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“ sound rated doors ”

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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...:

The Von Duprin 98 or 99 ALK kit will not sound the horn

Resolution: Followings are the reason for 98/99 exit alarm ALK not sound when push bar is activated. Make sure key switch on exit alarm ALK is turned on, wait for 20 seconds before you activating the pushba...:

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...:

Can the electric strike be used with a vertical rod device on a fire-rated door?

Resolution: Not for use in fire rated openings.:

What is the maximum glass light size on a 3 hour (180 minute) fire rated door?

Resolution: Maximum glass light sizes for 3 hour fire doors is as follows: Wire glass - not approved for use in 3 hour fire doors. Ceramic glass: UL & ITS/WH allow one (1) light with 100 square inc...: