to provide positive
identification of lumber grades. In a similar fashion, standard species names or standard
species abbreviations, symbols or marks are provided in the rules for use in grade
marks.
Grade marks denote the moisture content of lumber at the time of surfacing. “S-Dry”
in the mark indicates the lumber was surfaced at a moisture content not exceeding
19%. “MC 15” indicates a moisture content not exceeding 15%. “S-GRN” in the grade
mark signifies that the lumber was surfaced at a moisture content higher than 19%
at a size to allow for natural shrinkage during seasoning.
Each mill or grader is assigned a permanent number. The point of origin of lumber
is identified in the grade mark by use of a mill or grader number or by the mill name
or abbreviation. The CLS certified agency under whose supervision the lumber was grade
marked is identified in the mark by the registered symbol of the agency.
| Table A-9.3.2.1.(1)B Facsimiles of Grade Marks Used by Canadian Lumber Manufacturing Associations and Agencies Authorized to Grade Mark Lumber in Canada Forming part of Appendix Note A-9.3.2.1.(1) | |
|
Facsimiles of Grade Mark |
Association or Agency |
 |
Alberta Forest Products
Association |
 |
Canadian Mill Services
Association |
 |
Canadian Softwood
Inspection Agency Inc. |
 |
Central Forest Products
Association Inc. |
 |
Council of Forest
Industries |
 |
Macdonald Inspection
Services Ltd. |
 |
Maritime Lumber
Bureau |
 |
Newfoundland &
Labrador Lumber Producers Association |
 |
Northwest Territories
Forest Industries Association |
 |
Ontario Forest Industries
Association Suite
950 |
 |
Ontario Lumber
Manufacturers' Association |
 |
Pacific Lumber
Inspection Bureau |
 |
Quebec Forest Industry
Council |
A-Table 9.3.2.1. Lumber Grading
To identify board grades, the paragraph number of the NLGA rules under which the lumber
is graded must be shown in the grade mark. Paragraph 113 is equivalent to WWPA rules
and paragraph 114 is equivalent to WCLIB rules. When graded in accordance with WWPA
or WCLIB rules, the grade mark will not contain a paragraph number.
A-9.3.2.8.(1) Non-Standard Lumber
NLGA 2010, “Standard Grading Rules for Canadian Lumber,” permits lumber to be dressed to sizes below the standard sizes (38 × 89, 38
× 140, 38 × 184, etc.) provided the grade stamp shows the reduced size.
This Sentence permits the use of the span tables for such lumber, provided the size
indicated on the stamp is not less than 95% of the corresponding standard size.
Allowable spans in the tables must be reduced a full 5% even if the undersize is
less than the 5% permitted.
A-9.3.2.9.(1) Protection from Termites
Figure A-9.3.2.9.(1)-A
Known termite locations
Notes to Figure A-9.3.2.9.(1)-A:
Figure A-9.3.2.9.(1)-B
Clearances under structural wood elements and visibility of supporting elements
where required to permit inspection for termite infestation
A-9.3.2.9.(3) Protection of Structural Wood Elements from Moisture and Decay
There are many above-ground,
structural wood systems where precipitation is readily trapped or
drying is slow, creating conditions conducive to decay. Beams extending
beyond roof decks, junctions between deck members, and connections
between balcony guards and walls are three examples of elements that
can accumulate water when exposed to precipitation if they are not
detailed to allow drainage.
A-9.3.2.9.(4) Protection of Retaining Walls and Cribbing from Decay
Retaining walls supporting soil are considered to be structural elements of the
building if a line drawn from the outer edge of the footing to the bottom of the
exposed face of the retaining wall is greater than 45° to the horizontal. Retaining
walls supporting soil may be structural elements of the building if the line
described above has a lower slope.
Figure A-9.3.2.9.(4)
Identifying retaining walls that require preservative treatment
Retaining walls that are not critical to the support of building foundations but
are greater than 1.2 m in height may pose a danger of sudden collapse to persons
adjacent to the wall if the wood is not adequately protected from decay. The height
of the retaining wall or cribbing is measured as the vertical difference between the
ground levels on each side of the wall.
A-9.4.1.1. Structural Design
Article 9.4.1.1. establishes the principle that the structural members of Part 9 buildings must
- comply with the prescriptive requirements provided in Part 9,
- be designed in accordance with accepted good practice, or
- be designed in accordance with Part 4 using the loads and limits on deflection and vibration specified in Part 9 or Part 4.
Usually a combination of approaches is used. For example, even
if the snow load calculation on a wood roof truss is based on Subsections 9.4.2., the joints must be designed
in accordance with Part 4. Wall framing may comply with the prescriptive
requirements in Subsections 9.23.3., 9.23.10., 9.23.11. and 9.23.12., while the floor framing may be engineered.
Design according to Part 4 or accepted good engineering practice,
such as that described in CWC 2009, “Engineering Guide for Wood Frame Construction,” requires engineering expertise. The CWC Guide contains alternative solutions and provides information on the applicability of the Part
9 prescriptive structural requirements to further assist designers
and building officials to identify the appropriate design approach.
The need for professional involvement in the structural design of
a building, whether to Part 4 or Part 9 requirements or accepted good
practice, is defined by provincial and territorial legislation.
A-9.4.2.2. Application of Simplified Part 9 Snow LoadsThe simplified specified snow loads described in Article 9.4.2.2. may be used where the structure is of the configuration that is typical of traditional wood-frame residential construction and its performance. This places limits on the
spacing of joists, rafters and trusses, the spans of these members and supporting
members, deflection under load, overall dimensions of the roof and the configuration
of the roof. It assumes considerable redundancy in the structure.
Because very large buildings may be constructed under Part 9 by constructing firewalls
to break up the building area, it is possible to have Part 9 buildings with very large
roofs. The simplified specified snow loads may not be used when the total roof area
of the overall structure exceeds 4 550 m2. Thus, the simplified specified snow load calculation may be used for typical townhouse
construction but would not be appropriate for much larger commercial or industrial
buildings, for example.
The simplified specified snow loads are also not designed to take into account roof
configurations that seriously exacerbate snow accumulation. This does not pertain
to typical projections above a sloped roof, such as dormers, nor does it pertain to
buildings with higher and lower roofs. Although two-level roofs generally lead to
drift loading, smaller light-frame buildings constructed according to Part 9 have
not failed under these loads. Consequently, the simplified calculation may be used
in these cases. Rather, this limitation on application of the simplified calculation
pertains to roofs with high parapets or significant other projections above the roof,
such as elevator penthouses, mechanical rooms or larger equipment that would effectively
collect snow and preclude its blowing off the roof.
The reference to Article 9.4.3.1. invokes, for roof assemblies other than common lumber trusses, the same performance criteria for deflection.
The unit weight of snow on roofs, γ, obtained from measurements at a number of weather
stations across Canada varied from about 1.0 to 4.5 kN/m3. An average value for use in design in lieu of better local data is γ = 3.0 kN/m3. In some locations the unit weight of snow may be considerably greater than 3.0 kN/m3. Such locations include regions where the maximum snow load on the roof is reached
only after contributions from many snowstorms, coastal regions, and regions where
winter rains are considerable and where a unit weight as high as 4.0 kN/m3 may be appropriate.
A-9.4.2.3.(1) Accessible Platforms Subject to Snow and Occupancy Loads
Many platforms are subject
to both occupancy loads and snow loads. These include balconies, decks,
verandas, flat roofs over garages and carports. Where such a platform,
or a segregated area of such a platform, serves a single dwelling
unit, it must be designed for the greater of either the specified
snow load or an occupancy load of 1.9 kPa. Where the
platform serves more than one single dwelling unit or an occupancy
other than a residential occupancy, higher occupancy loads will apply
as specified in Table 4.1.5.3.
A-9.4.2.4.(1) Specified Loads for Attics or Roof Spaces with Limited Accessibility
Typical residential
roofs are framed with roof trusses and the ceiling is insulated.
Residential trusses are placed at 600 mm on centre
with web members joining top and bottom chords. Lateral web bracing
is installed perpendicular to the span of the trusses. As a result,
there is limited room for movement inside the attic or roof space
or for storage of material. Access hatches are generally built to
the minimum acceptable dimensions, further limiting the size of material
that can be moved into the attic or roof space.
With exposed insulation in the attic or roof space, access is
not recommended unless protective clothing and breathing apparatus
are worn.
Thus the attic or roof space is recognized as uninhabitable
and loading can be based on actual dead load. In emergency situations
or for the purpose of inspection, it is possible for a person to access
the attic or roof space without over-stressing the truss or causing
damaging deflections.
A-Table 9.4.4.1. Classification of Soils
Sand or gravel may be classified by means of a picket test
in which a 38 mm by 38 mm picket bevelled
at the end at 45° to a point is pushed into the soil.
Such material is classified as “dense or compact” if a man of average
weight cannot push the picket more than 200 mm into the
soil and “loose” if the picket penetrates 200 mm or more.
Clay and silt may be classified as “stiff” if it is difficult
to indent by thumb pressure, “firm” if it can be indented by moderate
thumb pressure, “soft” if it can be easily penetrated by thumb pressure,
where this test is carried out on undisturbed soil in the wall of
a test pit.
A-9.4.4.4.(1) Soil Movement
In susceptible soils, changes in temperature or moisture content can cause
significant expansion and contraction. Soils containing pyrites can expand simply
on
exposure to air.
Expansion and Contraction due to Moisture
Clay soils are most prone to expansion and contraction due to moisture.
Particularly wet seasons can sufficiently increase the volume of the soil under and
around the structure to cause heaving of foundations and floors-on-ground, or
cracking of foundation walls. Particularly dry seasons or draw-down of water by
fast-growing trees can decrease the volume of the soil supporting foundations and
floors-on-ground, thus causing settling.
Frost Heave
Frost heave is probably the most commonly recognized phenomenon related to
freezing soil. Frost heave results when moisture in frost-susceptible soil (clay and
silt) under the footings freezes and expands. This mechanism is addressed by
requirements in Section 9.12. regarding the depth of
excavations.
Ice Lenses
When moisture in frost-susceptible soils freezes, it forms an ice lens and reduces
the vapour pressure in the soil in the area immediately around the lens. Moisture
in
the ground redistributes to rebalance the vapour pressures providing more moisture
in the area of the ice lens. This moisture freezes to the lens and the cycle repeats
itself. As the ice lens grows, it exerts pressure in the direction of heat flow.
When lenses form close to foundations and heat flow is toward the foundation—as may
be the case with unheated crawl spaces or open concrete block foundations insulated
on the interior—the forces may be sufficient to crack the foundation.
Adfreezing
Ice lenses can adhere themselves to cold foundations. Where heat flow is
essentially upward, parallel to the foundation, the pressures exerted will tend to
lift the foundation. This may cause differential movement or cracking of the
foundation. Heat loss through basement foundations of cast-in-place concrete or
concrete block insulated on the exterior appears to be sufficient to prevent
adfreezing. Care must be taken where the foundation does not enclose heated space
or
where open block foundations are insulated on the interior. The installation of
semi-rigid glass fibre insulation has demonstrated some effectiveness as a
separation layer to absorb the adfreezing forces.
Pyrites
Pyrite is the most common iron disulphide mineral in rock and has been identified
in rock of all types and ages. It is most commonly found in metamorphic and
sedimentary rock, and especially in coal and shale deposits.
Weathering of pyritic shale is a chemical-microbiological oxidation process that
results in volume increases that can heave foundations and floors-on-ground.
Concentrations of as little as 0.1% by weight have caused heaving. Weathering can
be
initiated simply by exposing the pyritic material to air. Thus, building on soils
that contain pyrites in concentrations that will cause damage to the building should
be avoided, or measures should be taken to remove the material or seal it. Material
containing pyrites should not be used for backfill at foundations or for supporting
foundations or floors-on-ground.
Where it is not known if the soil or backfill contains pyritic material in a
deleterious concentration, a test is available to identify its presence and concentration.
References:
Legget, R.F. and Crawford, C.B. Trees and Buildings. Canadian
Building Digest 62, Division of Building Research, National Research
Council Canada, Ottawa, 1965.
Hamilton, J.J. Swelling and Shrinking Subsoils. Canadian Building
Digest 84, Division of Building Research, National Research Council
Canada, Ottawa, 1966.
Hamilton, J.J. Foundations on Swelling and Shrinking Subsoils.
Canadian Building Digest 184, Division of Building Research, National
Research Council Canada, Ottawa, 1977.
Penner, W., Eden, W.J., and Gratten-Bellew, P.E. Expansion of
Pyritic Shales. Canadian Building Digest 152, Division of Building
Research, National Research Council Canada, Ottawa, 1975.
Swinton, M.C., Brown, W.C., and Chown, G.A. Controlling the
Transfer of Heat, Air and Moisture through the Building Envelope. Small
Buildings - Technology in Transition, Building Science Insight '90,
Institute for Research in Construction, National Research Council
Canada, Ottawa, 1990.
A-9.4.4.6. and 9.15.1.1. Loads on Foundations
The prescriptive solutions provided in Part 9 relating to footings
and foundation walls only account for the loads imposed by drained
earth. Drained earth is assumed to exert a load equivalent to the
load that would be exerted by a fluid with a density of 480
kg/m3. The prescriptive solutions do not account
for surcharges from saturated soil or additional loads from heavy
objects located adjacent to the building. Where such surcharges are
expected, the footings and foundation walls must be designed and constructed
according to Part 4.
A-9.5.1.2. Combination Rooms
If
a room draws natural light and natural ventilation from another area,
the opening between the two areas must be large enough to effectively
provide sufficient light and air. This is why a minimum opening of 3 m2 is required, or the equivalent of a set
of double doors. The effectiveness of the transfer of light and air
also depends on the size of the transfer opening in relation to the
size of the dependent room; in measuring the area of the wall separating
the two areas, the whole wall on the side of the dependent room should
be considered, not taking into account offsets that may be in the
surface of the wall.
The opening does not necessarily have to be in the form of a
doorway; it may be an opening at eye level. However, if the dependent
area is a bedroom, provision must be made for the escape window required
by Article 9.9.10.1. to fulfill its safety function. This is why a direct passage is required between the bedroom and the other
area; the equivalent of at least a doorway is therefore required for
direct passage between the two areas.
A-9.5.5.3. Doorways to Rooms with a Bathtub, Shower or Water Closet
If the minimum 860 mm hallway serves more than one room with
identical facilities, only one of the rooms is required to have a door not less than
760 mm wide.
If a number of rooms have different facilities, for example, one room has a
shower, lavatory and water closet, and another room has a lavatory and water closet,
the room with the shower, lavatory and water closet must have the minimum 760
mm wide door. Where multiple rooms provide the same or similar
facilities, one of these rooms must comply with the requirement to have at least one
bathtub or shower, one lavatory and one water closet. Where the fixtures are located
in two separate rooms served by the same hallway, the requirement for the minimum
doorway width would apply to both rooms.
If the minimum 860 mm hallway does not serve any room containing a
bathtub, shower and water closet, additional fixtures do not need to be
installed.
A-9.6.1.1.(1) ApplicationThe scope of this Section includes glass installed on the interior or on the exterior
of a building.
A-9.6.1.2.(2) Mirrored Glass Doors
CAN/CGSB-82.6-M covers mirrored glass doors for use on reach-in closets. It specifies that
such doors are not to be used for walk-in closets.
A-9.6.1.3.(1) BC Deleted
A-Table 9.6.1.3. Glass in Doors
Maximum areas in Table 9.6.1.3. for other than fully tempered glazing are cut off at 1.50 m2, as this would be the practical limit after which safety glass would
be required by Sentence 9.6.1.4.(2).
A-9.7. Windows, Doors and SkylightsThis section applies only to windows, doors and skylights as defined in the scope
of the standards referenced in Article 9.7.4.2. Other glazed products, such as site-built windows, curtain walls or sloped glazing, are required to conform to Part 5.
It is also permitted for fenestration products within the scope of the NAFS standard
to conform to Part 5. This option is typically used for windows and doors that are impractical to subject to the testing requirements of NAFS due to their size or for custom configurations.
A-9.7.3.2.(1)(a) Minimizing Condensation
The total prevention of condensation on the surfaces of fenestration products is difficult
to achieve and, depending on the design and construction of the window or door, may
not be absolutely necessary. Clause 9.7.3.2.(1)(a) therefore requires that condensation be minimized, which means that the amount of moisture that condenses on the inside surface of a window, door or skylight, and the
frequency at which this occurs, must be limited. The occurrence of such condensation
must be sufficiently rare, the accumulation of any water must be sufficiently small,
and drying must be sufficiently rapid to prevent the deterioration of moisture-susceptible
materials and the growth of fungi.
A-9.7.4. Design and ConstructionGarage doors, sloped glazing, curtain walls, storefronts, commercial entrance systems,
site-built or site-glazed products, revolving doors, interior windows and doors, storm
windows, storm doors, sunrooms and commercial steel doors are not in the scope of
NAFS.
All windows, doors and skylights installed to separate conditioned space from unconditioned
space or the exterior must also conform to Section 9.36.
A-9.7.4.2.(1) Standards Referenced for Windows, Doors and Skylights
General Doors between an unconditioned garage and a dwelling unit are considered to be in
scope of the standard referenced in this Sentence. Although the standard refers to
windows in “exterior building envelopes”, a note to the definition of “building envelope”
clarifies that for the purpose of application of the standard, in some cases a building
envelope may consist of 2 separate walls (such as a wall between garage and dwelling
unit as well as the exterior wall of the garage itself).
A door leading to the exterior from an unconditioned garage is also within scope of
the referenced standard, as it is also part of the exterior building envelope. However,
because the scope of the BC Building Code takes precedence, these doors are not required
to conform to “NAFS”. This Subsection of the Code does not apply to a door separating
two unconditioned spaces.
Canadian Requirements in the Harmonized Standard
In addition to referencing the Canadian Supplement, CSA A440S1, “Canadian Supplement to AAMA/WDMA/CSA 101/I.S.2/A440, NAFS – North American Fenestration Standard/Specification for Windows, Doors, and Skylights,” the Harmonized Standard, AAMA/WDMA/CSA 101/I.S.2/A440, “NAFS – North American Fenestration Standard/Specification for Windows, Doors, and Skylights,” contains some Canada-specific test criteria.
Standards Referenced for Excluded Products
Clause 1.1, General, of the Harmonized Standard defines the limits to the application
of the standard with respect to various types of fenestration products. A list of
exceptions to the application statement identifies a number of standards that apply
to excluded products. Compliance with those standards is not required by the Code;
the references are provided for information purposes only.
Label Indicating Performance and Compliance with Standard
The Canadian Supplement requires that a product’s performance ratings be indicated
on a label according to the designation requirements in the Harmonized Standard and
that the label include
- design pressure, where applicable,
- negative design pressure, where applicable,
- water penetration test pressure, and
- the Canadian air infiltration and exfiltration levels.
It should be noted that, for a product to carry a label in Canada, it must meet all
of the applicable requirements of both the Harmonized Standard and the Canadian Supplement,
including the forced entry requirements.
Water Penetration Resistance For the various performance grades listed in the Harmonized Standard, the corresponding
water penetration resistance test pressures are a percentage of the design pressure.
For R class products, water penetration resistance test pressures are 15% of design
pressure. In Canada, driving rain wind pressures (DRWP) have been determined for the
locations listed in Appendix C of the Code. These are listed in the Canadian Supplement.
The DRWP given in the Canadian Supplement must be used for all products covered in
the scope of the Harmonized Standard when used in buildings within the scope of Part
9.
To achieve equivalent levels of water penetration resistance for all locations, the
Canadian Supplement includes a provision for calculating specified DRWP at the building
site considering building exposure. Specified DRWP values are, in some cases, greater
than 15% of design pressure and, in other cases, less than 15% of design pressure.
For a fenestration product to comply with the Code, it must be able to resist the
structural and water penetration loads at the building site. Reliance on a percentage
of design pressure for water penetration resistance in the selection of an acceptable
fenestration product will not always be adequate. Design pressure values are reported
on a secondary designator, which is required by the Canadian Supplement to be affixed
to the window.
As an alternative to the above noted provision in the Canadian Supplement for calculating
specified DRWP, the Water Resistance values listed in Table C-4 of Appendix C may be used.
Uniform Load Structural Test
The Harmonized Standard specifies that fenestration products be tested at 150% of
design pressure for wind (specified wind load) and that skylights and roof windows
be tested at 200% of design pressure for snow (specified snow load). With the change
in the NBC 2005 to a 1-in-50 return period for wind load, a factor of 1.4 rather than
1.5 is now applied for wind. The NBC has traditionally applied a factor of 1.5 rather
than 2.0 for snow. Incorporating these lower load factors into the Code requirements
for fenestration would better reflect acceptable minimum performance levels; however,
this has not been done in order to avoid adding complexity to the Code, to recognize
the benefits of Canada-US harmonization, and to recognize that differentiation of
products that meet the Canadian versus the US requirements would add complexity for
manufacturers, designers, specifiers and regulatory officials.
The required design pressure and Performance Grade (PG) rating of doors and windows
has been listed for each of the geographic locations found in the Code in Table C-4. These may be used as an alternative to the specified wind load calculations in the
Canadian Supplement.
Condensation Resistance
The Harmonized Standard identifies three test procedures that can be used to determine the condensation resistance of windows and doors. Only the physical test procedure
given in CSA A440.2, can be used to establish Temperature Index (I) values. Computer simulation tools can also be used to estimate the relative condensation resistance of windows, but
these methods employ different expressions of performance known as Condensation Resistance
Factors (CR). I and CR values are not interchangeable.Where removable multiple glazing panels (RMGP) are installed on the inside of a window,
care should be taken to hermetically seal the RMGP against the leakage of moisture-laden
air from the interior into the cavity on the exterior of the RMGP because the moisture
transported by the air could lead to significant condensation on the interior surface
of the outside glazing.
Basement Windows
Clause 8.4.2, Basement Windows, of the Harmonized Standard refers to products that
are intended to meet Code requirements for ventilation and emergency egress. The minimum
test size of 800 mm x 360 mm (total area of 0.288 m2) specified in the standard will not provide the minimum openable area required by
the Code for bedrooms (i.e. 0.35 m2 with no dimension less than 380 mm) and the means to provide minimum open area identified
in the standard is inconsistent with the requirements of the Code (see Subsection 9.9.10. for bedroom windows). The minimum test size specified in the standard will also not
provide the minimum ventilation area of 0.28 m2 required for non-heating-season natural ventilation (see Article 9.32.2.2.).
A-9.7.4.3.(2) Performance RequirementsIf the option of calculating design pressure performance grade and water resistance
values using the Canadian Supplement is chosen, the DRWP values in Table A.1 of that
standard must be used for all buildings within the scope of Part 9 of the BC Building Code. This requirement applies whether the windows, doors and skylights are designed to conform to Article 9.7.4.2. or to Part 5.
A-9.7.5.2.(1) Forced Entry Via Glazing in Doors and Sidelights
There is no mandatory requirement that special glass be used in doors or
sidelights, primarily because of cost. It is, however, a common method of forced
entry to break glass in doors and sidelights to gain access to door hardware and
unlock the door from the inside. Although insulated glass provides increased
resistance over single glazing, the highest resistance is provided by laminated
glass. Tempered glass, while stronger against static loads, is prone to shattering
under high, concentrated impact loads.
Figure A-9.7.5.2.(1)
Combined laminated/annealed glazing
Laminated glass is more expensive than annealed glass and must be used in greater
thicknesses. Figure A-9.7.5.2.(1) shows an insulated sidelight made of one pane of laminated glass and one pane of annealed glass. This
method reduces the cost premium that would result if both panes were
laminated.
Consideration should be given to using laminated glazing in doors and accompanying
sidelights regulated by Article 9.6.1.3., in windows located within 900 mm of locks in such doors, and in basement windows.
Underwriters' Laboratories of Canada have produced ULC-S332, “Burglary Resisting Glazing Material,” which provides a test procedure to evaluate the resistance of glazing to attacks by thieves. While it is
principally intended for plate glass show windows, it may be of value for
residential purposes.
A-9.7.5.2.(2) BC Deleted
A-9.7.5.2.(6) Door Fasteners
The
purpose of the requirement for 30 mm screw penetration
into solid wood is to prevent the door from being dislodged from the
jamb due to impact forces. It is not the intent to prohibit other
types of hinges or strikeplates that are specially designed to provide
equal or greater protection.
A-9.7.5.2.(8) Hinged Doors
Methods
of satisfying this Sentence include either using non-removable pin
hinges or modifying standard hinges by screw fastening a metal pin
in a screw hole in one half of the top and bottom hinges. When the
door is closed, the projecting portion of the pin engages in the corresponding
screw hole in the other half of the hinge and then, even if the hinge
pin is taken out, the door cannot be removed.
A-9.7.5.3.(1) Resistance of Windows to Forced Entry
Although this Sentence only applies to windows
within 2 m of adjacent ground level, certain house and
site features, such as balconies or canopy roofs, allow for easy access
to windows at higher elevations. Consideration should be given to
specifying break-in resistant windows in such locations.
This Sentence does not apply to windows that do not serve the
interior of the dwelling unit, such as windows to garages, sun rooms
or greenhouses, provided connections between these spaces and the
dwelling unit are secure.
One method that is often used to improve the resistance of windows
to forced entry is the installation of metal “security bars.” However,
while many such installations are effective in increasing resistance
to forced entry, they may also reduce or eliminate the usefulness
of the window as an exit in case of fire or other emergency that prevents
use of the normal building exits. Indeed, unless such devices are
easily openable from the inside, their installation in some cases
would contravene the requirements of Article 9.9.10.1., which requires every bedroom that does not have an exterior door to
have at least one window that is large enough and easy enough to open
that it can be used as an exit in case of emergency. Thus an acceptable
security bar system should be easy to open from the inside while still
providing increased resistance to entry from the outside.
A-9.8.4. Step Dimensions
The Code distinguishes three principal types of stair treads and uses the
following terminology to describe them: rectangular treads are found in straight-run
flights; angled treads are found in curved flights; winders are a special type of
angled tread described in Appendix Note A-9.8.4.5. See Figure A-9.8.4.-A.
Figure A-9.8.4.-A
Types of treads
Articles 9.8.4.1. to 9.8.4.6. specify various dimensional limits for steps. Figure A-9.8.4.-B illustrates the elements of a step and how these are to be measured.
Figure A-9.8.4.-B
Elements of steps and their measurement
A-9.8.4.5. Winders
Where a stair must turn, the safest method of incorporating the turn is to use a
landing. Within a dwelling unit, however, where occupants are familiar with their
environment, winders are an acceptable method of reducing the amount of floor area
devoted to the stair and have not been shown to be more hazardous than a straight
run of steps. Nevertheless, care is required to ensure that winders are as safe as
possible. Experience has shown that 30° winders are the best compromise
and require the least change in the natural gait of the stair user; 45°
winders are also acceptable, as they are wider. The Code permits only
these two angles. Although it is normal Code practice to specify upper and lower
limits, in this case it is necessary to limit the winders to specific angles with
no
tolerance above or below these angles other than normal construction tolerances. One
result of this requirement is that winder-type turns in stairs are limited to 30°
or
45° (1 winder), 60° (2 winders), or 90° (2 or 3 winders).
See Figure A-9.8.4.5.
Figure A-9.8.4.5.
Winders
A-9.8.4.6. Tread Projection and Leading Edge of Steps
A sloped or bevelled edge on nosings or leading
edges of steps will make the tread more visible through light modeling.
The sloped portion of the leading edge must not be too wide so as
to reduce the risk of slipping of the foot.
A-9.8.6.3.(1) Dimensions of Landings
Figure A-9.8.6.3.(1) illustrates various landing configurations.
Figure A-9.8.6.3.(1)
Landing configurations
A-9.8.7.2. Continuity of Handrails
The guidance and support provided by handrails is particularly important at the
beginning and end of ramps and flights of stairs and at changes in direction such
as
at landings and winders.
The intent of the requirement in Sentence (1) for handrails to be continuous throughout the length of the stair is that the handrail
be continuous from the bottom riser to the top riser of the stair. The required
handrail may start back from the bottom riser only if it is supported by a newel
post installed on the bottom tread. (See Figure A-9.8.7.2.)
For stairs or ramps serving a single dwelling unit, the intent of the requirement
in Sentence (2) for handrails to be continuous throughout the length of the flight is that the handrail be continuous
from the bottom riser to the top riser of the flight. Once again, the required
handrail may start back from the bottom riser only if it is supported by a newel
post installed on this line. (See Figure A-9.8.7.2.) With regard to stairs serving a single dwelling unit, the handrail may terminate at
landings.
In the case of stairs within dwelling units that incorporate winders, the handrail
should be configured so that it will in fact provide guidance and support to the
stair user throughout the turn through the winder.
Figure A-9.8.7.2.
Continuity of handrails at the top and bottom of stairs and flights
A-9.8.7.3.(1) Termination of Handrails
Handrails are required to be installed so as not to obstruct
pedestrian travel. To achieve this end, the rail should not extend
so far into a hallway as to reduce the clear width of the hallway
to less than the required width. Where the stair terminates in a room
or other space, likely paths of travel through that room or space
should be assessed to ensure that any projection of the handrail beyond
the end of the stair will not interfere with pedestrian travel. As
extensions of handrails beyond the first and last riser are not required
in dwelling units (see Sentence 9.8.7.3.(2)) and as occupants of dwellings are generally familiar with their surroundings, the design
of dwellings would not generally be affected by this requirement.
Handrails are also required to terminate in a manner that will
not create a safety hazard to blind or visually impaired persons,
children whose heads may be at the same height as the end of the rail,
or persons wearing loose clothing or carrying items that might catch
on the end of the rail. One approach to reducing potential hazards
is returning the handrail to a wall, floor or post. Again, within
dwelling units, where occupants are generally familiar with their
surroundings, returning the handrail to a wall, floor or post may
not be necessary. For example, where the handrail is fastened to a
wall and does not project past the wall into a hallway or other space,
a reasonable degree of safety is assumed to be provided; other alternatives
may provide an equivalent level of protection.
A-9.8.7.3.(2) Handrail Extensions
As noted in Appendix Note A-9.8.7.2., the guidance and support provided by handrails is particularly important
at the beginning and end of ramps and flights of stairs and at changes
in direction. The extended handrail provides guidance and allows users
to steady themselves upon entering or leaving a ramp or flight of
stairs. Such extensions are particularly useful to visually-impaired
persons, and persons with physical disabilities or who are encumbered
in their use of the stairs or ramp.
A-9.8.7.4. Height of Handrails
Figure A-9.8.7.4.
Measuring handrail heightA-9.8.7.5.(2) Handrail Sections
Handrails are intended to provide guidance and support to stair users. To fulfil
this intent, handrails must be “graspable.” Acceptable handrail sections include,
but are not limited to, those shown below.
Figure A-9.8.7.5.(2)
Handrail sections
A-9.8.7.7. Attachment of Handrails
Handrails are intended to provide guidance and support to the stair
user and to arrest falls. The loads on handrails may therefore be
considerable. The attachment of handrails serving a single dwelling
unit may be accepted on the basis of experience or structural design.
A-9.8.8.1. Required Guards
The requirements relating to guards stated in Part 9 are based on the premise
that, wherever there is a difference in elevation of 600 mm or more
between two floors, or between a floor or other surface to which access is provided
for other than maintenance purposes and the next lower surface, the risk of injury
in a fall from the higher surface is sufficient to warrant the installation of some
kind of barrier to reduce the chances of such a fall. A wall along the edge of the
higher surface will obviously prevent such a fall, provided the wall is sufficiently
strong that a person cannot fall through it. Where there is no wall, a guard must
be
installed. Because guards clearly provide less protection than walls, additional
requirements apply to guards to ensure that a minimum level of protection is
provided. These relate to the characteristics described in A-9.8.8.3., A-9.8.8.5.(1) and (2), A-9.8.8.5.(3) and A-9.8.8.6.(2).
Examples of such surfaces where the difference in elevation could exceed 600
mm and consequently where guards would be required include, but are not
limited to, landings, porches, balconies, mezzanines, galleries, and raised
walkways. Especially in exterior settings, surfaces adjacent to walking surfaces,
stairs or ramps often are not parallel to the walking surface or the surface of the
treads or ramps. Consequently, the walking surface, stair or ramp may need
protection in some locations but not in others. (See Figure A-9.8.8.1.) In some instances, grades are artificially raised close to walking surfaces, stairs
or ramps to avoid installing guards. This provides little or no protection for the
users. That is why the requirements specify differences in elevation not only
immediately adjacent to the construction but also for a distance of 1 200
mm from it by requiring that the slope of the ground be within certain
limits. (See Figure A-9.8.8.1.)
Figure A-9.8.8.1.
Required locations of guards
A-9.8.8.1.(5) Height of Window Sills above Floors or Ground
The primary intent of the requirement is to minimize the likelihood of small
children falling significant heights from open windows. Reflecting reported cases,
the requirement applies only to dwelling units and generally those located on the
second floor or higher of residential or mixed use buildings where the windows are
essentially free-swinging or free-sliding.
Free-swinging or free-sliding means that a window that has been cracked open can
be opened further by simply pushing on the openable part of the window. Care must
be
taken in selecting windows, as some with special operating hardware can still be
opened further by simply pushing on the window.
Casement windows with crank operators would be considered to conform to Clause (5)(b). To provide additional safety, where slightly older children are involved, occupants can easily remove the
crank handles from these windows. Awning windows with scissor hardware, however, may
not keep the window from swinging open once it is unlatched. Hopper windows would
be
affected only if an opening is created at the bottom as well as at the top of the
window. The requirement will impact primarily on the use of sliding windows which
do
not incorporate devices in their construction that can be used to limit the openable
area of the window.
The 100 mm opening limit is consistent with widths of openings that
small children can fall through. It is only invoked, however, where the other
dimension of the opening is more than 380 mm. Again, care must be taken
in selecting a window. At some position, scissor hardware on an awning window may
break up the open area such that there is no unobstructed opening with dimensions
greater than 380 mm and 100 mm. At another position,
however, though the window is not open much more, the hardware may not adequately
break up the opening. The 450 mm height off the floor recognizes that
furniture is often placed under windows and small children are often good
climbers.
A-9.8.8.2. Loads on Guards
Guards must be constructed so as to be strong enough to protect persons from
falling under normal use. Many guards installed in dwelling units or on exterior
stairs serving one or two dwelling units have demonstrated acceptable performance
over time. The loading described in the first row of Table 9.8.8.2. is intended to be consistent with the performance provided by these guards. Examples
of
guard construction presented in the “2006 Building Code Compendium, Volume 2,
Supplementary Standard SB-7, Guards for Housing and Small Buildings” meet the
criteria set in the National Building Code for loads on guards, including the more
stringent requirements of Sentences 9.8.8.2.(1) and (2).
The load on guards within dwelling units, or on exterior guards serving not more
than two dwelling units, is to be imposed over an area of the guard such that, where
standard balusters are used and installed at the maximum 100 mm spacing permitted
for required guards, 3 balusters will be engaged. Where the balusters
are wider, only two may be engaged unless they are spaced closer together. Where the
guard is not required, and balusters are installed more than 100 mm apart, fewer
balusters may be required to carry the imposed load.
A-9.8.8.3. Minimum Heights
Guard
heights are generally based on the waist heights of average persons.
Generally, lower heights are permitted in dwelling units because the
occupants become familiar with the potential hazards, and situations
which lead to pushing and jostling under crowded conditions are less
likely to arise.
