2, steel structure is mainly composed of steel, is one of the main types of building structure. The structure is mainly composed of steel beams, steel columns and steel trusses made of section steel and steel plates, and the components or parts are usually connected by welding, bolts or rivets. Because of its light weight and simple construction, it is widely used in large factories, stadiums, super high-rise buildings and other fields.
3. Welding: also known as welding and melting, is a manufacturing process and technology to connect other thermoplastic materials such as metals or plastics by heating, high temperature or high pressure.