It is often heard that purlins, C-shaped steel, Z-shaped steel, and CZ-shaped steel are mentioned. In fact, they include C-shaped steel and Z-shaped steel, but both C-shaped steel and Z-shaped steel perform better than traditional steel products in practical applications.

Seismic resistance: most of the roofs of low-rise villas are sloped roofs, so the roof structure is basically a triangular roof truss system made of cold-formed steel members. After sealing structural plates and gypsum boards, light steel members form a very solid "plate rib structure system", which has stronger seismic resistance and resistance to horizontal loads and is applicable to areas with a seismic intensity of more than 8 degrees.