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 E90. 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 E90—04||Test Method for Laboratory Measurement of Air-borne Sound Transmission Loss of Building Partitions and Elements||AK102|
|ASTM E492—09||Specification for Laboratory Measurement of Impact Sound Transmission through Floor-ceiling Assemblies Using the Tapping Machine||AK103|
|The Masonry Society|
|TMS 0302—12||Standard for Determining the Sound Transmission Class Rating for Masonry Walls||AK102.1.1|