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某7层大楼在施工现场浇楼梯踏步过程中,因未考虑其装修材料——预制水磨石踏步板尺寸的影响,导致装修后的上下梯段相邻踏步高差严重超标(允许高差不超过10mm),见图1。图2是考虑到水磨石踏步板尺寸影响的现浇楼梯踏步施工图。由图2可知,要想使装修后的楼梯踏步上下照齐,相邻踏步高差在允许范围之内,每一梯段起步时的第一级踏步应向外移:2×水磨石踏步板厚+2×结合层=
A 7-story building was poured into the stairs at the construction site because it did not consider the impact of its decoration material, the precast terrazzo stepping plate, causing the height difference between the adjacent steps on the upper and lower steps after the decoration to seriously exceed the allowable height difference (the allowable height difference is not more than 10mm). see picture 1. Figure 2 is a step-by-step construction drawing of a cast-in-place staircase considering the influence of the size of the terrazzo tread. From Fig. 2, we can see that in order to make the decorated stairs step up and down, the adjacent step height is within the allowable range, and the first step at the start of each step should be shifted outwards: 2 × terrazzo step thickness +2×binding layer=