发生火灾时,在高层建筑内完成疏散通常需要相当长的时间。因此,那里对居民和消防队员来说都是极其危险的环境。高层建筑灭火需要高速度、高效率,尤其需要尽可能高的安全程度,如果你不想拿生命冒不必要之风险的话。在NFPA 101:2012《生命安全规范》中,高层建筑物被定义为高度超过23 m的建筑物。高层建筑最早出现在城市风景中是在100年前的19世纪末期,那 In the event of a fire, evacuation in high-rise buildings usually takes a considerable amount of time. Therefore, there is an extremely dangerous environment for residents and firefighters. High-rise buildings need high speed fire fighting, high efficiency, especially the need for the highest possible level of security, if you do not want to take the risk of unnecessary risk. In NFPA 101: 2012 Life Safety Code, high-rise buildings are defined as buildings over 23 m in height. The earliest appearance of high-rise buildings in the city landscape was in the late 1800s, 100 years ago