Engineering design problem is a complex problem for many engineer fields to find an optimal solution.Many researchers applied an optimization technique as a tool for solving the best solution in each problem and become a powerful method for engineering into design problem.Structural optimization is a one field of engineering which apply many optimization techniques for optimal solution in each load case.There are three main optimization techniques for the structural optimization;topology optimization,size optimization and shape optimization.Topology optimization is the most complicate problem compare with other optimization techniques because of the final layout from topology optimization is not consideration from the initial design domain while shape and size optimizations are concern the initial layout.