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“ three hour rated pair ”

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Resolution: Communicating Frames are hollow metal frame fabricated such that a door is installed in each rabbet of a double rabbeted frame (2 doors total) to facilitate dual access and control of the opening, ...:

What strike do I use with a Von Duprin rim device on a pair of doors with flush bolts?

Resolution: NON Fire Rated doors would use the 1609 strike applied to the inactive leaf with flushbolts. This may NOT be used on Fire Rated openings.:

Are astragals required on 3 hour rated pairs of doors?

Resolution: All 3 hour fire rated pairs of doors do require an astragal when used without a removable hardware mullion. Pairs of doors with removable hardware mullions are treated and listed as 2 single doors...:

Can a 3 hour A labeled Fire Door be prepped for multiple glass lights?

Resolution: A fire rated door for 3 hours can have one glass light maximum: 100 square inches and must have an approved glass (Firelite type) Max glass size cannot exceed 12" in width or 33" in height. Wi...:

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...:

Are astragals required on fire doors?

Resolution: Astragals are required on: 3 hour fire rated pairs: Double doors - swinging in the same direction Double Egress - swinging in opposite directions Fire rated Dutch Doors Fire rated 1 3/4" t...: