【 Weak current College 】 on fire doors in the selection and application

1. fire doors
Fire doors are all types of buildings in the most common can hoist fireproofing widget. Meet the requirements of the fire door should have good high temperature resistance, heat and smoke penetration performance and should have the fire officer after the adoption of its own closed, ensure its fireproofing function.
2. fire doors category
Division by making material: steel fire doors; wood fire doors.
Division by fire resistance: class a fire door-not less than 1.2 hours; class b fire door-not less than 0.9 hours; class c fire door-not less than 0.6 hours.
Press open and close feature: normally closed doors; normally open fire doors.
3. the application of fire door
Steel fire doors affordable, but its great, open a laborious and the style tedious, polished, so much for industrial buildings and common grades of the civil construction, or building on the artistic requirements of low, normal people flow small parts (such as room, garage, etc.); on the contrary, wooden fire door opening and close of light weight, flexible and appearance can be ornamental, figure, but the price is high, usually used in high-grade civil buildings or buildings important occasions. Generally each worth mentioning fire door applicable maximum hole size approximately: high 3.3m, wide-single-leaf 1.1m, dual fan 3.0m. Engineering design in addition to strictly follow the specifications of the occasion, the position, width, and set the fire door opening direction, there should be aware of:
(1). the width of the door leaf on evacuation of
Fire doors are located in evacuation path (such as stairs, front room, corridors, etc.), the architectural plan detail design slightly does not pay attention to could cause after blocking the door leaf to open evacuation route, reducing its effective width, violating the basic requirements for evacuation. In evacuation path juncture and high-rise residential buildings in this phenomenon, especially, should pay attention to, be avoided.
(2). the road to adjacent partitions evacuation problems
Under certain conditions, when there are leading to the adjacent fire partitions of a fire door, high-rise buildings allow each partition only a safe exit. It should be noted that, since the fire door opens only one-way, if adjacent to the two partitions are only a safety export, you should separate the two on the firewall is worth mentioning is the fire doors and opening to the sides, respectively, in order to meet the two partitions among evacuation needs.
(3). the choice of opening and closing
The most commonly used are normally closed its doors, the doors are closed, open it manually by staff, when passed to close the door leaf; if install push latch hardware is more conducive to speed up evacuation speed. However, in a public channel normally closed doors exist usually use ventilation and lighting, occlusion of sight, the disadvantages of traffic disruptions, such as poor management, its door closer and hardware are often damaged, defective, a security risk. In recent years always fire door just solved the above problem, usually it's door leaf is Gates is fixed in the open position, fire up doors with automatic release, recovery and normally closed fire door the same function. Due to the increase of fixed door and automatic release system, sometimes combined with automatic alarm system, normally open fire door will increase the cost of project. Current fire codes not on fire doors which open and close methods make it mandatory, can be used by designers considering building standard height, use of, the consumer's management needs and economic considerations, select OK.