每座大楼都有防火干板墙保护其楼梯井。
Each building had fireproof drywalls to protect the stairwells.
几个台阶通向一楼和楼梯井；它们底部宽，上面窄，铁扶手镶嵌到墙里面，朝外弯曲，跟街道持平。
Several steps led up to the first floor and stairwell; they were wide at the bottom, narrower above, set between walls topped with iron banisters and curving outwards at street level.
对后烟井前墙包复鳍片管结构突变处进行定性力学分析，针对性地提出相应措施及制造、安装时注意事项。
Qualitative mechanical analysis was made for special structure of back pass front wall, and relevant measures and notices for manufacturing and erection are presented.
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