Until now, there have been no sound-rated access panels tested and rated to maintain the STC value desired in a wall. JL Industries has developed and tested a new access panel with an STC rating up to 47 for use in sound-rated wall assemblies. The patent-pending STC series can provide sound isolation wherever access to critical building components in walls is needed and still meet the sound-isolation requirements for schools, Group R Occupancies and health-care facilities.
The STC panels have been independently tested to maintain an STC value up to 47, by Intertek, a nationally recognized testing laboratory in accordance with ASTM E90-09 for sound transmission loss of building partitions. These access doors are classified in accordance with ASTM E413-10 (rating sound insulation of partitions) and E1332-10a (outdoor/indoor sound attenuation).
Featuring a proprietary sound-blocking assembly and continuous gasketing, the STC panels are available in sizes from 12 by 12 inch to 24 by 36 inches. The frame and door are constructed of cold rolled steel with a durable powder-coat primer finish, heavy-duty continuous hinge and compression paddle latch for a tight gasket seal. Options include stainless or galvanneal steel construction, and several latch selections.
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