What are the classifications of fire doors?
Fire doors are the first line of defense to ensure the safety of life in the event of a fire. Because of their flame-retardant materials and smoke barriers, they can prevent the spread of fire and the spread of smoke, ensuring the safe evacuation of personnel. They are generally installed in evacuation stairwells and anterooms. , walkways, vertical shafts, fire partitions, etc.
There are actually many types of fire doors.
According to material
There are wooden fire doors, steel fire doors, steel wood fire doors, and other fire doors;
Wooden fire door
Use non-combustible wood or flame-retardant wood products as door frames, door leaf skeletons, door leaf panels, if the door leaf is filled with material, it shall be filled with non-toxic and harmless fireproof and heat insulation materials, and be equipped with fireproof hardware fittings with certain fireproof Performance of the door.
Steel fire door
The door frames, door leaf skeletons and door leaf panels are made of steel materials. If the door leaf is filled with materials, it is filled with fire-proof heat insulation materials that are non-toxic and harmless to the human body, and is equipped with fireproof hardware fittings with doors with certain fire resistance properties.
Steel wood fire door
Manufacture of door frame, door leaf skeleton and door leaf panel with steel and flame-retardant wood material or fire-retardant wood products. If the door leaf is filled with material, it shall be filled with non-toxic and harmless fireproof and heat insulation material and be equipped with fireproof hardware fittings. The door with a certain fire resistance.
Other materials fire doors
The use of inorganic non-combustible materials other than steel, flame-retardant wood, or flame-retardant wood products, or the use of steel, flame-retardant wood, or flame-retardant wood products for the manufacture of door frames, door leaf skeletons, or door leaf panels. If the door leaf is filled with material, it is filled. Non-toxic and non-hazardous fire-proof and heat-insulating materials for human bodies, and equipped with fire-proof hardware fittings with doors with certain fire resistance properties.
By use function
There are access control fire doors, indoor fire doors, explosion-proof fire doors, quick-lock fire doors, and quick fire doors in case of fire;
Electronic fire doors, built-in fire door closers, multi-function fire doors, etc.;
According to the open state is divided into normally closed fire doors and normally open fire doors. Normally closed fire doors are generally composed of fire doors, door frames, door closers, seals, etc. Double-fan or multi-door fire doors are also equipped with sequencers. Normally closed fire doors usually do not require electrical automation to provide self-controlled design, but there are also some special circumstances such as: normally closed fire doors on evacuation passages, when some large construction parties have the requirements of management such as anti-theft, they should be designed by electrical professional cooperation. It may reduce security risks comprehensively. For the normally open fire doors, besides all the accessories with normally closed fire doors, the fire door release switch must be added, and the electrical design must be provided by the electrical professional. It is usually applied to evacuation routes where there are many flows of people.