By National Fire Protection Association.; American National Standards Institute
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Extra info for NFPA 80, Fire doors and fire windows
These materials were originally intended to be used as a substitute for fire-resistive walls where large areas of glazing were required or desirable. These glazing materials actually achieve a fire resistance rating as compared to a glazing material, which achieves only a fire protection rating as defined in this standard. These glazing materials may be permitted to be used as a component of a fire door assembly to meet the fire performance requirements for a fire door rather than as a glazing material installed in a fire door.
1 Labels may be permitted to be of metal, paper, or plastics or may be permitted to be stamped or diecast into the item. 1 Doors are of several classifications, types, and methods of operation. Fire door assemblies consist of individually labeled components that are essential to the satisfactory performance of the complete assembly. Some labels cover one or more components in addition to the door. 3 Testing laboratories might provide a label or certificate of inspection for door assemblies larger than the maximum size indicated in the manufacturer’s fire door listing.
Short section of hinged conveyor also released to allow passage of door. Figure C-4 Method of stopping stock on a gravity roller conveyor. Conveyor section raised by counterweight and interrupts stock. Door held until section opens. Fire door Stock Stock Stock Belt conveyor Fire wall Cat whisker-type switch or photoelectric switch Electromagnetic fire door release interlock with switch that stops conveyor with proper spacing of stock to prevent obstruction to door closer. Figure C-2 Protection of opening where belt conveyor can be interrupted.