A-9.8.8.5.(1) and (2) Risk of Falling through Guards
The risk of falling through a guard is especially
prevalent for children. Therefore the requirements are stringent for
guards in all buildings except industrial buildings, where children
are unlikely to be present except under strict supervision.
A-9.8.8.5.(3) Risk of Children Getting Their Head Stuck between Balusters
The requirements to prevent children falling through guards also serve to provide
adequate protection against this problem. However, guards are often installed where
they are not required by the Code; i.e., in places where the difference in elevation
is less than 600 mm. In these cases, there is no need to require the
openings between balusters to be less than 100 mm. However, there is a
range of openings between 100 mm and 200 mm in which
children can get their head stuck. Therefore, openings in this range are not
permitted except in buildings of industrial occupancy, where children are unlikely
to be present except under strict supervision.
A-9.8.8.6.(2) Horizontal and Vertical Clearances in Guards so as to not Facilitate Climbing
Compliance with Sentence 9.8.8.6.(1) can be achieved by satisfying one of the Clauses in Sentence 9.8.8.6.(2).
Clause 9.8.8.6.(2)(a) allows guards with protrusions that are greater than 450 mm apart horizontally and
vertically as the distance between the protrusions will be great enough to reduce
the likelihood that young children will be able to get a handhold or toehold on the
protrusions and climb the guard.
Figure A-9.8.8.6.(2)-A
Example of minimum horizontal and vertical clearances between protrusions in
guards as described in Clause 9.8.8.6.(2)(a)
Clause 9.8.8.6.(2)(b) allows guards with protrusions that present a horizontal offset of 15 mm or less because
insufficient foot purchase is provided to facilitate climbing.
Figure A-9.8.8.6.(2)-B
Examples of maximum horizontal offset of protrusions in guards as described in
Clause 9.8.8.6.(2)(b)
A guard that complies with Clause 9.8.8.6.(2)(c) is deemed to not facilitate climbing because the spaces created by the protruding elements are too small to provide a toehold.
Figure A-9.8.8.6.(2)-C
Example of a guard with spaces created by the protruding elements that are not
more than 45 mm wide and 20 mm high as described in Clause 9.8.8.6.(2)(c)
A guard with protrusions that comply with Clause 9.8.8.6.(2)(d) is deemed to not facilitate climbing because the slope of the protruding elements is considered too steep to provide adequate footing.
Figure A-9.8.8.6.(2)-D
Example of guard protrusions with a slope greater than 2 in 1 as described in
Clause 9.8.8.6.(2)(d)
A-9.9.4.5.(1) Openings in Exterior Walls of Exits
Figure A-9.9.4.5.(1)
Protection of openings in exterior walls of exits
A-9.9.8.4.(1) Independent and Remote Exits
Subsection 9.9.8. requires that some floor areas
have more than one exit. The intent is to ensure that, if one exit
is made untenable or inaccessible by a fire, one or more other exits
will be available to permit the occupants to escape. However, if the
exits are close together, all exits might be made untenable or inaccessible
by the same fire. Sentence 9.9.8.4.(1) therefore requires at least two of the exits to be located remotely from each other. This
is not a problem in many buildings falling under Part 9. For instance,
apartment buildings usually have exits located at either end of long
corridors. However, in other types of buildings (e.g. dormitory and
college residence buildings) this is often difficult to accomplish
and problems arise in interpreting the meaning of the word “remote.” Article 3.4.2.3. is more specific, generally requiring the distance between exits to be one half the diagonal dimension of the floor area
or at least 9 m. However, it is felt that such criteria
would be too restrictive to impose on the design of all the smaller
buildings which come under Part 9. Nevertheless, the exits should
be placed as far apart as possible and the Part 3 criteria should be used as a target. Designs in which the exits are so close together that they will obviously both become contaminated
in the event of a fire are not acceptable.
A-9.9.10.1.(1) Escape Windows from Bedrooms
Sentence 9.9.10.1.(1) generally requires every bedroom in an unsprinklered suite to have at least one window or door opening to the
outside that is large enough and easy enough to open so that it can be used as an
exit in the event that a fire prevents use of the building’s normal exits. The
minimum unobstructed opening specified for escape windows must be achievable using
only the normal window operating procedure. The escape path must not go through nor
open onto another room, floor or space.
Where a bedroom is located in an unsprinklered suite in a basement, an escape
window or door must be located in the bedroom. It is not sufficient to rely on
egress through other basement space to another escape window or door.
Window Height
The Article does not set a maximum sill height for escape windows; it is therefore
possible to install a window or skylight that satisfies the requirements of the
Article but defeats the Article’s intent by virtue of being so high that it cannot
be reached for exit purposes. It is recommended that the sills of windows intended
for use as emergency exits be not higher than 1.5 m above the floor.
However, it is sometimes difficult to avoid having a higher sill: on skylights and
windows in basement bedrooms for example. In these cases, it is recommended that
access to the window be improved by some means such as built-in furniture installed
below the window.
Figure A-9.9.10.1.(1)
Built-in furniture to improve access to a window
A-9.9.10.1.(2) Bedroom Window Opening Areas and Dimensions
Although the minimum opening dimensions required for height and width are
380 mm, a window opening that is 380 mm by 380
mm would not comply with the minimum area requirements. (See Figure A-9.9.10.1.(2))
Figure A-9.9.10.1.(2)
Window opening areas and dimensions
A-9.9.10.1.(3) Window Opening into a Window WellSentence 9.9.10.1.(3) specifies that there must be a minimum clearance of 760 mm in front of designated escape windows
to allow persons to escape a basement bedroom in an emergency. This specified
minimum clearance is consistent with the minimum required width for means of egress
from a floor area (see Article 9.9.5.5.) and the minimum required width for path of travel on exit stairs (see Article 9.9.6.1.). It is considered the smallest acceptable clearance between the escape window and the
facing wall of the window well that can accommodate persons trying to escape a
bedroom in an emergency given that they are not moving straight through the window
but must move outward and up, and must have sufficient space to change body
orientation.
Once this clearance is provided, no additional clearance is needed for windows
with sliders, casements, or inward-opening awnings. However, for windows with
outward-opening awnings, additional clearance is needed to provide the required
760 mm beyond the outer edge of the sash. (See Figure A-9.9.10.1.(3).)
Depending on the likelihood of snow accumulation in the window well, it could be
difficult — if not impossible — to escape in an emergency. The window well should
be
designed to provide sufficient clear space for a person to get out the window and
then out the well, taking into account potential snow accumulation.
Hopper windows (bottom-hinged operators) should not be used as escape windows in
cases where the occupants would be required to climb over the glass.
Figure A-9.9.10.1.(3)
Windows providing a means of escape that open into a window well
A-9.10.1.4.(1) Commercial Cooking Equipment
Part 6 refers to NFPA 96, “Ventilation Control and Fire Protection of Commercial Cooking Operations,” which in turn references “Commercial Cooking Equipment.” However, the deciding factor as to whether or not NFPA 96 applies is the potential for production of grease-laden vapours and smoke, rather than the type of equipment used. While NFPA 96 does not apply to domestic equipment for normal residential family use, it should apply to domestic equipment used in commercial, industrial, institutional and similar
cooking applications where the potential for the production of smoke and grease-laden
vapours exceeds that for normal residential family use.
A-9.10.3.1. Fire and Sound Resistance of Building Assemblies
The following tables may be used to select building assemblies for compliance with
Article 9.10.3.1. and Subsection 9.11.2.
Tables A-9.10.3.1.A and A-9.10.3.1.B have been developed from information gathered from tests. While a large number of the assemblies listed were tested, the fire-resistance and acoustical ratings for
others were assigned on the basis of extrapolation of information from tests of similar
assemblies. Where there was enough confidence relative to the fire performance of
an assembly, the fire-resistance ratings were assigned relative to the commonly used
minimum ratings of 30 min, 45 min and 1 h, including a designation of “< 30 min” for
assemblies that are known not to meet the minimum 30-minute rating. Where there was
not enough comparative information on an assembly to assign to it a rating with confidence,
its value in the tables has been left blank (hyphen), indicating that its rating remains
to be assessed through another means. Future work is planned to develop much
of this additional information.
These tables are provided only for the convenience of Code users and do not limit
the number of assemblies permitted to those in the tables. Assemblies not listed or
not given a rating in these tables are equally acceptable provided their fire and
sound resistance can be demonstrated to meet the above-noted requirements either on
the basis of test methods referred to in Article 9.10.3.1. and Subsection 9.11.1. or by using the data in Appendix D, Fire-Performance Ratings. It should be noted, however, that Tables A-9.10.3.1.A and A-9.10.3.1.B are not based on the same assumptions as those used in Appendix D. Assemblies in Tables A-9.10.3.1.A and A-9.10.3.1.B are described through their generic descriptions and variants and include details given in the notes to the tables. Assumptions for Appendix D include different construction details that must be followed rigorously for the calculated ratings to be expected. These are two different methods of choosing assemblies that
meet required fire ratings.
Table A-9.10.3.1.B presents fire-resistance and acoustical ratings for floor, ceiling and roof assemblies. The fire-resistance ratings are appropriate for all assemblies conforming to the construction
specifications given in Table A-9.10.3.1.B, including applicable table notes. Acoustical ratings for assemblies decrease with decreasing depth and decreasing separation of the structural members; the values listed
for sound transmission class and impact insulation class are suitable for the minimum
depth of structural members identified in the description, including applicable table
notes, and for structural member spacing of 305 mm o.c., unless other values are explicitly listed for the assembly. Adjustments to the acoustical
ratings to allow for the benefit of deeper or more
widely spaced structural members are given in Table Notes (8) and (9).| Table A-9.10.3.1.A Fire and Sound Resistance of Walls Forming part of Appendix Note A-9.10.3.1. | |||||
| Type of Wall | Wall Number | Description |
Fire-Resistance Rating(1) | ||
| Loadbearing | Non-Loadbearing | ||||
| • Wood Studs |
W1 |
• 38 mm x 89 mm studs spaced 400 mm or 600 mm o.c. • with or without absorptive material • 1 layer of gypsum board on each side |
 |
||
| • Single Row | W1a | W1 with • 89 mm thick absorptive material(4) • 15.9 mm Type X gypsum board(5) | 1 h | 1 h | 36 |
| • Loadbearing or Non- Loadbearing |
W1b | W1 with • 89 mm thick absorptive material(4) • 12.7 mm Type X gypsum board(5) |
45 min |
45 min |
34 |
| W1c | W1 with • 89 mm thick absorptive material(4) • 12.7 mm regular gypsum board(5)(7) | 30 min |
30 min |
32 | |
| W1d | W1 with • no absorptive material • 15.9 mm Type X gypsum board(5) | 1 h | 1 h | 32 | |
| W1e | W1 with • no absorptive material • 12.7 mm Type X gypsum board(5) | 45 min | 45 min | 32 | |
|
W2 |
• 38 mm x 89 mm studs spaced 400 mm or 600 mm o.c. • with or without absorptive material • 2 layers of gypsum board on each side |
 |
|||
| W2a | W2 with • 89 mm thick absorptive material(4) • 15.9 mm Type X gypsum board(5) | 1.5 h | 2 h | 38 | |
| W2b | W2 with • 89 mm thick absorptive material(4) • 12.7 mm Type X gypsum board(5) | 1 h | 1.5 h | 38 | |
| W2c | W2 with • 89 mm thick absorptive material(4) • 12.7 mm regular gypsum board(5) | 45 min | 1 h | 36 | |
| W2d | W2 with • no absorptive material • 15.9 mm Type X gypsum board(5) | 1.5 h | 2 h | 36 | |
| W2e | W2 with • no absorptive material • 12.7 mm Type X gypsum board(5) | 1 h | 1.5 h | 35 | |
| W2f | W2 with • no absorptive material • 12.7 mm regular gypsum board(5) | 45 min | 1 h | 34 | |
|
W3 |
• 38 mm x 89 mm studs spaced 400 mm or 600 mm o.c. • 89 mm thick absorptive material(4) • resilient metal channels on one side spaced 400 mm or 600 mm o.c. • 1 layer of gypsum board on each side |  |
|||
| W3a | W3 with • studs spaced 400 mm o.c. • 15.9 mm Type X gypsum board(5) | 45 min | 1 h | 45 | |
| W3b | W3 with • studs spaced 600 mm o.c. • 15.9 mm Type X gypsum board(5) | 45 min | 1 h | 48 | |
| W3c | W3 with • studs spaced 400 mm or 600 mm o.c. • 12.7 mm Type X gypsum board(5) | 45 min | 45 min | 43 | |
|
W4 |
• 38 mm x 89 mm studs spaced 400 mm or 600 mm o.c. • 89 mm thick absorptive material(4) • resilient metal channels on one side spaced 400 mm or 600 mm o.c. • 2 layers of gypsum board on resilient metal channel side • 1 layer of gypsum board on other side |  |
|||
| W4a | W4 with • studs spaced 400 mm o.c. • 15.9 mm Type X gypsum board(5) | 1 h |
1 h |
51 | |
| W4b | W4 with • studs spaced 600 mm o.c. • 15.9 mm Type X gypsum board(5) | 1 h |
1 h |
54 | |
| W4c | W4 with • studs spaced 400 mm o.c. • 12.7 mm Type X gypsum board(5) |
45 min |
1 h | 49 | |
| W4d | W4 with • studs spaced 600 mm o.c. • 12.7 mm Type X gypsum board(5) |
45 min |
1 h | 53 | |
|
W5 |
• 38 mm x 89 mm studs spaced 400 mm or 600 mm o.c. • 89 mm thick absorptive material(4) • resilient metal channels on one side spaced 400 mm or 600 mm o.c. • 1 layer of gypsum board on resilient metal channel side • 2 layers of gypsum board on other side |  |
|||
| W5a | W5 with • studs spaced 400 mm o.c. • 15.9 mm Type X gypsum board(5) | 45 min | 1 h | 51 | |
| W5b | W5 with • studs spaced 600 mm o.c. • 15.9 mm Type X gypsum board(5) | 45 min | 1 h | 54 | |
| W5c | W5 with • studs spaced 400 mm o.c. • 12.7 mm Type X gypsum board(5) | 45 min | 1 h | 49 | |
| W5d | W5 with • studs spaced 600 mm o.c. • 12.7 mm Type X gypsum board(5) | 45 min | 1 h | 53 | |
|
W6 |
• 38 mm x 89 mm studs spaced 400 mm or 600 mm o.c. • with or without absorptive material • resilient metal channels on one side • 2 layers of gypsum board on each side |
 |
|||
| W6a | W6 with • studs spaced 400 mm or 600 mm o.c. • 89 mm thick absorptive material(4) • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board(5) | 1.5 h | 2 h | 55 | |
| W6b | W6 with • studs spaced 400 mm or 600 mm o.c. • 89 mm thick absorptive material(4) • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board(5) | 1.5 h | 2 h | 58 | |
| W6c | W6 with • studs spaced 400 mm o.c. • 89 mm thick absorptive material(4) • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board(5) | 1 h | 1.5 h | 53 | |
| W6d | W6 with • studs spaced 400 mm o.c. • 89 mm thick absorptive material(4) • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board | 1 h | 1.5 h | 55 | |
| W6e | W6 with • studs spaced 600 mm o.c. • 89 mm thick absorptive material(4) • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board(5) | 1 h | 1.5 h | 55 | |
| W6f | W6 with • studs spaced 600 mm o.c. • 89 mm thick absorptive material(4) • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board(5) | 1 h | 1.5 h | 58 | |
| W6g | W6 with • studs spaced 400 mm or 600 mm o.c. • 89 mm thick absorptive material(4) • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board(5) | 45 min | 1 h | 50 | |
| W6h | W6 with • studs spaced 400 mm or 600 mm o.c. • 89 mm thick absorptive material(4) • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board(5) | 45 min | 1 h | 52 | |
| W6i | W6 with • studs spaced 400 mm or 600 mm o.c. • no absorptive material • resilient metal channels spaced 400 mm or 600 mm o.c. • 15.9 mm Type X gypsum board(5) | 1.5 h | 2 h | 47 | |
| W6j | W6 with • studs spaced 400 mm or 600 mm o.c. • no absorptive material • resilient metal channels spaced 400 mm or 600 mm o.c. • 12.7 mm Type X gypsum board(5) | 1 h | 1.5 h | 46 | |
| • Wood Studs • Two Rows Staggered on 38 mm × 140 mm Plate |
W7 |
• two rows 38 mm x 89 mm studs each spaced 400 mm or 600 mm o.c. staggered on common
38 mm x 140 mm plate • 89 mm thick absorptive material on one side or 65 mm thick on each side(4)• 1 layer of gypsum board on each side |
 |
||
| • Loadbearing or Non- Loadbearing |
W7a | W7 with • 15.9 mm Type X gypsum board(5) | 1 h | 1 h | 47 |
| W7b | W7 with • 12.7 mm Type X gypsum board(5) |
45 min |
45 min |
45 | |
| W7c | W7 with • 12.7 mm regular gypsum board(5)(7) | 30 min |
30 min |
42 | |
|
W8 |
• Two rows 38 mm x 89 mm studs each spaced 400 mm or 600 mm o.c. staggered on common
38 mm x 140 mm plate • 89 mm thick absorptive material on one side or 65 mm thick on each side(4) • 2 layers of gypsum board on one side • 1 layer of gypsum board on other side |  |
|||
