In the design of commercial buildings,the widths of fire-escape stairs and the fire-resisting doors to adjoining fire departments served as auxiliary exits in large emporia become quite conspicuous problems.

Design and calculation of total width of evacuation staircase for shopping business hall;

Through the comprehensive analysis of the evacuation staircase,safe exit and passage width of commercial buildings,it introduces the basis of calculating evacuation width and its steps,summarizes some simple calculation methods combined with design experience and calculation examples,so as to make the safe evacuation width design of commercial buildings more reasonable.