Analysis of factors affecting fire resistance of fire door

Fire door refers to the door that can meet the requirements of fire resistance, stability, routine and thermal insulation within a certain period of time. It is a fire partition with certain fire resistance, such as fire compartment, evacuation staircase and vertical shaft. In addition to the function of ordinary door, it also has the function of preventing the diffusion of fire and smoke, which can ensure the evacuation of personnel within a certain time.

According to the materials, it can be divided into four categories: wooden fire doors, steel fire doors, steel wood fire doors and fire doors of other materials; According to the thermal insulation performance, it can be divided into: thermal insulation fireproof door (Class A), partial thermal insulation fireproof door (class B) and non thermal insulation fireproof door (Class C). The thermal insulation fireproof door is divided into class A (fire resistance time 1.50h), B (fire resistance time 1.00h) and C (fire resistance time 0.50) according to its fire resistance performance. H)。

Wooden fire door: use flame retardant wood or flame retardant wood products as door frame, door leaf frame and door leaf panel.

Steel fire door: use steel to make door frame, door leaf frame and door leaf plate. If the door leaf is filled with materials, it will be filled with non-toxic and harmless fireproof and thermal insulation materials, and equipped with fireproof hardware accessories, which have certain fireproof performance.

Steel wood fire door: use steel and non combustible wood or non combustible wood products to make door frame, door frame and door leaf plate.

Fire doors of other materials: use inorganic non combustible materials other than steel, non combustible wood or non combustible wood products, or partially use steel, non combustible wood and non combustible wood products to manufacture door frames, door leaf plates, door leaf panels, door leaf filling materials, filled with non-toxic and harmless fire and heat insulation materials for human body, and equipped with fire-resistant hardware accessories with certain fire resistance.

Fire doors are usually located in the following locations.

(1) Surround the evacuation stairs and lead to the aisle; Seal the elevator room and pass through the front room and the door leading to the aisle.

(2) Inspection door of vertical pipe well, such as cable well, pipe well, flue gas pipe, garbage pipe, etc.

(3) Divide the fire room and control the firewalls and doors of fire neighbors in the building area of the fire room.

When it is difficult to install firewall or fire door in the building, it shall be replaced with fire shutter door and must be protected with water curtain.