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“
LIGHT SIZES FOR FIRE RATED OPENINGS
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RELATED FAQS
Question
Answer
What is the maximum glass light size available on a 20 minute sidelight frame?
Resolution:
On fire rated transom and/or sidelight frames and fire rated window frames, Steelcraft labeling procedures only control the O/A width and/or height of the frames based on wall condition. The amount...:
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...:
What is the maximum glass light size on a 90 min (1 1/2 hour) fire rated door?
Resolution:
Standard listed wire glass: one (1) light with 100 in2 per door leaf max.Firelite or other appropriately listed glass:• FM maintains one (1) light with 100 in2 per door leaf max.• UL &...:
What fire ratings are available on DW-Series Borrowed Lights?
Resolution:
DW-Series Fire Rated Borrowed Lights are available in the following sizes: 60 minute (1 hour) rating = 2721 square inches of visible glass. maximum frame rabbet to rabbet dimensions = 78 1/4...:
What is the rough opening in walls for frame installations?
Resolution:
For DW, K three sided frames and four sided borrowed light frames: Three sided frame = door opening width (order size) plus 1 1/2" minimum to 2" maximum and the door opening hei...:
What is the max rating available on an full glass (FG) door?
Resolution:
A UL 20 minute fire rating is the maximum fire rating for a Full Glass (FG) door design. A14-Series door construction: Max fire rating is 20 minute. UL label only FG must use Over-Lapping Stee...:
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 ASTM E-119?
Resolution:
ASTM E-119 is a test standard for walls, partitions and floor or roof systems: This test standard is also used for ceramic type glasses when used as window wall and/or borrowed light frames.As...:
Can fire rated double egress frames have side lights or transoms?
Resolution:
No. Fire rated double egress frames must be a stand alone 3 sided frame assembly. If transom lights and/or sidelights are required, they must be built and installed as separate Fire Window assemb...: