Fire-rated doors help reduce the spread of fire and smoke in a home or building. Both commercial and residential structures can use fire-rated doors. Fire door materials and parts Fire doors can consist of a combination of materials: gypsum, steel, timber, Vermiculite, aluminum and glass. Both the slab and the door frame must meet requirements to earn a fire-rating. The door frame parts include seals, hardware and the structure. On an even more granular level here is a breakdown of elements: Seals Door hardware Standards for fire-rated doors If a window is present,it must have a rating as well. Fire-rated glass may contain wire mesh glass, liquid sodium silicate, ceramic glass or borosilicate glass. Wired glass typically withstands the fire. The sodium silicate liquid acts to insulate heat transfer. The National Fire Protection Association (NFPA) 80 standard regulates the installation and maintenance of assemblies and devices used to protect openings in walls,…