The Ontario Building Code | Minimum Sound Transmission Class Ratings

9.11.2.1. Minimum Sound Transmission Class Ratings

(1) Except as provided in Sentence (2), every dwelling unitand every suite in hotelsshall be separated from every other space in a buildingin which noise may be generated, by an assembly providing a sound transmission class rating of at least 50, measured in accordance with Subsection 9.11.1. or as listed in Tables 1 and 2 of MMAH Supplementary Standard SB-3, "Fire and Sound Resistance of Building Assemblies".

(2) Where a dwelling unit or suitein a hotel is adjacent to an elevator shaft or a refuse chute, the separating assembly shall have a sound transmission class rating of at least 55, measured in accordance with Subsection 9.11.1. or as listed in Tables 1 and 2 of MMAH Supplementary Standard SB-3, "Fire and Sound Resistance of Building Assemblies".