9.11.2.1.(3)

Intent 1:

To limit the probability that occupants will be exposed to excessive levels of airborne noise from elevator shafts or refuse chutes, which could lead to negative effects on the psychological well-being of persons.

Intent 2:

To supersede the requirement stated in Sentence (1), in situations where dwelling units are adjacent to an elevator shaft or a refuse chute.

Intent 3:

To direct Code users to:

• Subsection 9.11.1., which refers to standardized methods of establishing the sound transmission class ratings of wall, floor and ceiling assemblies, and
• a series of tables in Appendix A-9.10.3.1., which list the sound transmission class ratings assigned to a selection of wall, floor and ceiling assemblies.