防火门

• 作 者: 史郁葱 于洪
• 出 处: 建筑知识
• 发表日期: 1995年02期
• 关键词: 防火门 管道井 封闭楼梯间 井道 防火分隔 耐火极限 防烟楼梯间 前室 电梯间 检查门

“门”是任何建筑都不可缺少的,防火门作为一种特殊用途的门,除具备普通门的作用外,还具有防火、隔烟的特殊功能。一旦发生火灾,它对于抑制火灾蔓延、保护人员疏散有着重要作用。防水门一般设置在建筑物的三个部位:即防火墙和防火分隔墙上的门;封闭楼梯间、通向走道、防烟楼梯间、消防电梯间通向前室及前室通向走道的门;电缆井、管道井、排烟井道等管井壁上的检查门。 一、防火门的耐火极限

The “door” is indispensable for any building. As a special-purpose door, the fire door has the special function of fire prevention and smoke separation in addition to the ordinary door. Once a fire occurs, it plays an important role in restraining the spread of fire and protecting the evacuation of people. Waterproof doors are generally installed in three parts of a building: firewalls and fire-proof partitioned doors; enclosed stairwells, access to walkways, smoke-protected stairwells, fire-extinguishing elevators leading to the front room and front rooms leading to walkways. The inspection gates on the wall of tube wells such as cable wells, pipe wells and smoke exhaust wells. First, the fire resistance of fire doors