1. Steel fire doors refer to doors that use cold-rolled thin steel plates as door frames, door panels, and skeletons, fill non-combustible materials inside the door leaf, and are equipped with hardware that can meet the requirements of fire resistance stability, integrity, and heat insulation. .
2. Distinguish according to the number of doors: steel single-leaf fire doors and steel double-leaf fire doors. According to the structure of the door leaf: steel fireproof door with glass, steel fireproof door without glass, steel fireproof door with bright window and steel fireproof door without bright window. Classified by fire resistance: Class A fire doors, Class B fire doors, and Class C fire doors.
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