In structure design, it is necessary to apply an economist and efficient design. Optimization techniques can be used for such purposes. The objective of this optimization is to optimize the objective function without neglecting boundary problem. Finite Element Method (Finite Element Method) is used in determining the response to various loading conditions. The combination of these two methods has been widely used in designing structures with static loading. By using the optimization module, the problem can be solved to obtain a new variable design of the system. If the design variables are included in the boundaries of design criteria, the optimization process is terminated. Conversely, if the value of the results of the analysis and optimization of the value of the module does not match, then the optimization process should be continued until the boundary conditions obtained meet the design criteria. From the results of optimization that has been done, the design meets the design criteria with variable boundary conditions. So it can be concluded that in designing the foundation due to static and seismic loads more efficiently change the thickness of the foundation plate of the changing width of the foundation.