1. Fire door components
Fire door is to point to inside certain time, together with frame can satisfy the door of requirement of fire resisting stability, integrality and heat insulation.The main components of fire door include door, door frame, glass, door lock, handle, hinge and door closers.
2. Fire rating of fire doors
According to the different fire resistance limit, fire door points a, b, c three grades, fire resistance limit is not less than 1.5h, 1h and 0.5h.
3. Fire door material
According to different materials, fire doors can be divided into steel fire doors, wooden fire doors .
Door of woodiness fire prevention is to point to make door frame, door leaf, framework with lumber or woodwork, fill incombustible material in door leaf interior, what deserve to form with hardware part place can satisfy stable piece of fire resistance, integrality and the door that insulation sex asks.Door of steel qualitative fire prevention is to point to make door frame, door board, frame with cold rolled sheet steel, fill incombustible material in door leaf interior, what deserve to be composed with hardware part place can satisfy requirement of fireproof stability piece, integrality and insulation sex.Glass fire door is to point to the steel fire door that makes door board completely with fire glass.
4. Fire door structure
Fire doors such as classification by structure, can be divided into categories: single, double, single with glass, double with glass, single with narrow, double with narrow, single with glass with vision, double with glass with vision,etc.
5. Normally closed fire door
The normally closed fire door is closed at ordinary times and needs to be opened when someone walks around.Normally closed fire door this kind of open state has some shortcomings, because the fire door installation place is usually the person often walks the passageway, has caused certain contradiction.Especially in large shopping malls, if there is a large flow of people, if a normally closed fire door is set up in the evacuation stairwell, the fire door will be damaged and fall off quickly due to the frequent opening and closing, so as to play no fire prevention role and form a fire hazard.