The external wall of a warehouse is a reinforced concrete two-way slab which has one simplysupportedend and three fixed ends, bearing load of triangle.
堆场类建筑的外墙一般按照三边固定一边自由的混凝土双向板，板承受荷载为三角形荷载。
2
In this paper, sine series and polynomial beam functions are derived. They can satisfy various boundary conditions of beams such as the simplysupported ends, fixed ends and free end.