Double C products adopt Q345 high-strength structural steel, cold-bended forming, high-galvanizing layer anti-corrosion treatment, all profiles are 275g/m2 hot-dip galvanized, with high corrosion resistance, no special maintenance treatment is required for 30 years.The installation is simple and convenient. The column, beam, the purlin and other secondary components adopt the standardized connection node design, which improves the installation efficiency greatly.