In this paper, we report the automatic design system of piled wharf supperstructure, which carry out the calculation of bar arrangement and amakes bar arrangement drawing using computer and automatic drafting machine.
　This system has some characteristics as follows that the supperstructure is treated as grillage girder supported elastically by steel pipe pile and that the design section force caused by moving loads is calculated efficiently as a result of many considerations about loading point on slab. We are able to obtain the results in one or two days just putting the design conditions into this system.