体育馆疏散楼梯设计不当北京铁路局太原勘测设计院朱国锋现象在中小型体育馆建筑中，有的建筑专业设计人员将安全疏散用楼梯设计不当，其疏散口尺寸过小，踏步而至楼板结构构件底部的垂直距离小于２２００ｍｍ，当人流通过该楼梯时极易碰伤头部，造成使用不便（图１）。图... Improper design of evacuation stairs in the Beijing Stadium Beijing Railway Bureau Taiyuan Survey and Design Institute Zhu Guofeng Phenomenon In the construction of small and medium-sized gymnasiums, some professional architects have improperly designed safety evacuation stairs, and the size of the evacuation opening is too small to reach the bottom of the structural members of the floor slabs. The vertical distance is less than 2200mm, and it is very easy to injure the head when people pass through the stairs, resulting in inconvenience in use (Figure 1). Graph...