Air-borne sound insulation for wall and floor-ceiling assemblies shall meet a Sound Transmission Class (STC) rating of 45 when tested in accordance with ASTM E 90. Penetrations or openings in construction assemblies for piping; electrical devices; recessed cabinets; bathtubs; soffits; or heating, ventilating or exhaust ducts shall be sealed, lined, insulated or otherwise treated to maintain the required ratings. Dwelling unit entrance doors, which share a common space, shall be tight fitting to the frame and sill.
|ASTM E 90—04 Test Method for Laboratory |
Measurement of Airborne Sound Transmission
Loss of Building Partitions and Elements
|ASTM E 492—04 Specification for |
Laboratory Measurement of Impact Sound
Transmission through Floor-ceiling Assemblies
Using the Tapping Machine