建筑物的楼梯多为钢筋混凝土板式楼梯,施工中,常因为楼梯施工缝的留设位置而争论;监理、业主、施工单位各持己见:其一,认为在每层梯段向上3个踏步以外的1/3跨中部位(图1);其二,认为留在每个楼层梯段的根部。这两种留设方法都有自己的道理,前者根据构件受力,从理论上说明留缝位置,而后者从工程实际出发,便于施工。根据多年的施工经验,我认为后者留缝位置要比前者好得多。 Most of the stairs of the building are reinforced concrete slab staircases. During construction, disputes often arise because of the location of the stair construction joints. The supervisors, the owners, and the construction units have their own opinions: First, they think that there are three steps above each floor. 1/3 of the mid-span site (Figure 1); second, it is thought to remain at the base of each floor step. These two methods of reservation have their own reasons, the former according to the components of the force, from the theoretical description of the location of the joint, and the latter proceed from the actual situation of the project, to facilitate the construction. Based on years of construction experience, I think the latter is much better than the former.