Cold Roll forming hollow section can be used for construction, vehicles (railway, automobile, etc.) manufacturing, mine construction, bridge construction, power and construction, including cold-formed steel construction is the largest user, for cold-formed steel The main structure construction is used for square and rectangular steel pipes and tubes and all kinds of cold-formed steel sections of the openings. They are widely used in load-bearing frame and components, such as cold-formed square and rectangular steel pipe, tube or column for the production of beams; square, rectangular steel beam supporting the production and the opening single components, accessories, such as roof trusses, steel, sandalwood articles, support platforms, stairs, doors, windows and pipes and so on.（by alshaheer）
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