Division B
Acceptable Solutions

Part 5 — Environmental Separation

Section 5.9. Sound Transmission

(See Appendix A and Part 10.)

(See Appendix A.)

5.9.1. Protection from Noise

5.9.1.1. Sound Transmission Class

Sound transmission class ratings shall be determined in accordance with ASTM E 413, “Classification for Rating Sound Insulation,” using the results from measurements carried out 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.)

5.9.1.2. Required Protection from Noise

1) Except as provided in Sentence (2), a dwelling unit shall be separated from every other space in a building in which noise may be generated by construction providing a sound transmission class rating not less than 50, measured in accordance with the standards referenced in Sentence 5.9.1.1.(1). (See A-9.11.1.1.(1) in Appendix A.)

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2) Construction separating a dwelling unit from an elevator hoistway or a refuse chute shall have a sound transmission class rating not less than 55, measured in accordance with the standards referenced in Sentence 5.9.1.1.(1).