安全疏散距离是指建筑物内最远处到外部出口或楼梯最大允许距离。
某大型超市具有人员活动集中、火灾荷载密度较大以及疏散距离超长等特点，需要重视消防设计和安全分析。
Evacuation is quite difficult for a large-scale supermarket when fires happen because of the personnel activity concentration, bigger fire density and further dispersing distance.
设备的框架、平台连通地面的梯子个数按规范设计、安全疏散通道间的距离不大于50米。
Number of stairs in equipment structure, operation platform and ground conform to design specifications, and the distance between safety evacuation passages isn't more than one of 50 m.
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