Subsequently, our next undertaking involves the meticulous design of the testing gate structure. This endeavor follows a comprehensive examination of data related to structural steel. In accordance with industry standards established in Thailand and Japan, our choice of material for this purpose is box steel. The rationale behind this selection lies in its widespread availability in the market and its prominent status within the realm of structural construction.Within these industry standards, the prominent steel grades are SS400 and SS490. It is pertinent to note that these grades possess distinctive mechanical properties and chemical compositions. However, it is pertinent to highlight that SS400 stands as the most prevalent and widely utilized steel grade in our context. To facilitate the intricate design process, we have opted to employ the sophisticated software tool, SolidWorks.