what are noise ratings for metal doors

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STC stands for Sound Transmission Class. An STC (Sound Transmission Class) is a single number rating system derived from measured values of sound transmission loss in accordance with ASTM E90 and...
Yes, wood doors can be used and installed in most hollow metal frame applications including FE-Series and DE-Series Double Egress frames. Caution - For fire rated applications the wood door manufa...
Decorative metal panels can only be attached if the panel manufacturer is UL listed in UL’s category GVUZ. All installation, sizes and hourly ratings are in accordance with that manufacturers” ...
Steelcraft have tested different types of doors and frame assemblies using Zero International gasket seals for the various STC ratings. Tests are in accordance to ASTM...
Frames can be installed either KD (knock down) or welded to receive the STC rating.
Steelcraft borrowed light frames are not listed/tested. Check with the glass manufacture if they are listed and with what type of framing used.
Sound seals are required. Zero International Gasket Notes: Perimeter Seals – Zero #475 applies to the stop of the head and jambs. Door bottom – Zero #367, surface applied. Threshold ...
With the SUS connected to the AD400, in the EDIT tab there are radio communication settings "FIRST/DELAY/RETRY." FIRST - Is the first delay after the initial transmission of credential data, befor...
AD400 factory default settings when shipped are FIRST = 300 (m sec), DELAY = 200 (m sec) and RETRY = 5  
To change FIRST/DELAY/RETRY connect and couple the SUS/HHD to the AD400 and find under the EDIT tab the FIRST/DELAY/RETRY settings. See notes Or connect the SUS/HHD t...