1. Requirements of the door frame:
Fire-resistant door frames and door leaf panels should be made of steel materials with performance not lower than cold-rolled thin steel plates, and cold-rolled thin steel plates should meet the requirements of GB/T 708.
The reinforcement used for fire doors can be made of steel materials with a performance not lower than that of hot-rolled steel, and the hot-rolled steel should meet the requirements of GB/T 709.
2. Other materials
1. Other materials used in fire doors should be non-toxic and harmless to the human body, and should be tested by a nationally recognized and authorized testing agency to meet the requirements of GB/T 20285-2006 for smoke toxicity hazard classification ZA2.
2. Other materials used in fire doors should be inspected by a nationally recognized and authorized testing agency to meet the flame retardancy requirements specified in Chapter 7 of GB/T 8625-2005 or the combustion performance A1 requirements specified in GB 8624-2006, and their mechanical properties should meet the relevant standards. Relevant regulations and meet the relevant requirements for the production of fire doors.
