竣工后投入使用的高层建筑,楼层越高,建筑面积越大,内部的人员也就越多,一旦发生火灾,造成的人员伤亡也大,通常情况下是成正比的。例如美国纽约的世界贸易中心大厦高417米有110层,每天来上班的人就有5万多,来访和参观的游客约8万人。1993年2月26日地下停车场发生爆炸案,结果因火灾等原 After the completion of high-rise buildings put into use, the higher the floor, the larger the construction area, the more the internal staff, in the event of a fire, causing casualties are also large, usually proportional to. For example, the World Trade Center Tower in New York City, United States has a height of 417 meters and 110,000 people commuting to work each day. Over 50,000 visitors come to work and about 80,000 tourists visit each day. February 26, 1993 underground car park explosion, the result of the original fire and so on