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The key structure of fire doors
Jan 23,2026
Door frame and leaf: made of galvanized steel sheet or flame-retardant wood, filled with fire-resistant expansion material inside.
Fireproof sealing strip: When exposed to high temperature, it expands and fills the door gap to prevent smoke from penetrating.
Door closer: Ensure automatic door closure to prevent fire failure caused by human negligence.
Sequencer (for double doors only): Ensure that the two doors are closed in sequence to avoid gaps.
Fireproof lock: resistant to high temperatures, preventing lock failure in case of fire.
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1305 North Building, Twin Towers, Taida, Cangzhou City, Hebei Province
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Professional manufacturer of high-quality doors, windows and hardware from Hebei, China. We specialize in fireproof doors, security doors, aluminum systems and related products for global markets.
