设计条件:这座公寓建筑造在拥挤的住宅区,可使用的建筑面积仅8100平方呎,(约753平方米),楼层允许的高度105呎(36米)。由于地位局促,楼梯井用滑行模板浇捣混凝土,楼板用后张预应力升板法施工。三个楼梯井设计得可以吸受地震力,因此可毋须另外设置剪力墙,并且每个井个别自己稳定。这些楼梯井先施工,在各层楼板的适当地位留有预埋铁 Design conditions: This apartment building is built in a crowded residential area with a usable construction area of ​​only 8,100 square feet (approximately 753 square meters), and the permitted floor height of 105 feet (36 meters). As a result of the straitened status, stairwells are poured concrete with sliding formwork, and the floor is constructed with post-tensioned pre-stressed riser plates. The three stair wells are designed to absorb seismic forces, so there is no need for additional shear walls, and each well is individually stable. These stairwells are constructed first, leaving the embedded iron in the appropriate position on each floor.