1) Sound 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 Insulation in Buildings.”(See Appendix A.)
2) Acceptable acoustical sealant shall be provided for walls, ceilings and floors, in order to maintain the required STC rating and the sealant used for this purpose shall conform to CAN/CSGB-19.21, "Sealing and Bedding Compound, Acoustical.
1) Except as provided in Sentence (2), 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-22.214.171.124. in Appendix A.
2) Where 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-126.96.36.199. in Appendix A.