The next step is to design the test gate structure. We have studied the structural steel information, and we will use box steel because it is readily available in the market and is popular for structural work, referring to industry standards in Thailand and Japan. The steel grades commonly used in these standards are SS300, SS400 and SS490, each having different mechanical properties and chemical compositions. However, SS400 is the most commonly used steel grade and can be easily purchased in the store. We will use SolidWorks software for the design.