Wooden fire doors are constructed using fire-retardant wood or fire-retardant wood products for the door frame, door leaf skeleton, and door leaf panel. If the door leaf is filled with material, it must be filled with a non-toxic and harmless fire-resistant and heat-insulating material, and fitted with fire-resistant hardware to form a door with a certain degree of fire resistance.
The overlap between the door leaf and the door frame should not be less than 12mm; the clearance between the door leaf and the door frame on the hinged side should not exceed the dimensional tolerance specified in the design drawings; the clearance between the door leaf and the door frame on the lockd side should not exceed the dimensional tolerance specified in the design drawings; the clearance between the door leaf and the top frame should not exceed 3mm; the gap between the door leaves of double-leaf and multi-leaf doors should not exceed 3mm; the clearance between the door leaf and the bottom frame or the ground should not exceed 9mm; the gap between the mating surfaces of the door leaf and the door frame: the gap between the mating surfaces of the door leaf and the door frame on the hinged side, the lockd side, and the top frame should not exceed 3mm; the height difference between the door leaf and the door frame: on the opening surface of the fire door, the height difference between the door frame and the door leaf should not exceed 1mm.
Wooden fire doors refer to doors whose door frames, door leaf skeletons, and door leaf panels are made of wood or wood products, and whose fire resistance rating meets national standards. Small deviations between wooden fire doors are unacceptable; even a small detail may prevent them from meeting national standards.