| W8a | W8 with • 15.9 mm Type X gypsum board(5) | 1 h | 1.5 h | 52 | |
| W8b | W8 with • 12.7 mm Type X gypsum board(5) | 45 min | 1 h | 50 | |
|
W9 |
• two rows 38 mm x 89 mm studs each spaced 400 mm or 600 mm o.c. staggered on common
38 mm x 140 mm plate • with or without absorptive material • 2 layers of gypsum board on each side |
 |
|||
| W9a | W9 with • 89 mm thick absorptive material on one side or 65 mm thick on each side(4) • 15.9 mm Type X gypsum board(5) | 1.5 h | 2 h | 56 | |
| W9b | W9 with • 89 mm thick absorptive material on one side or 65 mm thick on each side(4) • 12.7 mm Type X gypsum board(5) | 1 h | 1.5 h | 55 | |
| W9c | W9 with • 89 mm thick absorptive material on one side or 65 mm thick on each side(4) • 12.7 mm regular gypsum board(5) | 45 min | 1 h | 53 | |
| W9d | W9 with • no absorptive material • 15.9 mm Type X gypsum board(5) | 1.5 h | 2 h | 48 | |
|
W10 |
• two rows 38 mm x 89 mm studs each spaced 400 mm or 600 mm o.c. staggered on common
38 mm x 140 mm plate • with or without absorptive material • resilient metal channels on one side spaced 400 mm or 600 mm o.c. • 2 layers of gypsum board on each side |
 |
|||
| W10a | W10 with • 89 mm thick absorptive material on one side or 65 mm thick on each side(4) • 15.9 mm Type X gypsum board(5) | 1.5 h | 2 h | 62 | |
| W10b | W10 with • 89 mm thick absorptive material on one side or 65 mm thick on each side(4) • 12.7 mm Type X gypsum board(5) | 1 h | 1.5 h | 60 | |
| W10c | W10 with • no absorptive material • 15.9 mm Type X gypsum board(5) | 1.5 h | 2 h | 50 | |
| W10d | W10 with • no absorptive material • 12.7 mm Type X gypsum board(5) | 1 h | 1.5 h | 48 | |
|
W11 |
• two rows 38 mm x 89 mm studs each spaced 400 mm or 600 mm o.c. staggered on common
38 mm x 140 mm plate • 89 mm thick absorptive material on one side or 65 mm thick on each side(4) • resilient metal channels on one side spaced 400 mm or 600 mm o.c. • 2 layers of gypsum board on resilient channel side • 1 layer of gypsum board on other side |  |
|||
| W11a | W11 with • 15.9 mm Type X gypsum board(5) | 1 h | 1 h | 56 | |
| W11b | W11 with • 12.7 mm Type X gypsum board(5) |
45 min |
1 h | 54 | |
|
W12 |
• two rows 38 mm x 89 mm studs each spaced 400 mm or 600 mm o.c. staggered on common
38 mm x 140 mm plate • 89 mm thick absorptive material on one side or 65 mm thick on each side(4) • resilient metal channels on one side spaced 400 mm or 600 mm o.c. • 1 layer of gypsum board on resilient metal channel side • 2 layers of gypsum board on other side |  |
|||
| W12a | W12 with • 15.9 mm Type X gypsum board(5) | 45 min | 1 h | 56 | |
| W12b | W12 with • 12.7 mm Type X gypsum board(5) | 45 min | 1 h | 54 | |
| • Wood Studs • Two Rows on Separate Plates |
W13 |
• two rows 38 mm x 89 mm studs, each spaced 400 mm or 600 mm o.c. on separate 38 mm
x 89 mm plates set 25 mm apart • with or without absorptive material • 1 layer of gypsum board on each side |
 |
||
| • Loadbearing or Non- Loadbearing |
W13a | W13 with • 89 mm thick absorptive material on each side(4)(8) • 15.9 mm Type X gypsum board(5) | 1 h | 1 h | 57 |
| W13b | W13 with • 89 mm thick absorptive material on each side(4)(8) • 12.7 mm Type X gypsum board(5) |
45 min |
45 min |
57 | |
| W13c | W13 with • 89 mm thick absorptive material on one side only(4)(8) • 15.9 mm Type X gypsum board(5) | 1 h | 1 h | 54 | |
| W13d | W13 with • 89 mm thick absorptive material on one side only(4)(8) • 12.7 mm Type X gypsum board(5) | 45 min | 45 min | 53 | |
| W13e | W13 with • no absorptive material • 15.9 mm Type X gypsum board(5) | 1 h | 1 h | 45 | |
| W13f | W13 with • no absorptive material • 12.7 mm Type X gypsum board(5) | 45 min | 45 min | 45 | |
|
W14 |
• two rows 38 mm x 89 mm studs, each spaced 400 mm or 600 mm o.c. on separate 38 mm
x 89 mm plates set 25 mm apart • with or without absorptive material • 2 layers of gypsum board on one side • 1 layer of gypsum board on other side |
 |
|||
| W14a | W14 with • 89 mm thick absorptive material on each side(4)(8) • 15.9 mm Type X gypsum board(5) | 1 h |
1 h |
61 | |
| W14b | W14 with • 89 mm thick absorptive material on each side(4)(8) • 12.7 mm Type X gypsum board(5) | 45 min | 1 h | 61 | |
| W14c | W14 with • 89 mm thick absorptive material on one side only(4)(8) • 15.9 mm Type X gypsum board(5) | 1 h | 1 h | 57 | |
| W14d | W14 with • 89 mm thick absorptive material on one side only(4)(8) • 12.7 mm Type X gypsum board(5) | 45 min | 1 h | 57 | |
| W14e | W14 with • no absorptive material • 15.9 mm Type X gypsum board(5) | 1 h | 1 h | 51 | |
| W14f | W14 with • no absorptive material • 12.7 mm Type X gypsum board(5) | 45 min | 1 h | 51 | |
|
W15 |
• two rows 38 mm x 89 mm studs, each spaced 400 mm or 600 mm o.c. on separate 38 mm
x 89 mm plates set 25 mm apart • with or without absorptive material • 2 layers of gypsum board on each side |
 |
|||
| W15a | W15 with • 89 mm thick absorptive material on each side(4)(8) • 15.9 mm Type X gypsum board(5) | 1.5 h | 2 h | 66 | |
| W15b | W15 with • 89 mm thick absorptive material on each side(4)(8) • 12.7 mm Type X gypsum board(5) | 1 h | 1.5 h | 65 | |
| W15c | W15 with • 89 mm thick absorptive material on each side(4)(8) • 12.7 mm regular gypsum board(5) | 45 min | 1 h | 61 | |
| W15d | W15 with • 89 mm thick absorptive material on one side only(4)(8) • 15.9 mm Type X gypsum board(5) | 1.5 h | 2 h | 62 | |
| W15e | W15 with • 89 mm thick absorptive material on one side only(4)(8) • 12.7 mm Type X gypsum board(5) | 1 h | 1.5 h | 60 | |
| W15f | W15 with • 89 mm thick absorptive material on one side only(4)(8) • 12.7 mm regular gypsum board(5) | 45 min | 1 h | 57 | |
| W15g | W15 with • no absorptive material • 15.9 mm Type X gypsum board(5) | 1.5 h | 2 h | 56 | |
| W15h | W15 with • no absorptive material • 12.7 mm Type X gypsum board(5) | 1 h | 1.5 h | 55 | |
| W15i | W15 with • no absorptive material • 12.7 mm regular gypsum board(5) | 45 min | 1 h | 51 | |
| • Exterior Wood Studs • Single Row |
EW1 |
• 38 mm x 89 mm studs spaced 400 mm or 600 mm o.c. • 89 mm thick absorptive material(6) • 1 or 2 layers of gypsum board on inside • exterior sheathing and siding |  |
||
| • Loadbearing and Non- Loadbearing |
EW1a | EW1 with • 15.9 mm Type X gypsum board(5)(9) | 1 h | 1 h | n/a |
| EW1b | EW1 with • 12.7 mm Type X gypsum board(5)(9) | 45 min | 45 min | n/a | |
| EW1c | EW1 with • 2 layers of 12.7 mm regular gypsum board(5)(9) | 45 min | 45 min | n/a | |
| • Non-Loadbearing Steel Studs |
S1 |
• 31 mm x 64 mm steel studs spaced 400 mm or 600 mm o.c. • with or without absorptive material • 1 layer of gypsum board on each side |
 |
||
| • 0.46 mm (25 Gauge) | S1a | S1 with • studs spaced 600 mm o.c. • 65 mm thick absorptive material(4) • 15.9 mm Type X gypsum board(5) | – |
45 min |
43 |
| S1b | S1 with • studs spaced 400 mm o.c. • 65 mm thick absorptive material(4) • 15.9 mm Type X gypsum board(5) | – |
45 min |
39 | |
| S1c | S1 with • studs spaced 400 mm or 600 mm o.c. • no absorptive material •15.9 mm Type X gypsum board(5) | – | 45 min | 35 | |
|
S2 |
• 31 mm x 64 mm steel studs spaced 400 mm or 600 mm o.c. • with or without absorptive material • 1 layer of gypsum board on one side • 2 layers of gypsum board on other side |
 |
|||
| S2a | S2 with • studs spaced 600 mm o.c. • 65 mm thick absorptive material(4) • 15.9 mm Type X gypsum board(5) | – | 1 h | 50 | |
| S2b | S2 with • studs spaced 400 mm o.c. • 65 mm thick absorptive material(4) • 15.9 mm Type X gypsum board(5) | – | 1 h | 44 | |
| S2c | S2 with • studs spaced 600 mm o.c. • 65 mm thick absorptive material(4) • 12.7 mm Type X gypsum board(5) | – | 1 h | 50 | |
| S2d | S2 with • studs spaced 400 mm o.c. • 65 mm thick absorptive material(4) • 12.7 mm Type X gypsum board(5) | – | 1 h | 42 | |
| S2e | S2 with • studs spaced 600 mm o.c. • no absorptive material • 15.9 mm Type X gypsum board(5) | – | 1 h | 41 | |
| S2f | S2 with • studs spaced 400 mm o.c. • no absorptive material • 15.9 mm Type X gypsum board(5) | – | 1 h | 37 | |
| S2g | S2 with • studs spaced 600 mm o.c. • no absorptive material • 12.7 mm Type X gypsum board(5) | – | 1 h | 40 | |
| S2h | S2 with • studs spaced 400 mm o.c. • no absorptive material • 12.7 mm Type X gypsum board(5) | – | 1 h | 35 | |
|
S3 |
• 31 mm x 64 mm steel studs spaced 400 mm or 600 mm o.c. • with or without absorptive material • 2 layers of gypsum board on each side |
 |
|||
| S3a | S3 with • studs spaced 600 mm o.c. • 65 mm thick absorptive material(4) • 15.9 mm Type X gypsum board(5) | – | 2 h | 54 | |
| S3b | S3 with • studs spaced 400 mm o.c. • 65 mm thick absorptive material(4) • 15.9 mm Type X gypsum board(5) | – | 2 h | 51 | |
| S3c | S3 with • studs spaced 600 mm o.c. • 65 mm thick absorptive material(4) • 12.7 mm Type X gypsum board(5) | – | 1.5 h | 53 | |
| S3d | S3 with • studs spaced 400 mm o.c. • 65 mm thick absorptive material(4) • 12.7 mm Type X gypsum board(5) | – | 1.5 h | 47 | |
| S3e | S3 with • studs spaced 600 mm o.c. • 65 mm thick absorptive material(4) • 12.7 mm regular gypsum board(5) | – | 1 h | 49 | |
| S3f | S3 with • studs spaced 400 mm o.c. • 65 mm thick absorptive material(4) • 12.7 mm regular gypsum board(5) | – | 1 h | 41 | |
| S3g | S3 with • studs spaced 600 mm o.c. • no absorptive material • 15.9 mm Type X gypsum board(5) | – | 2 h | 45 | |
| S3h | S3 with • studs spaced 400 mm o.c. • no absorptive material • 15.9 mm Type X gypsum board(5) | – | 2 h | 42 | |
| S3i | S3 with • studs spaced 600 mm o.c. • no absorptive material • 12.7 mm Type X gypsum board(5) | – | 1.5 h | 44 | |
| S3j | S3 with • studs spaced 400 mm o.c. • no absorptive material • 12.7 mm Type X gypsum board(5) | – | 1.5 h | 39 | |
| S3k | S3 with • studs spaced 600 mm o.c. • no absorptive material • 12.7 mm regular gypsum board(5) | – | 1 h | 40 | |
| S3l | S3 with • studs spaced 400 mm o.c. • no absorptive material • 12.7 mm regular gypsum board(5) | – | 1 h | 37 | |
|
S4 |
• 31 mm x 92 mm steel studs spaced 400 mm or 600 mm o.c. • with or without absorptive material • 1 layer of gypsum board on each side |
 |
|||
| S4a | S4 with • studs spaced 600 mm o.c. • 89 mm thick absorptive material(4) • 15.9 mm Type X gypsum board(5) | – |
45 min |
48 | |
| S4b | S4 with • studs spaced 400 mm o.c. • 89 mm thick absorptive material(4) • 15.9 mm Type X gypsum board(5) | – |
45 min |
47 | |
| S4c | S4 with • studs spaced 600 mm o.c. • no absorptive material • 15.9 mm Type X gypsum board(5) | – | 45 min | 38 | |
| S4d | S4 with • studs spaced 400 mm o.c. • no absorptive material • 15.9 mm Type X gypsum board(5) | – | 45 min | 38 | |
|
S5 |
• 31 mm x 92 mm steel studs spaced 400 mm or 600 mm o.c. • with or without absorptive material • 1 layer of gypsum board on one side • 2 layers of gypsum board on other side |
 |
|||
| S5a | S5 with • studs spaced 600 mm o.c. • 89 mm thick absorptive material(4) • 15.9 mm Type X gypsum board(5) | – |
1 h |
53 | |
| S5b | S5 with • studs spaced 400 mm o.c. • 89 mm thick absorptive material(4) • 15.9 mm Type X gypsum board(5) | – |
1 h |
52 | |
| S5c | S5 with • studs spaced 600 mm o.c. • 89 mm thick absorptive material(4) • 12.7 mm Type X gypsum board(5) | – |
1 h |
51 | |
| S5d | S5 with • studs spaced 400 mm o.c. • 89 mm thick absorptive material(4) • 12.7 mm Type X gypsum board(5) | – |
1 h |
50 | |
| S5e | S5 with • studs spaced 600 mm o.c. • no absorptive material •15.9 mm Type X gypsum board(5) | – | 1 h | 43 | |
| S5f | S5 with • studs spaced 400 mm o.c. • no absorptive material • 15.9 mm Type X gypsum board(5) | – | 1 h | 42 | |
| S5g | S5 with • studs spaced 600 mm o.c. • no absorptive material • 12.7 mm Type X gypsum board(5) | – | 1 h | 41 | |
| S5h | S5 with • studs spaced 400 mm o.c. • no absorptive material • 12.7 mm Type X gypsum board(5) | – | 1 h | 40 | |
|
S6 |
• 31 mm x 92 mm steel studs spaced 400 mm or 600 mm o.c. • with or without absorptive material • 2 layers of gypsum board on each side |
 |
|||
| S6a | S6 with • studs spaced 600 mm o.c. • 89 mm thick absorptive material(4) • 15.9 mm Type X gypsum board(5) | – | 2 h | 56 | |
| S6b | S6 with • studs spaced 400 mm o.c. • 89 mm thick absorptive material(4) • 15.9 mm Type X gypsum board(5) | – | 2 h | 55 | |
| S6c | S6 with • studs spaced 600 mm o.c. • 89 mm thick absorptive material(4) • 12.7 mm Type X gypsum board(5) | – | 1.5 h | 55 | |
| S6d | S6 with • studs spaced 400 mm o.c. • 89 mm thick absorptive material(4) • 12.7 mm Type X gypsum board(5) | – | 1.5 h | 54 | |
| S6e | S6 with • studs spaced 600 mm o.c. • 89 mm thick absorptive material(4) • 12.7 mm regular gypsum board(5) | – | 1 h | 50 | |
| S6f | S6 with • studs spaced 400 mm o.c. • 89 mm thick absorptive material(4) • 12.7 mm regular gypsum board(5) | – | 1 h | 48 | |
| S6g | S6 with • studs spaced 600 mm o.c. • no absorptive material • 15.9 mm Type X gypsum board(5) | – | 2 h | 47 | |
| S6h | S6 with • studs spaced 400 mm o.c. • no absorptive material • 15.9 mm Type X gypsum board(5) | – | 2 h | 45 | |
| S6i | S6 with • studs spaced 600 mm o.c. • no absorptive material • 12.7 mm Type X gypsum board(5) | – | 1.5 h | 45 | |
| S6j | S6 with • studs spaced 400 mm o.c. • no absorptive material • 12.7 mm Type X gypsum board(5) | – | 1.5 h | 44 | |
| S6k | S6 with • studs spaced 600 mm o.c. • no absorptive material • 12.7 mm regular gypsum board(5) | – | 1 h | 41 | |
| S6l | S6 with • studs spaced 400 mm o.c. • no absorptive material • 12.7 mm regular gypsum board(5) | – | 1 h | 39 | |
|
S7 |
• 31 mm x 152 mm steel studs spaced 400 mm or 600 mm o.c. • with or without absorptive material • 1 layer of gypsum board on each side |
 |
|||
| S7a | S7 with • 150 mm thick absorptive material(4) • 15.9 mm Type X gypsum board(5) | – |
45 min |
51 | |
| S7b | S7 with • no absorptive material • 15.9 mm Type X gypsum board(5) | – | 45 min | 41 | |
|
S8 |
• 31 mm x 152 mm steel studs spaced 400 mm or 600 mm o.c. • with or without absorptive material • 1 layer of gypsum board on one side • 2 layers of gypsum board on other side |
 |
|||
| S8a | S8 with • 150 mm thick absorptive material(4) • 15.9 mm Type X gypsum board(5) | – |
1 h |
55 | |
| S8b | S8 with • 150 mm thick absorptive material(4) • 12.7 mm Type X gypsum board(5) | – |
1 h |
54 | |
| S8c | S8 with • no absorptive material • 15.9 mm Type X gypsum board(5) | – | 1 h | 45 | |
| S8d | S8 with • no absorptive material • 12.7 mm Type X gypsum board(5) | – | 1 h | 44 | |
|
S9 |
• 31 mm x 152 mm steel studs spaced 400 mm or 600 mm o.c. • with or without absorptive material • 2 layers of gypsum board on each side |
 |
|||
| S9a | S9 with • 150 mm thick absorptive material(4) • 15.9 mm Type X gypsum board(5) | – | 2 h | 59 | |
| S9b | S9 with • 150 mm thick absorptive material(4) • 12.7 mm Type X gypsum board(5) | – | 1.5 h | 57 | |
| S9c | S9 with • 150 mm thick absorptive material(4) • 12.7 mm regular gypsum board(5) | – | 1 h | 53 | |
| S9d | S9 with • no absorptive material • 15.9 mm Type X gypsum board(5) | – | 2 h | 49 | |
| S9e | S9 with • no absorptive material • 12.7 mm Type X gypsum board(5) | – | 1.5 h | 47 | |
| S9f | S9 with • no absorptive material • 12.7 mm regular gypsum board(5) | – | 1 h | 43 | |
| • Loadbearing Steel Studs• 0.84 mm to 1.52 mm Thickness |
S10 |
• 41 mm x 92 mm loadbearing steel studs spaced 400 mm or 600 mm o.c.• with or without cross-bracing on one side • with or without absorptive material • 2 layers gypsum board on each side |  |
||
| S10a | S10 with • 89 mm thick absorptive material(4) • 15.9 mm Type X gypsum board(5) | 1 h | – | 38 | |
| S10b | S10 with • 89 mm thick absorptive material(4) • 12.7 mm Type X gypsum board(5) | 45 min [1 h] | – | 38 | |
| S10c | S10 with • 89 mm thick absorptive material(4) • 12.7 mm regular gypsum board(5) | – | – | 36 | |
| S10d | S10 with • no absorptive material • 15.9 mm Type X gypsum board(5) | 1 h | – | 36 | |
| S10e | S10 with • no absorptive material • 12.7 mm Type X gypsum board(5) | 1 h | – | 35 | |
| S10f | S10 with • no absorptive material • 12.7 mm regular gypsum board(5) | – | – | 34 | |
|
|
• 41 mm x 92 mm loadbearing steel studs spaced 400 mm or 600 mm o.c. • with or without cross-bracing on one side • with or without absorptive material • resilient metal channels on one side • 1 layer gypsum board on each side |
 |
|||
| S11a | S11 with • 89 mm thick absorptive material(4) • resilient metal channels spaced at 600 mm o.c. • 15.9 mm Type X gypsum board(5) | – | – | 50 | |
| S11b | S11 with • 89 mm thick absorptive material(4) • resilient metal channels spaced at 400 mm o.c. • 15.9 mm Type X gypsum board(5) | – | – | 47 | |
| S11c | S11 with • no absorptive material • resilient metal channels spaced at 600 mm o.c. • 15.9 mm Type X gypsum board(5) | – | – | 41 | |
| S11d | S11 with • 89 mm thick absorptive material(4) • resilient metal channels spaced at 600 mm o.c. • 12.7 mm Type X gypsum board(5) | – | – | 47 | |
| S11e | S11 with • 89 mm thick absorptive material(4) • resilient metal channels spaced at 400 mm o.c. • 12.7 mm Type X gypsum board(5) | – | – | 45 | |
| S11f | S11 with • no absorptive material(4) • resilient metal channels spaced at 400 mm o.c. • 15.9 mm Type X gypsum board(5) | – | – | 39 | |
| S11g | S11 with • no absorptive material(4) • resilient metal channels spaced at 400 mm o.c. • 12.7 mm Type X gypsum board(5) | – | – | 36 | |
| S11h | S11 with • no absorptive material(4) • resilient metal channels spaced at 600 mm o.c. • 12.7 mm Type X gypsum board(5) | – | – | 38 | |
|
S12 |
• 41 mm x 92 mm loadbearing steel studs spaced 400 mm or 600 mm o.c. • with or without cross-bracing on one side • with or without absorptive material • resilient metal channels on one side • 2 layers gypsum board on resilient channel side • 1 layer gypsum board on other side |
 |
|||
