Fire doors, as important facilities for fire separation in buildings, can effectively prevent the spread of fire and smoke when a fire occurs, and buy precious time for personnel evacuation and rescue. The rationality and stability of its structure are directly related to the effectiveness of fire prevention.
Fire doors are mainly composed of door frames, door leaves and various fireproof hardware accessories. The door frame is the skeleton of the fire door, usually made of steel to ensure its durability. The function of the door frame is to support and fix the door leaf, and at the same time, it is closely connected to the wall to form a fire barrier.
The door leaf is the main part of the fire door, which undertakes multiple functions such as opening and closing the door, as well as fire insulation, heat insulation, sound insulation, and smoke prevention. The door leaf is usually made of steel, steel-wood composite or stainless steel, which have good fire resistance and strength. The door leaf is filled with fireproof and heat-insulating materials to further enhance its heat insulation performance.
In addition to door frames and door leaves, fire doors also include various fireproof hardware accessories, such as fireproof locks, fireproof hinges, door closers, sequencers, etc. These accessories play a vital role in the use of fireproof doors. For example, fireproof locks can ensure that the door leaves are tightly closed in the event of a fire to prevent the spread of fire; door closers can automatically close the door leaves after the door leaves are opened to keep the fire doors in a normally closed state.
The sealing performance of fireproof doors is also an important consideration in their structural design. Sealing strips are installed between the door leaves and the door frames, usually made of materials such as rubber and silicone rubber. These sealing strips can fit tightly when the door leaves are closed, isolating flames, smoke and heat, and ensuring the sealing performance of fireproof doors.
The structural design of fireproof doors also needs to consider installation convenience and ease of use. For example, normally open fire doors should be able to close automatically in the event of a fire and have a signal feedback function; normally closed fire doors should be equipped with automatic door closers and sequencers to ensure that the door leaves remain closed at ordinary times.
In short, the structural design of fire doors must take into account multiple factors such as fire resistance, structural stability, and ease of use to ensure that they can play their due role when a fire occurs.