民用建筑安装预制空心楼板时 ,有时由于房屋进深不合模数或楼板排列不合理 ,会出现楼板一侧压墙的现象 ,这是不允许的。预应力和非预应力楼板都一样 ,按照支承受力情况可分为单向板和双向板。单向板是指把楼板两端部支承在墙或梁上 ,四边支承在墙或梁上的楼板为双向板。单向板? Civilian buildings to install prefabricated hollow floor, sometimes because of the house into the depth of non-modular number or floor arrangement is unreasonable, there will be pressure on the side of the floor phenomenon, which is not allowed. Prestressed and non-prestressed floors are the same, according to the supporting force can be divided into one-way board and two-way board. A one-way board refers to the floor at both ends of the support in the wall or beam, the four sides supported on the wall or beam on the floor for the two-way plate. One-way board?