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SF series of cold-formed steel is processed by the hot coil, thin wall, light weight, excellent performance of cross-section, high strength, good load capacity, compared with the traditional channel. It can save 30% as the same strength. It’s widely used in steel building purline, wall beams and can replace the traditional construction lifting angle. It can also be combined into a own composite panels lightweight roof trusses, shelves, brackets and other building components. Steel itself for a P-type, PSC-tube clamp, bundle can arbitrarily positioned in the longitudinal direction. In addition, it can also be used in the columns, beams, and arm of light manufacturing machine. Steel construction is simple, time-saving and labor, and light weight. Length can be according to customer’s requirements .It can be connected into different combinations with a variety of accessories. Features: Crimping jagged, effective shear, slip, shock; free solder, drill-free, easy to construct. Features 1:high strength, features 2:13 * 40 waist back hole with Φ21 round hole is staggered through the length, it can be directly supporting the use of screw M8-M20, features 3: The two forms that upper and lower notches can compatibly support or hang after double together