在美国加州俄克兰市,采用一种新的建筑体系,27天建成了一幢有200套公寓的13层公寓式楼房,每套公寓的建筑面积为50平方米。这种建筑体系是把工厂预制的混凝土墙板、楼板与现浇混凝土相结合,并采用了浴室盒子构件、电梯井盒子构件和顶层机房构件等附属体系。墙板的空心率达50%,由于墙板自重小,可以采用较大的构件,避免和减小了外露的竖缝,同时运输安装比较经济。墙板 In Oklahoma City, California, a new building system was used to build a 13-story apartment building with 200 apartments in 27 days. Each apartment has a floor area of ​​50 square meters. The building system is a combination of factory-prefabricated concrete wall panels, floor slabs, and cast-in-place concrete, and uses ancillary systems such as bathroom box components, elevator shaft box components, and top-floor engine room components. The hollow rate of the wallboard is up to 50%. Because the wallboard has a small self-weight, larger components can be used to avoid and reduce the exposed vertical joints. At the same time, the transportation and installation are more economical. Wallboard