Sound Transmission Classification (STC) numbers have been adopted by acoustical engineers as a measure of resistance of a building element such as a door or wall to the passage of audible sounds. Audible sounds are defined as voice, music, or any other noises not related to impact sound.
STC rated doors are available in all standard panel raise and sticking options and all face colors.
Our doors are tested to obtain the following ratings per ASTM E90-90 as conducted and certified by Intertek Testing Services.
Ratings can only be achieved using approved accessories listed below and within maximum door dimensions.
Kits can be supplied in one of two ways:1. Head and jamb seals and a fully mortised automatic door bottom.2. Head and jamb seals, an automatic door bottom and an approved threshold.
Approved Zero Accessories: Head and jamb seals Model 475 (specify finish), Auto door bottom Model 369, Threshold Not required but are available
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