| S12a | S12 with • 89 mm thick absorptive material(4) • resilient metal channels spaced at 600 mm o.c. • 15.9 mm Type X gypsum board(5) | – | – | 54 | |
| S12b | S12 with • no absorptive material • resilient metal channels spaced at 600 mm o.c. • 15.9 mm Type X gypsum board(5) | – | – | 46 | |
| S12c | S12 with • 89 mm thick absorptive material(4) • resilient metal channels spaced at 400 mm o.c. • 15.9 mm Type X gypsum board(5) | – | – | 52 | |
| S12d | S12 with • no absorptive material • resilient metal channels spaced at 400 mm o.c. • 15.9 mm Type X gypsum board(5) | – | – | 43 | |
| S12e | S12 with • 89 mm thick absorptive material(4) • resilient metal channels spaced at 600 mm o.c. • 12.7 mm Type X gypsum board(5) | – | – | 52 | |
| S12f | S12 with • no absorptive material • resilient metal channels spaced at 600 mm o.c. • 12.7 mm Type X gypsum board(5) | – | – | 43 | |
| S12g | S12 with • 89 mm thick absorptive material(4) • resilient metal channels spaced at 400 mm o.c. • 12.7 mm Type X gypsum board(5) | – | – | 50 | |
| S12h | S12 with • no absorptive material • resilient metal channels spaced at 400 mm o.c. • 12.7 mm Type X gypsum board(5) | – | – | 41 | |
S13 | • 41 mm x 92 mm loadbearing steel studs spaced 400 mm or 600 mm o.c. • with or without absorptive material • resilient metal channels on one side spaced at 400 mm o.c. • 2 layers gypsum board on resilient channel side • 1 layer shear membrane and 1 layer gypsum board on other side |
 |
|||
| S13a | S13 with • 89 mm thick absorptive material(4) • 12.7 mm OSB shear membrane • 12.7 mm Type X gypsum board(5) | 30 min | – | 57 | |
|
|
• 41 mm x 92 mm loadbearing steel studs spaced 400 mm or 600 mm o.c. • with or without absorptive material • resilient metal channels on one side • 2 layers gypsum board on each side |
 |
|||
| S14a | S14 with • 89 mm thick absorptive material(4) • resilient metal channels spaced at 600 mm o.c. • 15.9 mm Type X gypsum board(5) | 1 h | – | 60 | |
| S14b | S14 with • 89 mm thick absorptive material(4) • resilient metal channels spaced at 600 mm o.c. • 12.7 mm Type X gypsum board(5) | 45 min [1 h] |
– | 57 | |
| S14c | S14 with • 89 mm thick absorptive material(4) • resilient metal channels spaced at 600 mm o.c. • 12.7 mm regular gypsum board(5) | – | – | 54 | |
| S14d | S14 with • no absorptive material • resilient metal channels spaced at 600 mm o.c. • 15.9 mm Type X gypsum board(5) | 1 h | – | 51 | |
| S14e | S14 with • studs at 400 mm o.c. • no absorptive material • resilient metal channels spaced at 600 mm o.c. • 12.7 mm Type X gypsum board(5) | 1 h | – | 49 | |
| S14f | S14 with • studs at 600 mm o.c. • no absorptive material • resilient metal channels spaced at 600 mm o.c. • 12.7 mm regular gypsum board(5) | 1 h | – | 50 | |
| S14g | S14 with • no absorptive material • resilient metal channels spaced at 600 mm o.c. • 12.7 mm regular gypsum board(5) | – | – | 45 | |
| S14h | S14 with • studs at 400 mm o.c. • 89 mm thick absorptive material • resilient metal channels spaced at 400 mm o.c. • 15.9 mm Type X gypsum board(5) | 1 h | – | 58 | |
| S14i | S14 with • studs at 600 mm o.c. • 89 mm thick absorptive material • resilient metal channels spaced at 400 mm o.c. • 15.9 mm Type X gypsum board(5) | 1 h | – | 60 | |
| S14j | S14 with • 89 mm thick absorptive material • resilient metal channels spaced at 400 mm o.c. • 12.7 mm Type X gypsum board(5) | 45 min [1 h] |
– | 55 | |
| S14k | S14 with • studs at 400 mm o.c. • no absorptive material • resilient metal channels spaced at 400 mm o.c. • 15.9 mm Type X gypsum board(5) | 1 h | – | 49 | |
| S14l | S14 with • studs at 600 mm o.c. • no absorptive material • resilient metal channels spaced at 400 mm o.c. • 15.9 mm Type X gypsum board(5) | 1 h | – | 51 | |
| S14m | S14 with • no absorptive material • resilient metal channels spaced at 400 mm o.c. • 12.7 mm Type X gypsum board(5) | 1 h | – | 47 | |
|
|
• 2 rows of 92 mm loadbearing steel studs spaced 400 mm or 600 mm o.c. • with cross-bracing • with or without absorptive material • 2 layers of gypsum board each side |
 |
|||
| S15a | S15 with • 89 mm thick absorptive material in each cavity • 12.7 mm Type X gypsum board(5) | 1 h | – | 68 | |
| S15b | S15 with • no absorptive material • 12.7 mm Type X gypsum board(5) | 1 h | – | 52 | |
| S15c | S15 with • 89 mm thick absorptive material in each cavity • 15.9 mm Type X gypsum board(5) | 1 h | – | 68 | |
| S15d | S15 with • no absorptive material • 15.9 mm Type X gypsum board(5) | 1.5 h | – | 52 | |
| • Hollow Concrete Block (Normal Weight Aggregate) |
B1 |
• 140 mm or 190 mm concrete block |  |
||
| B1a | • 140 mm bare concrete block(3) | 1 h | 1 h | 48 | |
| B1b | • 190 mm bare concrete block(3) | 1.5 h | 1.5 h | 50 | |
|
B2 |
•140 mm or 190 mm concrete block • no absorptive material • 1 layer gypsum-sand plaster or gypsum board on each side |
 |
|||
| B2a | B2 with • 140 mm concrete block • 12.7 mm gypsum-sand plaster |
2 h | 2 h | 50 | |
| B2b | B2 with • 140 mm concrete block • 12.7 mm Type X gypsum board or 15.9 mm Type X gypsum board(5) | 2 h | 2 h | 47 | |
| B2c | B2 with • 140 mm concrete block • 12.7 mm regular gypsum board(5) | 1.5 h | 1.5 h | 46 | |
| B2d | B2 with • 190 mm concrete block • 12.7 mm gypsum-sand plaster |
2.5 h | 2.5 h | 51 | |
| B2e | B2 with • 190 mm concrete block • 15.9 mm Type X gypsum board(5) | 3 h | 3 h | 50 | |
| B2f | B2 with • 190 mm concrete block • 12.7 mm Type X gypsum board(5) | 2.5 h | 2.5 h | 49 | |
| B2g | B2 with • 190 mm concrete block • 12.7 mm regular gypsum board(5) | 2 h | 2 h | 48 | |
|
B3 |
• 140 mm or 190 mm concrete block • resilient metal channels on one side spaced at 400 mm or 600 mm o.c. • absorptive material filling resilient metal channel space(4) • 1 layer gypsum board on each side |  |
|||
| B3a | B3 with • 140 mm concrete block • 12.7 mm Type X gypsum board or 15.9 mm Type X gypsum board(5) | 2 h | 2 h | 51 | |
| B3b | B3 with • 140 mm concrete block • 12.7 mm regular gypsum board(5)(7) | 1.5 h | 1.5 h | 48 | |
| B3c | B3 with • 190 mm concrete block • 15.9 mm Type X gypsum board(5) | 3 h | 3 h | 54 | |
| B3d | B3 with • 190 mm concrete block • 12.7 mm Type X gypsum board(5) | 2.5 h | 2.5 h | 53 | |
| B3e | B3 with • 190 mm concrete block • 12.7 mm regular gypsum board(5)(7) | 2 h | 2 h | 51 | |
|
B4 |
•140 mm or 190 mm concrete block • resilient metal channels on each side spaced at 400 mm or 600 mm o.c. • with or without absorptive material • 1 layer gypsum board on each side |
 |
|||
| B4a | B4 with • 140 mm concrete block •12.7 mm Type X gypsum board(5), or 15.9 mm Type X gypsum board(5) | 2 h | 2 h | 47 | |
| B4b | B4 with • 140 mm concrete block • 12.7 mm regular gypsum board(5)(7) | 1.5 h | 1.5 h | 42 | |
| B4c | B4 with • 190 mm concrete block • 15.9 mm Type X gypsum board(5) | 3 h | 3 h | 50 | |
| B4d | B4 with • 190 mm concrete block • 12.7 mm Type X gypsum board(5) | 2.5 h | 2.5 h | 49 | |
| B4e | B4 with •190 mm concrete block •12.7 mm regular gypsum board(5)(7) | 2 h | 2 h | 45 | |
|
B5 |
• 190 mm concrete block • 38 mm x 38 mm horizontal or vertical wood strapping on one side spaced at 600 mm o.c. • with or without absorptive material • 1 layer gypsum board on each side |
 |
|||
| B5a | B5 with • 15.9 mm Type X gypsum board(5) | 3 h | 3 h | 54 | |
| B5b | B5 with • 12.7 mm Type X gypsum board(5) | 2.5 h | 2.5 h | 53 | |
| B5c | B5 with • 12.7 mm regular gypsum board(5)(7) | 2 h | 2 h | 51 | |
|
B6 |
• 140 mm or 190 mm concrete block • 38 mm x 38 mm horizontal or vertical wood strapping on each side spaced at 600 mm o.c. • absorptive material filling strapping space on each side(4) • 1 layer gypsum board on each side |  |
|||
| B6a | B6 with • 140 mm concrete block • 12.7 mm Type X gypsum board or 15.9 mm Type X gypsum board(5) | 2 h | 2 h | 57 | |
| B6b | B6 with • 140 mm concrete block • 12.7 mm regular gypsum board(5)(7) | 1.5 h | 1.5 h |
56 |
|
| B6c | B6 with • 190 mm concrete block • 15.9 mm Type X gypsum board(5) | 3 h | 3 h | 60 | |
| B6d | B6 with • 190 mm concrete block • 12.7 mm Type X gypsum board(5) | 2.5 h | 2.5 h | 59 | |
| B6e | B6 with • 190 mm concrete block • 12.7 regular gypsum board(5)(7) | 2 h | 2 h |
57 |
|
|
B7 |
• 190 mm concrete block • 65 mm steel studs each side spaced at 600 mm o.c. • absorptive material filling stud space on each side(4) • 1 layer gypsum board on each side |  |
|||
| B7a | B7 with • 15.9 mm Type X gypsum board(5) | 3 h | 3 h | 71 | |
| B7b | B7 with • 12.7 mm Type X gypsum board(5) | 2.5 h | 2.5 h | 70 | |
| B7c | B7 with • 12.7 mm regular gypsum board(5)(7) | 2 h | 2 h | 69 | |
|
B8 |
• 190 mm concrete block • 38 mm x 64 mm wood studs on each side spaced at 600 mm o.c. • absorptive material filling stud space on each side(4) • 1 layer gypsum board on each side |  |
|||
| B8a | B8 with • 15.9 mm Type X gypsum board(5) | 3 h | 3 h | 71 | |
| B8b | B8 with • 12.7 mm Type X gypsum board(5) | 2.5 h | 2.5 h | 70 | |
| B8c | B8 with • 12.7 mm regular gypsum board(5)(7) | 2 h | 2 h | 69 | |
|
B9 |
• 190 mm concrete block • 50 mm metal Z-bars on each side spaced at 600 mm o.c. (or 38 mm x 38 mm horizontal or vertical wood strapping plus resilient metal channels) • absorptive material filling Z-bar space on each side(4) • 1 layer gypsum board on each side |  |
|||
| B9a | B9 with • 15.9 mm Type X gypsum board(5) | 3 h | 3 h | 65 | |
| B9b | B9 with • 12.7 mm Type X gypsum board(5) | 2.5 h | 2.5 h | 64 | |
| B9c | B9 with • 12.7 mm regular gypsum board(5)(7) | 2 h | 2 h | 63 | |
|
B10 |
• 190 mm concrete block • resilient metal channels on one side spaced at 600 mm o.c. • absorptive material filling resilient metal channel space(4) • 2 layers gypsum board on one side only |  |
|||
| B10a | B10 with • 15.9 mm Type X gypsum board(5) | 3 h | 3 h | 56 | |
| B10b | B10 with • 12.7 mm Type X gypsum board(5) | 2.5 h | 2.5 h | 55 | |
| B10c | B10 with • 12.7 mm regular gypsum board(5) | 2 h | 2 h | 54 | |
| Notes to Table A-9.10.3.1.A: | |
|
|
|
| (1) | Fire-resistance and STC ratings of wood-frame construction were evaluated only for
constructions with solid-sawn 38 mm x 89 mm lumber. However, the fire-resistance and STC ratings provided for 38 mm x 89 mm wood-frame construction may be applied to wood-frame constructions with solid-sawn 38 mm x 140 mm lumber; in some cases the ratings may be conservative. Where 38 mm x 140 mm framing is used and absorptive material is called for, the absorptive material must be 140 mm thick. (See D-1.2.1.(2) in Appendix D for the significance of fire-resistance ratings.) The STC ratings may also be applied to fingerjoined lumber. The fire-resistance ratings are applicable to constructions using fingerjoined lumber that has been manufactured
with a heat-resistant adhesive (HRA) in accordance with NLGA special product standard
SPS-1, “Fingerjoined Structural Lumber,” or SPS-3, “Fingerjoined 'Vertical Stud Use Only' Lumber.” (See also A-9.23.10.4.(1).) |
| (2) | Sound ratings listed are based on the most reliable laboratory test data available for specimens conforming to installation details required by CSA A82.31-M, “Gypsum Board Application.” Results of specific tests may differ slightly because of measurement precision and minor variations in construction details. These results should only be used where the actual construction details, including spacing of fasteners and supporting framing, correspond exactly to the details of the test specimens on which the ratings are based. Assemblies with sound transmission class ratings of 50 or more require acoustical sealant applied around electrical boxes and other openings, and at the junction of intersecting walls and floors, except intersection of walls constructed of concrete or solid brick. |
| (3) | Sound ratings are only valid where there are no discernible cracks or voids in the visible surfaces. For concrete blocks, surfaces must be sealed by at least 2 coats of paint or other surface finish described in Section 9.29. to prevent sound leakage. |
| (4) | Sound absorptive material includes fibre processed from rock, slag, glass or cellulose fibre. It must fill at least 90% of the cavity thickness for the wall to have the listed STC value. The absorptive material should not overfill the cavity to the point of producing significant outward pressure on the finishes; such an assembly will not achieve the STC rating. Where the absorptive material used with steel stud assemblies is in batt form, “steel stud batts,” which are wide enough to fill the cavity from the web of one stud to the web of the adjacent stud, must be used. |
| (5) | The complete descriptions of indicated finishes are as follows:
|
| (6) | Absorptive material required for the higher fire-resistance rating is mineral fibre processed from rock or slag with a mass of at least 4.8 kg/m² for 150 mm thickness, 2.8 kg/m² for 89 mm thickness and 2.0 kg/m² for 65 mm thickness and completely filling the wall cavity. For assemblies with double wood studs on separate plates, absorptive material is required in the stud cavities on both sides. |
| (7) | Regular gypsum board used in single layer assemblies must be installed so all edges are supported. |
| (8) | Where bracing material, such as diagonal lumber or plywood, OSB, gypsum board or fibreboard sheathing is installed on the inner face of one row of studs in double stud assemblies, the STC rating will be reduced by 3 for any assemblies containing absorptive material in both rows of studs or in the row of studs opposite to that to which the bracing material is attached. Attaching such layers on both inner faces of the studs may drastically reduce the STC value but enough data to permit assignment of STC ratings for this situation is not available. The fire-resistance rating is not affected by the inclusion of such bracing. |
| (9) | For exterior walls, the finish joints must be taped and finished for the outer layer of the interior side only. The gypsum board on the exterior side may be replaced with gypsum sheathing of the same thickness and type (regular or Type X). |
| Table A-9.10.3.1.B Fire and Sound Resistance of Floors, Ceilings and Roofs Forming part of Appendix Note A-9.10.3.1. | |||||
| Type of Assembly | Assembly Number | ||||
| Floors and Ceilings | |||||
| Concrete Slabs |
F1 |
• concrete floors |  |
||
| F1a | • 90 mm reinforced concrete with 20 mm minimum cover over reinforcing steel | 1 h | 47 | 23 | |
| F1b | • 130 mm reinforced concrete with 25 mm minimum cover over reinforcing steel | 2 h | 52 | 27 | |
| F1c | • pre-stressed hollow core slab 200 mm deep with 25 mm minimum cover over reinforcing steel | 1 h | 50 | 28 | |
| F1d | • 150 mm composite slab on 75 mm steel deck with 152 x 152 x MW3.8 x MW3.8 wire mesh | – | 51 | 21 | |
| F1e | • 150 mm composite slab on 75 mm steel deck with 152 x 152 x MW3.8 x MW3.8 wire mesh • resilient metal channels 400 mm or 600 mm o.c. • 2 layers of 12.7 mm Type X gypsum board or 2 layers of 15.9 mm Type X gypsum board |
1.5 h | 57 | 36 | |
| Open Web Steel Joists |
F2 |
• open web steel joists with concrete floor |  |
||
| F2a | • 50 mm thick concrete deck • on open web steel joists spaced 400 mm o.c. • furring channels spaced not more than 600 mm o.c. wired to underside of joists • 1 layer of 15.9 mm Type X gypsum board on ceiling side |
45 min | 53 | 27 | |
| F2b | • 65 mm regular concrete minimum 155 kg/m2 • on composite steel joists spaced 1250 mm o.c. • furring channels spaced not more than 600 mm o.c. wired to underside of joists • 1 layer of 12.7 mm or 15.9 mm Type X gypsum board on ceiling side |
1.5 h | 53 | 28 | |
|
Wood Floor Joists(11) |
F3 |
• subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood joists or wood I-joists spaced not more than 600 mm o.c.• with or without absorptive material in cavity • 1 layer of gypsum board on ceiling side |  |
||
| F3a | F3 with • no absorptive material in cavity • 15.9 mm Type X gypsum board |
– | 29 | 27 | |
| F3b | F3 with • absorptive material in cavity • 15.9 mm Type X gypsum board |
– | 31 | 30 | |
| F3c | F3 with • no absorptive material in cavity • 12.7 mm Type X gypsum board |
– | 27 | 26 | |
| F3d | F3 with • absorptive material in cavity • 12.7 mm Type X gypsum board |
– | 29 | 29 | |
| F3e | F3 with • no absorptive material in cavity • 12.7 mm regular gypsum board |
– | 27 | 25 | |
| F3f | F3 with • absorptive material in cavity • 12.7 mm regular gypsum board |
– | 29 | 28 | |
|
F4(12) |
• subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood joists or wood I-joists spaced not more than 600 mm o.c.• with or without absorptive material in cavity • 2 layers of gypsum board on ceiling side |  |
|||
| F4a | F4 with • wood joists or wood I-joists spaced 400 mm o.c. • no absorptive material in cavity • 15.9 mm Type X gypsum board |
1 h | 33 | 31 | |
| F4b | F4 with • wood joists or wood I-joists spaced 600 mm o.c. • no absorptive material in cavity • 15.9 mm Type X gypsum board | 1 h | 34 | 31 | |
| F4c | F4 with• wood joists or wood I-joists spaced 400 mm o.c. • absorptive material in cavity • 15.9 mm Type X gypsum board | 45 min [1 h](13) | 35 | 34 | |
| F4d | F4 with • wood joists or wood I-joists spaced 600 mm o.c. • absorptive material in cavity • 15.9 mm Type X gypsum board | 45 min | 38 | 34 | |
| F4e | F4 with• wood joists or wood I-joists spaced 400 mm o.c. • no absorptive material in cavity • 12.7 mm Type X gypsum board | 1 h | 32 | 30 | |
| F4f | F4 with • wood joists or wood I-joists spaced 400 mm o.c. • no absorptive material in cavity • 12.7 mm Type X gypsum board | 45 min | 33 | 30 | |
| F4g | F4 with• wood joists or wood I-joists spaced 400 mm o.c. • absorptive material in cavity • 12.7 mm Type X gypsum board | 45 min | 34 | 33 | |
| F4h | F4 with • wood joists or wood I-joists spaced 600 mm o.c. • absorptive material in cavity • 12.7 mm Type X gypsum board | – | 35 | 33 | |
| F4i | F4 with • no absorptive material in cavity • 12.7 mm regular gypsum board |
– | 31 | 30 | |
| F4j | F4 with • absorptive material in cavity • 12.7 mm regular gypsum board |
– | 33 | 33 | |
|
F5(12) |
• subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood joists or wood I-joists spaced not more than 600 mm o.c.• with or without absorptive material in cavity • steel furring channels spaced 400 mm or 600 mm o.c.• 1 layer of gypsum board on ceiling side |  |
|||
| F5a | F5 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c.• 15.9 mm Type X gypsum | 30 min | 35 | 37 | |
| F5b | F5 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c• 15.9 mm Type X gypsum board | 30 min | 37 | 30 | |
| F5c | F5 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c.• 15.9 mm Type X gypsum board |
30 min |
38 | 30 | |
| F5d | F5 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c.• 15.9 mm Type X gypsum board |
30 min |
40 | 33 | |
| F5e | F5 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c.• 12.7 mm Type X gypsum board | 30 min | 33 | 26 | |
| F5f | F5 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c.• 12.7 mm Type X gypsum board | 30 min | 35 | 29 | |
| F5g | F5 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c.• 12.7 mm Type X gypsum board |
30 min |
36 | 29 | |
| F5h | F5 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c.• 12.7 mm Type X gypsum board |
30 min |
38 | 32 | |
| F5i | F5 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c.• 12.7 mm regular gypsum board | < 30 min | 33 | 25 | |
| F5j | F5 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c.• 12.7 mm regular gypsum board | < 30 min | 35 | 28 | |
| F5k | F5 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c.• 12.7 mm regular gypsum board | < 30 min | 36 | 28 | |
| F5l | F5 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c.• 12.7 mm regular gypsum board | < 30 min | 38 | 33 | |
|
F6(12) |
• subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood joists or wood I-joists spaced not more than 600 mm o.c.• with or without absorptive material in cavity • steel furring channels spaced 400 mm or 600 mm o.c.• 2 layers of gypsum board on ceiling side |  |
|||
| F6a(15) | F6 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c.• 15.9 mm Type X gypsum boad | 1 h | 39 | 32 | |
| F6b(15) | F6 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c.• 15.9 mm Type X gypsum board | 1 h | 41 | 32 | |
| F6c(15) | F6 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c.• 15.9 mm Type X gypsum board | 1 h | 42 | 35 | |
| F6d(15) | F6 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c.• 15.9 mm Type X gypsum board | 1 h | 44 | 37 | |
| F6e(15) | F6 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c.• 12.7 mm Type X gypsum board | 1 h | 38 | 30 | |
| F6f(15) | F6 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c.• 12.7 mm Type X gypsum board | 1 h | 40 | 33 | |
| F6g(15) | F6 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c.• 12.7 mm Type X gypsum board | 1 h | 41 | 33 | |
| F6h(15) | F6 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c.• 12.7 mm Type X gypsum board | 45 min [1 h](16) | 43 | 36 | |
| F6i | F6 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c.• 12.7 mm regular gypsum board | – | 37 | 30 | |
| F6j | F6 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c.• 12.7 mm regular gypsum board | – | 39 | 33 | |
| F6k | F6 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c.• 12.7 mm regular gypsum board | – | 40 | 33 | |
| F6l | F6 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c.• 12.7 mm regular gypsum board | – | 42 | 36 | |
|
F7(12) |
• subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood joists or wood I-joists spaced not more than 600 mm o.c.• with or without absorptive material in cavity • 1 layer of gypsum board attached directly to joists on ceiling side • resilient metal channels spaced 400 mm or 600 mm o.c. attached to joists through gypsum board • 1 layer of gypsum board attached to resilient metal channels |  |
|||
| F7a(15) | F7 with • no absorptive material in cavity • 15.9 mm Type X gypsum board • resilient metal channels • 15.9 mm Type X gypsum board |
1 h | 35 | 27 | |
| F7b(15) | F7 with • absorptive material in cavity • 15.9 mm Type X gypsum board • resilient metal channels • 15.9 mm Type X gypsum board |
1 h | 37 | 30 | |
| F7c(15) | F7 with • no absorptive material in cavity • 12.7 mm Type X gypsum board • resilient metal channels • 12.7 mm Type X gypsum board |
1 h | 35 | 27 | |
| F7d(15) | F7 with • absorptive material in cavity • 12.7 mm Type X gypsum board • resilient metal channels • 12.7 mm Type X gypsum board |
1 h | 37 | 30 | |
| F7e | F7 with • no absorptive material in cavity • 12.7 mm regular gypsum board • resilient metal channels • 12.7 mm regular gypsum board |
– | 32 | 26 | |
| F7f | F7 with • absorptive material in cavity • 12.7 mm regular gypsum board • resilient metal channels • 12.7 mm regular gypsum board |
– | 35 | 28 | |
|
F8(12) |
• subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood joists or wood I-joists spaced not more than 600 mm o.c.• with or without absorptive material in cavity • resilient metal channels spaced 400 mm or 600 mm o.c. • 1 layer of gypsum board on ceiling side |  |
|||
| F8a | F8 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
30 min | 41 | 33 | |
| F8b | F8 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
30 min | 43 | 36 | |
| F8c | F8 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
30 min |
48 |
41 | |
| F8d | F8 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
30 min | 50 | 44 | |
| F8e | F8 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
30 min | 39 | 32 | |
| F8f | F8 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
30 min | 41 | 35 | |
| F8g | F8 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
30 min |
46 | 40 | |
| F8h | F8 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
30 min |
48 | 43 | |
| F8i | F8 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
< 30 min | 41 | 31 | |
| F8j | F8 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
< 30 min | 41 | 34 | |
| F8k | F8 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
< 30 min | 46 | 39 | |
| F8l | F8 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
< 30 min | 48 | 42 | |
|
F9(12) |
• subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood joists or wood I-joists spaced not more than 600 mm o.c.• with or without absorptive material in cavity • resilient metal channels spaced 400 mm or 600 mm o.c. • 2 layers of gypsum board on ceiling side |  |
|||
| F9a(15) | F9 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 45 | 38 | |
| F9b(15) | F9 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 47 | 40 | |
| F9c(15) | F9 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h [1.5 h](17) | 52 [54](17) | 46 | |
| F9d(15) | F9 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
1 h [1.5 h](17) | 54 [56](17) | 48 | |
| F9e(15) | F9 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 44 | 36 | |
| F9f(15) | F9 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 46 | 39 | |
| F9g(15) | F9 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h [1.5 h](17) | 51 [53](17) | 44 | |
| F9h(15) | F9 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
45 min [1 h](16) | 53 | 47 | |
| F9i | F9 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 43 | 36 | |
| F9j | F9 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 45 | 39 | |
| F9k | F9 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 50 | 44 | |
| F9l | F9 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 52 | 47 | |
|
F10(12) |
• one subfloor layer of 11 mm sanded plywood, or OSB or waferboard • one subfloor layer of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood joists or wood I-joists spaced not more than 600 mm o.c.• with or without absorptive material in cavity • resilient metal channels spaced 300, 400 or 600 mm o.c.• 1 layer of gypsum board on ceiling side |  |
|||
| F10a | F10 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
30 min | 44 | 34 | |
| F10b | F10 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
30 min | 46 | 37 | |
| F10c | F10 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
30 min |
51 | 42 | |
| F10d | F10 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
30 min [45 min](14) | 53 | 45 | |
| F10e | F10 with • wood joists spaced at 400 mm o.c. • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board | 1 h(18) | 53(18) | 44 | |
| F10f(19) | F10 with • wood I-joists spaced at 400 mm o.c. • absorptive material in cavity • resilient metal channels spaced 300 mm o.c. • 15.9 mm Type X gypsum board | 1 h(18) | 52(18) | 43 | |
| F10g | F10 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
30 min | 42 | 33 | |
| F10h | F10 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
30 min | 44 | 36 | |
| F10i | F10 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
30 min [45 min](16) | 49 | 41 | |
| F10j | F10 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
30 min [45 min](14) | 51 | 44 | |
| F10k | F10 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 42 | 33 | |
| F10l | F10 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 44 | 35 | |
| F10m | F10 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– |
|
41 | |
| F10n | F10 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– |
|
43 | |
|
F11(12) |
• one subfloor layer of 11 mm sanded plywood, or OSB or waferboard • one subfloor layer of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood joists or wood I-joists spaced not more than 600 mm o.c.• with or without absorptive material in cavity • resilient metal channels spaced 400 mm or 600 mm o.c. • 2 layers of gypsum board on ceiling side |  |
|||
| F11a(15) | F11 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 48 | 39 | |
| F11b(15) | F11 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 50 | 42 | |
| F11c(15) | F11 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h[1.5 h](17) | 55 [56](17) | 47 | |
| F11d(15) | F11 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
1 h[1.5 h](17) | 57 [58](17) | 50 | |
| F11e(15) | F11 with • wood joists spaced 400 mm o.c. • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board | 1.5 h(20) | 56(20) | 47 | |
| F11f(19) | F11 with• wood I-joists spaced 400 mm o.c. • absorptive material in cavity • resilient metal channels spaced 300 mm o.c. • 15.9 mm Type X gypsum board | 1.5 h(20) | 56(20) | 46 | |
| F11g(15) | F11 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 47 | 38 | |
| F11h(15) | F11 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 49 | 40 | |
| F11i(15) | F11 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h [1.5 h](17) | 54 [55](17) | 46 | |
| F11j(15) | F11 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
45 min [1 h](16) | 56 | 48 | |
| F11k | F11 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 46 | 37 | |
| F11l | F11 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 48 | 40 | |
| F11m | F11 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 53 | 45 | |
| F11n | F11 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 55 | 48 | |
|
F12(12) |
• 25 mm gypsum-concrete topping (at least 44 kg/m2) • subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood joists or wood I-joists spaced not more than 600 mm o.c.• with or without absorptive material in cavity • 1 layer of gypsum board on ceiling side |  |
|||
| F12a | F12 with • no absorptive material in cavity • 15.9 mm Type X gypsum board |
– | 41 | 13 | |
| F12b | F12 with • absorptive material in cavity • 15.9 mm Type X gypsum board |
– | 43 | 16 | |
| F12c | F12 with • no absorptive material in cavity • 12.7 mm Type X gypsum board |
– | 39 | 12 | |
| F12d | F12 with • absorptive material in cavity • 12.7 mm Type X gypsum board |
– | 41 | 15 | |
| F12e | F12 with • no absorptive material in cavity • 12.7 mm regular gypsum board |
– | 39 | 12 | |
| F12f | F12 with • absorptive material in cavity • 12.7 mm regular gypsum board |
– | 41 | 15 | |
|
F13(12) |
• 25 mm gypsum-concrete topping (at least 44 kg/m2) • subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood joists or wood I-joists spaced not more than 600 mm o.c.• with or without absorptive material in cavity • 2 layers of gypsum board on ceiling side |  |
|||
| F13a | F13 with• wood joists or wood I-joists spaced 400 mm o.c. • no absorptive material in cavity • 15.9 mm Type X gypsum board | 1 h | 43 | 16 | |
| F13b | F13 with • wood joists or wood I-joists spaced 600 mm o.c. • no absorptive material in cavity • 15.9 mm Type X gypsum board | 1 h | 45 | 16 | |
| F13c | F13 with• wood joists or wood I-joists spaced 400 mm o.c. • absorptive material in cavity • 15.9 mm Type X gypsum board | 45 min [1 h](13) | 45 | 19 | |
| F13d | F13 with • wood joists or wood I-joists spaced 600 mm o.c. • absorptive material in cavity • 15.9 mm Type X gypsum board | 45 min | 47 | 19 | |
| F13e | F13 with• wood joists or wood I-joists spaced 400 mm o.c. • no absorptive material in cavity • 12.7 mm Type X gypsum board | 1 h | 42 | 15 | |
| F13f | F13 with • wood joists or wood I-joists spaced 600 mm o.c. • no absorptive material in cavity • 12.7 mm Type X gypsum board | 45 min | 44 | 15 | |
| F13g | F13 with• wood joists or wood I-joists spaced 400 mm o.c. • absorptive material in cavity • 12.7 mm Type X gypsum board | 45 min | 44 | 18 | |
| F13h | F13 with• wood joists or wood I-joists spaced 600 mm o.c. • no absorptive material in cavity • 12.7 mm Type X gypsum board | – | 46 | 18 | |
| F13i | F13 with • no absorptive material in cavity • 12.7 mm regular gypsum board |
– | 41 | 14 | |
| F13j | F13 with • absorptive material in cavity • 12.7 mm regular gypsum board |
– | 45 | 14 | |
|
F14(12) |
• 25 mm gypsum-concrete topping (at least 44 kg/m2) • subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood joists or wood I-joists spaced not more than 600 mm o.c.• with or without absorptive material in cavity • resilient metal channels spaced 300, 400 or 600 mm o.c.• 1 layer of gypsum board on ceiling side |  |
|||
| F14a | F14 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
– | 53 | 22 | |
| F14b | F14 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
– | 55 | 22 | |
| F14c | F14 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
30 min |
60 | 30 | |
| F14d | F14 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
– | 62 | 30 | |
| F14e | F14 with • wood joists spaced 400 mm o.c. • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board | 1 h(18) | 60(18) | 31 | |
| F14f(19) | F14 with • wood I-joists spaced 400 mm o.c. • absorptive material in cavity • resilient metal channels spaced 300 mm o.c. • 15.9 mm Type X gypsum board | 1 h(18) | 61(18) | 31 | |
| F14g | F14 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
– | 51 | 21 | |
| F14h | F14 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
– | 53 | 21 | |
| F14i | F14 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
– | 58 | 29 | |
| F14j | F14 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
– | 60 | 29 | |
| F14k | F14 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 51 | 21 | |
| F14l | F14 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 53 | 21 | |
| F14m | F14 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 58 | 29 | |
| F14n | F14 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 60 | 29 | |
|
F15(12) |
• 25 mm gypsum-concrete topping (at least 44 kg/m2) • subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood joists or wood I-joists spaced not more than 600 mm o.c.• with or without absorptive material in cavity • resilient metal channels spaced 400 mm or 600 mm o.c. • 2 layers of gypsum board on ceiling side |  |
|||
| F15a(15) | F15 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h(21) |
57 | 25 | |
| F15b(15) | F15 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 59 | 25 | |
| F15c(15) | F15 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h [1.5 h](17) | 64 [65](17) | 33 | |
| F15d(15) | F15 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
1 h [1.5 h](17) | 66 [67](17) | 33 | |
| F15e(15) | F15 with • wood joists spaced 400 mm o.c. • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board | 1.5 h(20) | 65(20) | 33 | |
| F15f(19) | F15 with • wood I-joists spaced 400 mm o.c. • absorptive material in cavity • resilient metal channels spaced 300 mm o.c. • 15.9 mm Type X gypsum board | 1.5 h(20) | 64(20) | 33 | |
| F15g(15) | F15 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h |
56 | 24 | |
| F15h(15) | F15 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 58 | 24 | |
| F15i(15) | F15 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h [1.5 h](17) | 63 [64](17) | 32 | |
| F15j(15) | F15 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
45 min [1 h](16) | 65 | 32 | |
| F15k | F15 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 55 | 23 | |
| F15l | F15 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 57 | 23 | |
| F15m | F15 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 62 | 31 | |
| F15n | F15 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 64 | 31 | |
|
F16(12) |
• 38 mm concrete topping (at least 70 kg/m2) • subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood joists or wood I-joists spaced not more than 600 mm o.c.• with or without absorptive material in cavity • 1 layer of gypsum board on ceiling side |  |
|||
| F16a | F 16 with • no absorptive material in cavity • 15.9 mm Type X gypsum board |
– | 44 | 22 | |
| F16b | F16 with • absorptive material in cavity • 15.9 mm Type X gypsum board |
– | 46 | 25 | |
| F16c | F16 with • no absorptive material in cavity • 12.7 mm Type X gypsum board |
– | 43 | 21 | |
| F16d | F16 with • absorptive material in cavity • 12.7 mm Type X gypsum board |
– | 45 | 24 | |
| F16e | F16 with • no absorptive material in cavity • 12.7 mm regular gypsum board |
– | 42 | 21 | |
| F16f | F16 with • absorptive material in cavity • 12.7 mm regular gypsum board |
– | 44 | 24 | |
|
F17(12) |
• 38 mm concrete topping (at least 70 kg/m2) • subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood joists or wood I-joists spaced not more than 600 mm o.c.• with or without absorptive material in cavity • 2 layers of gypsum board on ceiling side |  |
|||
| F17a | F17 with• wood joists or wood I-joists spaced 400 mm o.c. • no absorptive material in cavity • 15.9 mm Type X gypsum board | 1 h | 48 | 24 | |
| F17b | F17 with • wood joists or wood I-joists spaced 600 mm o.c. • no absorptive material in cavity • 15.9 mm Type X gypsum board | 1 h | 51 | 24 | |
| F17c | F17 with• wood joists or wood I-joists spaced 400 mm o.c. • absorptive material in cavity • 15.9 mm Type X gypsum board | 45 min [1 h](13) | 48 | 27 | |
| F17d | F17 with • wood joists or wood I-joists spaced 600 mm o.c. • absorptive material in cavity • 15.9 mm Type X gypsum board | 45 min | 51 | 27 | |
| F17e | F17 with• wood joists or wood I-joists spaced 400 mm o.c. • no absorptive material in cavity • 12.7 mm Type X gypsum board | 1 h | 47 | 23 | |
| F17f | F17 with • wood joists or wood I-joists spaced 600 mm o.c. • no absorptive material in cavity • 12.7 mm Type X gypsum board | 45 min | 48 | 23 | |
| F17g | F17 with• wood joists or wood I-joists spaced 400 mm o.c. • absorptive material in cavity • 12.7 mm Type X gypsum board | 45 min |
49 |
26 | |
| F17h | F17 with• wood joists or wood I-joists spaced 600 mm o.c. • absorptive material in cavity • 12.7 mm Type X gypsum board | – | 50 | 26 | |
| F17i | F17 with • no absorptive material in cavity • 12.7 mm regular gypsum board |
– | 47 | 23 | |
| F17j | F17 with • absorptive material in cavity • 12.7 mm regular gypsum board |
– | 49 | 26 | |
|
F18(12) |
• 38 mm concrete topping (at least 70 kg/m2) • subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood joists or wood I-joists spaced not more than 600 mm o.c.• with or without absorptive material in cavity • steel furring channels spaced 400 mm or 600 mm o.c. • 1 layer of gypsum board on ceiling side |  |
|||
| F18a | F18 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
– | 50 | 25 | |
| F18b | F18 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
– | 52 | 25 | |
| F18c | F18 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
– | 53 | 28 | |
| F18d | F18 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
– | 55 | 28 | |
| F18e | F18 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
– | 49 | 24 | |
| F18f | F18 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
– | 51 | 24 | |
| F18g | F18 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
– | 52 | 27 | |
| F18h | F18 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
– | 54 | 27 | |
| F18i | F18 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 48 | 24 | |
| F18j | F18 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 50 | 24 | |
| F18k | F18 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 51 | 27 | |
| F18l | F18 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 53 | 27 | |
|
F19(12) |
• 38 mm concrete topping (at least 70 kg/m2) • subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood joists or wood I-joists spaced not more than 600 mm o.c.• with or without absorptive material in cavity • steel furring channels spaced 400 mm or 600 mm o.c.• 2 layers of gypsum board on ceiling side |  |
|||
| F19a(15) | F19 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 54 | 27 | |
| F19b(15) | F19 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 56 | 27 | |
| F19c(15) | F19 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 57 | 30 | |
| F19d(15) | F19 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 59 | 30 | |
| F19e(15) | F19 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 53 | 26 | |
| F19f(15) | F19 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 55 | 26 | |
| F19g(15) | F19 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 56 | 29 | |
| F19h(15) | F19 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 58 | 29 | |
| F19i | F19 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 53 | 26 | |
| F19j | F19 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 55 | 26 | |
| F19k | F19 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 56 | 29 | |
| F19l | F19 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 58 | 29 | |
|
F20(12) |
• 38 mm concrete topping (at least 70 kg/m2) • subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood joists or wood I-joists spaced not more than 600 mm o.c.• with or without absorptive material in cavity • resilient metal channels spaced 300, 400 or 600 mm o.c.• 1 layer of gypsum board on ceiling side |  |
|||
| F20a | F20 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
45 min(21) |
56 | 31 | |
| F20b | F20 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
– | 58 | 31 | |
| F20c | F20 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
63 | 39 | ||
| F20d | F20 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
– | 65 | 39 | |
| F20e | F20 with • wood joists spaced 400 mm o.c. • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board | 1 h(18) | 64(18) | 40 | |
| F20f(19) | F20 with • wood I-joists spaced 400 mm o.c. • absorptive material in cavity • resilient metal channels spaced 300 mm o.c. • 15.9 mm Type X gypsum board | 1 h(18) | 65(18) | 40 | |
| F20g | F20 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
– | 55 | 30 | |
| F20h | F20 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
– | 57 | 30 | |
| F20i | F20 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
– | 62 | 38 | |
| F20j | F20 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
– | 64 | 38 | |
| F20k | F20 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 54 | 30 | |
| F20l | F20 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 56 | 30 | |
| F20m | F20 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 61 | 38 | |
| F20n | F20 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 63 | 38 | |
|
F21(12) |
• 38 mm concrete topping (at least 70 kg/m2) • subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood joists or wood I-joists spaced not more than 600 mm o.c.• with or without absorptive material in cavity • resilient metal channels spaced 400 mm or 600 mm o.c. • 2 layers of gypsum board on ceiling side |  |
|||
| F21a(15) | F21 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 60 | 33 | |
| F21b(15) | F21 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 62 | 33 | |
| F21c(15) | F21 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h [1.5 h](17) | 67 [68](17) | 41 [42](17) | |
| F21d(15) | F21 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h [1.5 h](17) | 69 [70](17) | 41 [42](17) | |
| F21e(15) | F21 with • wood joists spaced 400 mm o.c. • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board | [1.5 h](20) | 68(20) | 42 | |
| F21f(19) | F21 with • wood I-joists spaced 400 mm o.c. • absorptive material in cavity • resilient metal channels spaced 300 mm o.c. • 15.9 mm Type X gypsum board | [1.5 h](20) | 68(20) | 42 | |
| F21g(15) | F21 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 59 | 32 | |
| F21h(15) | F21 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 61 | 32 | |
| F21i(15) | F21 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h [1.5 h](17) | 66 [67](17) | 40 | |
| F21j(15) | F21 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 68 | 40 | |
| F21k | F21 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 59 | 32 | |
| F21l | F21 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 61 | 32 | |
| F21m | F21 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 66 | 40 | |
| F21n | F21 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 68 | 40 | |
|
Wood Floor Trusses(22) |
F22 |
• subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood trusses spaced not more than 600 mm o.c. • with or without absorptive material in cavity • 1 layer gypsum board on ceiling side |
 |
||
| F22a | F22 with • no absorptive material in cavity • 15.9 mm Type X gypsum board |
– | 29 | 27 | |
| F22b | F22 with • absorptive material in cavity • 15.9 mm Type X gypsum board |
– | 31 | 30 | |
| F22c | F22 with • no absorptive material in cavity • 12.7 mm Type X gypsum board |
– | 28 | 26 | |
| F22d | F22 with • absorptive material in cavity • 12.7 mm Type X gypsum board |
– | 30 | 29 | |
| F22e | F22 with • no absorptive material in cavity • 12.7 mm regular gypsum board |
– | 27 | 25 | |
| F22f | F22 with • absorptive material in cavity • 12.7 mm regular gypsum board |
– | 31 | 28 | |
|
F23 |
• subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood trusses spaced not more than 600 mm o.c. • with or without absorptive material in cavity • 2 layers of gypsum board on ceiling side |
 |
|||
| F23a | F23 with• wood trusses spaced 400 mm o.c. • no absorptive material in cavity • 15.9 mm Type X gypsum board | 1 h | 34 | 31 | |
| F23b | F23 with • wood trusses spaced 600 mm o.c. • no absorptive material in cavity • 15.9 mm Type X gypsum board | 1 h | 35 | 31 | |
| F23c | F23 with• wood trusses spaced 400 mm o.c. • absorptive material in cavity • 15.9 mm Type X gypsum board | 45 min [1 h](13) | 36 | 34 | |
| F23d | F23 with • wood trusses spaced 600 mm o.c. • absorptive material in cavity • 15.9 mm Type X gypsum board | 45 min | 37 | 34 | |
| F23e | F23 with• wood trusses spaced 400 mm o.c. • no absorptive material in cavity • 12.7 mm Type X gypsum board | 1 h | 32 | 30 | |
| F23f | F23 with • wood trusses spaced 600 mm o.c. • no absorptive material in cavity • 12.7 mm Type X gypsum board | 45 min | 33 | 30 | |
| F23g | F23 with • absorptive material in cavity • 12.7 mm Type X gypsum board |
– | 34 | 33 | |
| F23h | F23 with • no absorptive material in cavity • 12.7 mm regular gypsum board |
– | 32 | 30 | |
| F23i | F23 with • absorptive material in cavity • 12.7 mm regular gypsum board |
– | 34 | 33 | |
|
F24 |
• subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood trusses spaced not more than 600 mm o.c. • with or without absorptive material in cavity • steel furring channels spaced 400 mm or 600 mm o.c. • 1 layer of gypsum board on ceiling side |
 |
|||
| F24a | F24 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
– | 35 | 27 | |
| F24b | F24 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
– | 37 | 30 | |
| F24c | F24 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
– | 38 | 30 | |
| F24d | F24 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
– | 40 | 33 | |
| F24e | F24 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
– | 33 | 26 | |
| F24f | F24 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
– | 36 | 29 | |
| F24g | F24 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
– | 37 | 29 | |
| F24h | F24 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
– | 39 | 32 | |
| F24i | F24 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 33 | 25 | |
| F24j | F24 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 35 | 28 | |
| F24k | F24 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 36 | 28 | |
| F24l | F24 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 38 | 31 | |
|
F25 |
• subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood trusses spaced not more than 600 mm o.c. • with or without absorptive material in cavity • steel furring channels spaced 400 mm or 600 mm o.c.• 2 layers of gypsum board on ceiling side |  |
|||
| F25a | F25 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 40 | 32 | |
| F25b | F25 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 42 | 34 | |
| F25c | F25 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 43 | 35 | |
| F25d | F25 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
45 min [1 h](16) | 45 | 37 | |
| F25e | F25 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 38 | 30 | |
| F25f | F25 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 40 | 33 | |
| F25g | F25 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 41 | 33 | |
| F25h | F25 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
45 min [1 h](16) | 43 | 36 | |
| F25i | F25 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 38 | 30 | |
| F25j | F25 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c.• 12.7 mm regular gypsum board | – | 40 | 33 | |
| F25k | F25 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c.• 12.7 mm regular gypsum board | – | 41 | 33 | |
| F25l | F25 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c.• 12.7 mm regular gypsum board | – | 43 | 36 | |
|
F26 |
• subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood trusses spaced not more than 600 mm o.c. • with or without absorptive material in cavity • 1 layer of gypsum board attached directly to trusses on ceiling side • resilient metal channels spaced 400 mm or 600 mm o.c. attached to trusses through the gypsum board • 1 layer of gypsum board attached to resilient metal channels |  |
|||
| F26a | F26 with • no absorptive material in cavity • 15.9 mm Type X gypsum board • resilient metal channels • 15.9 mm Type X gypsum board |
– | 35 | 27 | |
| F26b | F26 with • absorptive material in cavity • 15.9 mm Type X gypsum board • resilient metal channels • 15.9 mm Type X gypsum board |
– | 37 | 30 | |
| F26c | F26 with • no absorptive material in cavity • 12.7 mm Type X gypsum board • resilient metal channels • 12.7 mm Type X gypsum board |
– | 35 | 27 | |
| F26d | F26 with • absorptive material in cavity • 12.7 mm Type X gypsum board • resilient metal channels • 12.7 mm Type X gypsum board |
– | 37 | 30 | |
| F26e | F26 with • no absorptive material in cavity • 12.7 mm regular gypsum board • resilient metal channels • 12.7 mm regular gypsum board |
– | 32 | 26 | |
| F26f | F26 with • absorptive material in cavity • 12.7 mm regular gypsum board • resilient metal channels • 12.7 mm regular gypsum board |
– | 35 | 28 | |
|
F27 |
• subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood trusses spaced not more than 600 mm o.c. • with or without absorptive material in cavity • resilient metal channels spaced 400 mm or 600 mm o.c. • 1 layer of gypsum board on ceiling side |
 |
|||
| F27a | F27 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
– | 41 | 33 | |
| F27b | F27 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
– | 43 | 36 | |
| F27c | F27 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
30 min |
48 |
41 | |
| F27d | F27 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
– | 50 | 44 | |
| F27e | F27 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
– | 40 | 32 | |
| F27f | F27 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
– | 42 | 35 | |
| F27g | F27 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
– | 47 | 40 | |
| F27h | F27 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
– |
49 |
43 | |
| F27i | F27 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 39 | 31 | |
| F27j | F27 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 41 | 34 | |
| F27k | F27 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 46 | 39 | |
| F27l | F27 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 48 | 42 | |
|
F28 |
• subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood trusses spaced not more than 600 mm o.c. • with or without absorptive material in cavity • resilient metal channels spaced 400 mm or 600 mm o.c. • 2 layers of gypsum board on ceiling side |
 |
|||
| F28a | F28 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 46 | 38 | |
| F28b | F28 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 48 | 40 | |
| F28c | F28 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 54 | 46 | |
| F28d | F28 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
45 min [1 h](16) | 55 | 48 | |
| F28e | F28 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 44 | 36 | |
| F28f | F28 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 46 | 39 | |
| F28g | F28 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 51 | 44 | |
| F28h | F28 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
45 min [1 h](16) | 53 | 47 | |
| F28i | F28 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 44 | 36 | |
| F28j | F28 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 46 | 39 | |
| F28k | F28 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 51 | 44 | |
| F28l | F28 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 53 | 47 | |
|
F29 |
• one subfloor layer 11 mm sanded plywood, or OSB or waferboard • one subfloor layer of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood trusses spaced not more than 600 mm o.c. • with or without absorptive material in cavity • resilient metal channels spaced 400 mm or 600 mm o.c. • 1 layer of gypsum board on ceiling side |
 |
|||
| F29a | F29 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
– | 44 | 35 | |
| F29b | F29 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
– | 46 | 37 | |
| F29c | F29 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
30 min |
51 | 43 | |
| F29d | F29 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
– | 53 | 45 | |
| F29e | F29 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
– | 43 | 33 | |
| F29f | F29 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
– | 45 | 36 | |
| F29g | F29 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
– | 50 | 41 | |
| F29h | F29 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
– | 52 | 44 | |
| F29i | F29 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 42 | 34 | |
| F29j | F29 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 44 | 36 | |
| F29k | F29 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 49 | 41 | |
| F29l | F29 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 51 | 44 | |
|
F30 |
• one subfloor layer 11 mm sanded plywood, or OSB or waferboard • one subfloor layer of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood trusses spaced not more than 600 mm o.c. • with or without absorptive material in cavity • resilient metal channels spaced 400 mm or 600 mm o.c. • 2 layers of gypsum board on ceiling side |
 |
|||
| F30a | F30 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 49 | 39 | |
| F30b | F30 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 51 | 42 | |
| F30c | F30 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h [1.5 h](24) | 56 [58](24) | 47 [50](24) | |
| F30d | F30 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
45 min [1 h](16) | 58 | 50 | |
| F30e | F30 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 47 | 38 | |
| F30f | F30 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 49 | 40 | |
| F30g | F30 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 54 | 46 | |
| F30h | F30 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
45 min [1 h](16) | 56 | 48 | |
| F30i | F30 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 47 | 37 | |
| F30j | F30 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 49 | 40 | |
| F30k | F30 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 54 | 45 | |
| F30l | F30 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 56 | 48 | |
|
F31 |
• 25 mm gypsum-concrete topping (at least 44 kg/m2) • subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood trusses spaced not more than 600 mm o.c. • with or without absorptive material in cavity • 1 layer of gypsum board on ceiling side |
 |
|||
| F31a | F31 with • no absorptive material in cavity • 15.9 mm Type X gypsum board |
– | 41 | 17 | |
| F31b | F31 with • absorptive material in cavity • 15.9 mm Type X gypsum board |
– | 43 | 20 | |
| F31c | F31 with • no absorptive material in cavity • 12.7 mm Type X gypsum board |
– | 40 | 17 | |
| F31d | F31 with • absorptive material in cavity • 12.7 mm Type X gypsum board |
– | 42 | 20 | |
| F31e | F31 with • no absorptive material in cavity • 12.7 mm regular gypsum board |
– | 39 | 16 | |
| F31f | F31 with • absorptive material in cavity • 12.7 mm regular gypsum board |
– | 41 | 19 | |
|
F32 |
• 25 mm gypsum-concrete topping (at least 44 kg/m2) • subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood trusses spaced not more than 600 mm o.c. • with or without absorptive material in cavity • 2 layers of gypsum board on ceiling side |
 |
|||
| F32a | F32 with• wood trusses spaced 400 mm o.c. • no absorptive material in cavity • 15.9 mm Type X gypsum board | 1 h | 46 | 20 | |
| F32b | F32 with • wood trusses spaced 600 mm o.c. • no absorptive material in cavity • 15.9 mm Type X gypsum board | 1 h | 47 | 20 | |
| F32c | F32 with• wood trusses spaced 400 mm o.c. • absorptive material in cavity • 15.9 mm Type X gypsum board | 45 min [1 h](13) | 48 | 23 | |
| F32d | F32 with • wood trusses spaced 600 mm o.c. • absorptive material in cavity • 15.9 mm Type X gypsum board | 45 min | 49 | 23 | |
| F32e | F32 with• wood trusses spaced 400 mm o.c. • no absorptive material in cavity • 12.7 mm Type X gypsum board | 1 h | 44 | 19 | |
| F32f | F32 with • wood trusses spaced 600 mm o.c. • no absorptive material in cavity • 12.7 mm Type X gypsum board | 45 min | 45 | 19 | |
| F32g | F32 with • absorptive material in cavity • 12.7 mm Type X gypsum board |
– | 46 | 19 | |
| F32h | F32 with • no absorptive material in cavity • 12.7 mm regular gypsum board |
– | 44 | 19 | |
| F32i | F32 with • absorptive material in cavity • 12.7 mm regular gypsum board |
– | 46 | 22 | |
|
F33 |
• 25 mm gypsum-concrete topping (at least 44 kg/m2) • subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood trusses spaced not more than 600 mm o.c. • with or without absorptive material in cavity • resilient metal channels spaced 400 mm or 600 mm o.c. • 1 layer of gypsum board on ceiling side |
 |
|||
| F33a | F33 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
– | 53 | 26 | |
| F33b | F33 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
– | 55 | 26 | |
| F33c | F33 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
30 min |
60 | 34 | |
| F33d | F33 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
– | 62 | 34 | |
| F33e | F33 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
– | 52 | 26 | |
| F33f | F33 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
– | 54 | 26 | |
| F33g | F33 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
– | 59 | 34 | |
| F33h | F33 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
– | 61 | 34 | |
| F33i | F33 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 51 | 25 | |
| F33j | F33 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 53 | 25 | |
| F33k | F33 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 58 | 33 | |
| F33l | F33 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 60 | 33 | |
|
F34 |
• 25 mm gypsum-concrete topping (at least 44 kg/m2) • subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood trusses spaced not more than 600 mm o.c. • with or without absorptive material in cavity • resilient metal channels spaced 400 mm or 600 mm o.c. • 2 layers of gypsum board on ceiling side |
 |
|||
| F34a | F34 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 57 | 29 | |
| F34b | F34 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 60 | 29 | |
| F34c | F34 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h [1.5 h](24) | 65 [67](24) | 37 | |
| F34d | F34 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
45 min [1 h](16) | 67 | 37 | |
| F34e | F34 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 56 | 28 | |
| F34f | F34 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 58 | 28 | |
| F34g | F34 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 63 | 36 | |
| F34h | F34 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
45 min [1 h](16) | 65 | 36 | |
| F34i | F34 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 56 | 28 | |
| F34j | F34 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 58 | 28 | |
| F34k | F34 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 63 | 36 | |
| F34l | F34 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 65 | 36 | |
|
F35 |
• 38 mm concrete topping (at least 70 kg/m2) • subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood trusses spaced not more than 600 mm o.c. • with or without absorptive material in cavity • 1 layer of gypsum board on ceiling side |
 |
|||
| F35a | F35 with • no absorptive material in cavity • 15.9 mm Type X gypsum board |
– | 45 | 26 | |
| F35b | F35 with • absorptive material in cavity • 15.9 mm Type X gypsum board |
– | 47 | 29 | |
| F35c | F35 with • no absorptive material in cavity • 12.7 mm Type X gypsum board |
– | 43 | 26 | |
| F35d | F35 with • absorptive material in cavity • 12.7 mm Type X gypsum board |
– | 45 | 29 | |
| F35e | F35 with • no absorptive material in cavity • 12.7 mm regular gypsum board |
– | 43 | 26 | |
| F35f | F35 with • absorptive material in cavity • 12.7 mm regular gypsum board |
– | 45 | 29 | |
|
F36 |
• 38 mm concrete topping (at least 70 kg/m2) • subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood trusses spaced not more than 600 mm o.c. • with or without absorptive material in cavity • 2 layers of gypsum board on ceiling side |
 |
|||
| F36a | F36 with• wood trusses spaced 400 mm o.c. • no absorptive material in cavity • 15.9 mm Type X gypsum board | 1 h | 49 | 28 | |
| F36b | F36 with• wood trusses spaced 600 mm o.c.• no absorptive material in cavity• 15.9 mm Type X gypsum board | 1 h | 50 | 28 | |
| F36c | F36 with• wood trusses spaced 400 mm o.c. • absorptive material in cavity • 15.9 mm Type X gypsum board | 45 min [1 h](13) | 51 | 31 | |
| F36d | F36 with • wood trusses spaced 600 mm o.c. • absorptive material in cavity • 15.9 mm Type X gypsum board | 45 min | 52 | 31 | |
| F36e | F36 with• wood trusses spaced 400 mm o.c. • no absorptive material in cavity • 12.7 mm Type X gypsum board | 1 h | 48 | 27 | |
| F36f | F36 with• wood trusses spaced 600 mm o.c.• no absorptive material in cavity• 12.7 mm Type X gypsum board | 45 min | 49 | 27 | |
| F36g | F36 with • absorptive material in cavity • 12.7 mm Type X gypsum board |
– | 50 | 30 | |
| F36h | F36 with • no absorptive material in cavity • 12.7 mm regular gypsum board |
– | 47 | 27 | |
| F36i | F36 with • absorptive material in cavity • 12.7 mm regular gypsum board |
– | 49 | 30 | |
|
F37 |
• 38 mm concrete topping (at least 70 kg/m2) • subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood trusses spaced not more than 600 mm o.c. • with or without absorptive material in cavity • resilient metal channels spaced 400 mm or 600 mm o.c. • 1 layer of gypsum board on ceiling side |
 |
|||
| F37a | F37 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
45 min | 56 | 35 | |
| F37b | F37 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
– | 59 | 35 | |
| F37c | F37 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
30 min |
63 | 43 | |
| F37d | F37 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
– | 66 | 43 | |
| F37e | F37 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
– | 55 | 35 | |
| F37f | F37 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
– | 57 | 35 | |
| F37g | F37 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
– | 62 | 43 | |
| F37h | F37 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
– | 64 | 43 | |
| F37i | F37 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 54 | 35 | |
| F37j | F37 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 57 | 35 | |
| F37k | F37 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 61 | 43 | |
| F37l | F37 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 64 | 43 | |
|
F38 |
• 38 mm concrete topping (at least 70 kg/m2) • subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on wood trusses spaced not more than 600 mm o.c. • with or without absorptive material in cavity • resilient metal channels spaced 400 mm or 600 mm o.c. • 2 layers of gypsum board on ceiling side |
 |
|||
| F38a | F38 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 61 | 37 | |
| F38b | F38 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 63 | 37 | |
| F38c | F38 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h [1.5](24) | 68 [71](24) | 45 | |
| F38d | F38 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 70 | 45 | |
| F38e | F38 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 60 | 36 | |
| F38f | F38 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 62 | 36 | |
| F38g | F38 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 67 | 44 | |
| F38h | F38 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 69 | 44 | |
| F38i | F38 with • no absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 59 | 36 | |
| F38j | F38 with • no absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 61 | 36 | |
| F38k | F38 with • absorptive material in cavity • resilient metal channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 66 | 44 | |
| F38l | F38 with • absorptive material in cavity • resilient metal channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 68 | 44 | |
|
Cold Formed Steel Floor Joists(25) |
F39 |
• subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on steel joists spaced not more than 600 mm o.c. • with or without absorptive material in cavity • 1 layer of gypsum board on ceiling side |
 |
||
| F39a | F39 with • no absorptive material in cavity • 15.9 mm Type X gypsum board |
– | 29 | 27 | |
| F39b | F39 with • absorptive material in cavity • 15.9 mm Type X gypsum board |
– | 31 | 30 | |
| F39c | F39 with • no absorptive material in cavity • 12.7 mm Type X gypsum board |
– | 27 | 26 | |
| F39d | F39 with • absorptive material in cavity • 12.7 mm Type X gypsum board |
– | 29 | 29 | |
| F39e | F39 with • no absorptive material in cavity • 12.7 mm regular gypsum board |
– | 27 | 25 | |
| F39f | F39 with • absorptive material in cavity • 12.7 mm regular gypsum board |
– | 29 | 28 | |
|
F40 |
• subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on steel joists spaced not more than 600 mm o.c. • with or without absorptive material in cavity • 2 layers of gypsum board on ceiling side |
 |
|||
| F40a | F40 with• steel joists spaced 400 mm o.c. • no absorptive material in cavity • 15.9 mm Type X gypsum board | 1 h | 34 | 31 | |
| F40b | F40 with• steel joists spaced 600 mm o.c.• no absorptive material in cavity• 15.9 mm Type X gypsum board | 45 min | 35 | 31 | |
| F40c | F40 with• steel joists spaced 400 mm o.c. • absorptive material in cavity • 15.9 mm Type X gypsum board | 45 min | 36 | 34 | |
| F40d | F40 with• steel joists spaced 600 mm o.c. • absorptive material in cavity • 15.9 mm Type X gypsum board | 45 min | 37 | 34 | |
| F40e | F40 with• steel joists spaced 400 mm o.c. • no absorptive material in cavity • 12.7 mm Type X gypsum board | 1 h | 32 | 30 | |
| F40f | F40 with • steel joists spaced 600 mm o.c. • no absorptive material in cavity • 12.7 mm Type X gypsum board | 45 min | 33 | 30 | |
| F40g | F40 with• steel joists spaced 400 mm o.c. • absorptive material in cavity • 12.7 mm Type X gypsum board | 45 min | 34 | 33 | |
| F40h | F40 with • steel joists spaced 600 mm o.c. • absorptive material in cavity • 12.7 mm Type X gypsum board | 45 min | 35 | 33 | |
| F40i | F40 with • no absorptive material in cavity • 12.7 mm regular gypsum board |
– | 31 | 30 | |
| F40j | F40 with • absorptive material in cavity • 12.7 mm regular gypsum board |
– | 33 | 33 | |
|
F41 |
• subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on steel joists spaced not more than 600 mm o.c. • with or without absorptive material in cavity • steel furring channels spaced 400 mm or 600 mm o.c.• 1 layer of gypsum board on ceiling side |  |
|||
| F41a | F41 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
– | 34 | 27 | |
| F41b | F41 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
– | 37 | 30 | |
| F41c | F41 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
30 min |
37 | 30 | |
| F41d | F41 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board |
30 min |
40 | 33 | |
| F41e | F41 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
– | 33 | 26 | |
| F41f | F41 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
– | 35 | 29 | |
| F41g | F41 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
30 min |
36 | 29 | |
| F41h | F41 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board |
30 min | 38 | 32 | |
| F41i | F41 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
< 30 min | 32 | 25 | |
| F41j | F41 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
< 30 min | 35 | 28 | |
| F41k | F41 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
< 30 min | 35 | 28 | |
| F41l | F41 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
< 30 min | 38 | 31 | |
|
F42 |
• subfloor of 15.5 mm plywood, OSB or waferboard, or 17 mm tongue and groove lumber • on steel joists spaced not more than 600 mm o.c. • with or without absorptive material in cavity • steel furring channels spaced 400 mm or 600 mm o.c.• 2 layers of gypsum board on ceiling side |  |
|||
| F42a | F42 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 39 | 32 | |
| F42b | F42 with• steel joists spaced 400 mm o.c. • no absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board | 45 min | 42 | 34 | |
| F42c | F42 with • steel joists spaced 600 mm o.c. • no absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board | 45 min | 43 | 34 | |
| F42d | F42 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 15.9 mm Type X gypsum board |
1 h | 42 | 35 | |
| F42e | F42 with• steel joists spaced 400 mm o.c. • absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board | 45 min [1 h](26) | 45 | 37 | |
| F42f | F42 with • steel joists spaced 600 mm o.c. • absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 15.9 mm Type X gypsum board | 45 min [1 h](13) | 46 | 37 | |
| F42g | F42 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 38 | 30 | |
| F42h | F42 with• steel joists spaced 400 mm o.c. • no absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board | 45 min | 40 | 33 | |
| F42i | F42 with • steel joists spaced 600 mm o.c. • no absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board | 45 min | 41 | 33 | |
| F42j | F42 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm Type X gypsum board |
1 h | 41 | 33 | |
| F42k | F42 with• steel joists spaced 400 mm o.c. • absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board | 45 min [1 h](26) | 43 | 36 | |
| F42l | F42 with • steel joists spaced 600 mm o.c. • absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm Type X gypsum board | 45 min [1 h](13) | 44 | 36 | |
| F42m | F42 with • no absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 37 | 30 | |
| F42n | F42 with • no absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 39 | 33 | |
| F42o | F42 with • absorptive material in cavity • steel furring channels spaced 400 mm o.c. • 12.7 mm regular gypsum board |
– | 40 | 33 | |
| F42p | F42 with • absorptive material in cavity • steel furring channels spaced 600 mm o.c. • 12.7 mm regular gypsum board |
– | 42 | 36 | |