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“ Sound Transmission Class ”

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Resolution: 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...:

SOUND RETARDANT

Resolution: Sound Transmission Class; STC:

What is a Cam Lift Hinge?

Resolution: Cam Lift Hinges are specially designed hinges used mainly on acoustical door assemblies. The Cam Lift Hinge lifts the door during its travel and seats the door bottom for a pos...:

What is an astragal?

Resolution: An Astragal is an applied molding attached most commonly to the meeting edge of doors to: Protection against weather conditions Minimize the passage of light between the doors Retard the passa...:

What Steelcraft products have been tested in accordance with SDI's Acoustical Testing Standard #SDI 114?

Resolution: SDI 114 is no longer published as an SDI performance standard. The new SDI standard for acoustical Performance is SDI 128-09Steelcraft does offer products that have been tested in accordance with S...:

Why won't my HHD connect to the AD300 lock?

Resolution: If the AD300 power is not correctly connected it may not communicate or other wise function correctly.The AD-Series locks must be hard wire powered through the comm board. It is not com...:

On which closer is the fusible link arm available?

Resolution: The Fusible Link arm is available with the 4010, 4020 and 4110 series closers. They all use the same Fusible Link arm. The UL Listing number is for the Fusible Link arms is R1943.The 4010 Series ca...:

Can the credential reader be changed on a CO-Series lockset?

Resolution: A Credential Reader MAY be replaced with another Credential Reader of the same type; however, a Factory Default Reset must be performed before the lock will function properly.:

Can an 18-R-L be converted to L-NL function in the field?

Resolution: Follow step 6 of the 18-R instructions to convert trim function to Night Latch(L-NL).: