By National Fire Protection Association.; American National Standards Institute

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Extra resources for NFPA 80, Fire doors and fire windows

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5 The clearance between the door and the sill should not exceed 3/8 in. 53 mm). 1 The selected design should be as simple and direct in operation as possible and should provide reliable performance. Emphasis should be on fail-safe operation. , trolley track, chain, supports) that pass through the opening should incorporate self-releasing features. , conveyor, conveyed material) to the door closure is positively and permanently (until manually reset) removed from the door’s path before the door is released to close.

E-1 New and existing fire doors are classified by one of the following designation systems: (a) (b) (c) (d) Hourly rating designation Alphabetical letter designation A combination of both (a) and (b) For horizontal access doors, a special listing indicating the fire–rated floor or floor–ceiling or roof-ceiling assemblies for which the door may be permitted to be used E-2 The hourly designation indicates the duration of the fire test exposure and is known as the fire protection rating. Fire protection ratings of fire doors meeting this standard should be as determined and reported by a testing agency in accordance with NFPA 252, Standard Methods of Fire Tests of Door Assemblies.

1999 Edition 80–32 FIRE DOORS AND FIRE WINDOWS Fire door guide hardware Structural frame 8 × Bolt ø minimum Expansion bolt 6 × Bolt ø minimum Figure B-10 Unusually thick walls. Figure B-14 Concealed-type stay roll. Structural frame where installed Line of opening ⁵⁄₈-in. (16-mm) machine or wall bolt Through-bolts to angle on far side of wall Front view Figure B-11 Stay roll. Figure B-15(a) Concealed-type stay roll. Structural frame Figure B-15(b) Stay roll. Figure B-12 Stay roll. Figure B-13 Stay roll.

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