Division B
Acceptable Solutions

Part 9 — Housing and Small Buildings

Section 9.11. Sound Control

9.11.1. Sound Transmission Class Rating (Airborne Sound)

9.11.1.1. Determination of Sound Transmission Class Ratings
1) Intent StatementSound transmission class ratings shall be determined in accordance with ASTM E 413, “Classification for Rating Sound Insulation,” using results from measurements in accordance with
a) ASTM E 90, “Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements,” or
b) ASTM E 336, “Measurement of Airborne Sound Attenuation between Rooms in Buildings.”
(See Appendix A.)

9.11.2. Required Sound Control Locations (Airborne Sound)

9.11.2.1. Minimum Sound Transmission Class Ratings
1) Except as provided in change beginSentence (3)change end, every dwelling unit shall be separated from every other space in a building in which noise may be generated by a construction providing a sound transmission class rating of at least 50, measured in accordance with Subsection 9.11.1. or as listed in A-9.10.3.1. in Appendix A.

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2) change beginReserved.change end

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3) Intent StatementWhere a dwelling unit is adjacent to an elevator shaft or a refuse chute, the separating construction shall have a sound transmission class rating of at least 55, measured in accordance with Subsection 9.11.1. or as listed in A-9.10.3.1. in Appendix A.