Classification of fire doors
There are many types of fire doors.
According to the material: there are wooden fire doors, steel fire doors, steel wood fire doors, other fire doors, etc.;
wooden fire door
Use refractory wood or refractory wood products for door frame, door leaf frame, door leaf panel.
Steel fire door
The door frame, door leaf frame and door leaf panel are made of steel materials. If the door leaf is filled with materials, it should be filled with non-toxic and harmless fire-proof and heat-insulating materials, and a door with certain fire-resistant performance composed of fire-proof hardware accessories.
Steel wood fire door
Use steel and fire-resistant wood materials or fire-resistant wood products to make door frames, door leaf frames, door leaf panels.
Fire doors of other materials
Inorganic and non-combustible materials other than steel, fire-resistant wood or fire-resistant wood products are used, or steel, fire-resistant wood and fire-resistant wood products are used to make door frames, door leaf frames, and door leaf panels. It is a non-toxic and harmless fire-proof and heat-insulating material and a door with certain fire-resistant performance composed of fire-proof hardware accessories.
Use functions: there are access control fire doors, indoor fire doors, explosion-proof fire doors, quick-lock fire doors, quick-open fire doors in case of fire, etc.;
According to technology: there are electronic fire doors, built-in fire door closers, multi-function fire doors, etc.;
According to the open state, it 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, sealing strips, etc. Double or multiple normally closed fire doors are also equipped with sequencers. Normally closed fire doors do not usually require electrical professionals to provide automatic control design, but there are also special cases such as: normally closed fire doors on evacuation passages, when some large-scale construction parties have management requirements such as anti-theft, they should be designed by electrical professionals. It is possible to reduce security risks in an all-round way. For the normally open fire door, in addition to all the accessories of the normally closed fire door, the fire door release switch must be added, and the self-control design must be provided by the electrical professional. It is usually applied to evacuation passages with a lot of flow of people.