The composition and structure of fire doors

Fire doors are generally located in the following areas.

1. Enclosed evacuation stairs leading to corridors; Enclosed elevator lobby, doors leading to the front room and the front room leading to the aisle.

2. Inspection doors for vertical pipeline shafts such as cable shafts, pipeline shafts, smoke exhaust ducts, and garbage chutes.

3. Divide fire zones and control the fire walls and doors on the fire partition walls set up to control the building area of the zones. When it is difficult to install firewalls or fire doors in buildings, fire-resistant rolling shutter doors should be used instead, and water curtains should be used for protection.

4. Standard (such as GB50016-2014 "Code for Fire Protection Design of Buildings") or design special requirements for fire and smoke prevention of partition walls and household doors.

For example, the partition doors of equipment rooms (cylinder rooms, foam stations, etc.) attached with fixed fire extinguishing devices in high-rise civil buildings, ventilation, air conditioning rooms, etc. should be Class A fireproof doors; The doors on the partition walls of basement rooms where people often stay or there are many combustibles should use Class A fire doors; Due to limitations in conditions, it is necessary to install oil and gas boilers, oil immersed power transformers, high-voltage capacitors and switches filled with oil in high-rise buildings, and doors on the partition walls of dedicated rooms should all use Class A fire doors. There are also partition doors with special design requirements that require fire prevention, such as partition doors for fire monitoring command centers, archive rooms, valuable item warehouses, etc., usually using Class A or Class B fire doors. The partition doors of high-rise residential buildings often use fire-resistant and anti-theft doors.

Fire doors are an important component of firefighting equipment and a crucial part of social fire prevention. Fire doors should be equipped with fire door closers or door closing devices that allow normally open doors to automatically close in the event of a fire (except for special areas such as pipeline well doors). That is to say, except for some special parts such as pipeline well doors that do not require the installation of door closers, all other parts require the installation of fire door closers.