A fire door refers to a door that can meet the requirements of fire resistance stability, integrity, and heat insulation within a certain period of time. It is a fire-resistant partition with a certain fire resistance rating, installed in fire compartment divisions, evacuation stairwells, vertical shafts, and other locations.

     In addition to the functions of ordinary doors, fire doors also play a key role in preventing the spread of fire and smoke. They can block the spread of fire for a certain period, ensuring the safe evacuation of personnel.