Technical specifications for fire-resistant doors

Fire-resistant doors include steel, glass, stainless steel, and wooden options, categorized into Class A, B, and C.

The inner filling material of fire-resistant doors is non-flammable or flame-retardant lightweight fire-resistant profiles, usually filled with perlite boards.

The door leaf steel thickness of fire-resistant doors is not less than 0.8mm, and the door frame steel thickness is not less than 1.2mm, with the specific thickness depending on the fire-resistant door grade.

Fire-resistant doors must pass inspection by the "National Supervision and Inspection Center for Fixed Fire Extinguishing Systems and Fire-Resistant Components."