(1)
Except as provided in Sentence (3), a dwelling unit and a suite in hotels shall be separated from every other space in a building in which noise may be generated by
(a)
a separating assembly and adjoining constructions, which, together, provide an apparent sound transmission class (ASTC) rating of not less than 47, or
(b)
a separating assembly that provides a sound transmission class (STC) rating of at least 50 and adjoining constructions that conforms to Article 9.11.1.4. (See Note A-9.11.1.4.)
(2)
Reserved.
(3)
Construction separating a dwelling unit or suite in a hotel from an elevator shaft or refuse chute shall have an STC rating of not less than 55.