Steel structure building is a structure composed of steel materials and is one of the main building structure types. The material of the steel structure skeleton mainly includes steel beams, steel columns, steel trusses and other components made of section steel and steel plates, and adopts rust removal and rust prevention processes such as painting and galvanizing. The steel structure enclosure materials are mainly composed of color steel galvanized sheet, color steel composite sheet, and sunshine board. Structural steel is a material used for steel construction, which is formed with a specific shape following certain standards of chemical composition and strength. It is designed to have a good strength / weight ratio (which is also called specific strength) and to be cost-effective in order to be benefited as a structural component in buildings, roads, bridges, etc. Common types of steel building materials are plates, beams, channels, angles, flats, round bar, enclosure materials, ect.