Steel structure has been more popular among people, but because the steel structure corrosion problem has been a problem in the industry, the material itself is poor corrosion resistance, heat resistance is not fire-resistant shortcomings, if the project application can not properly handle the steel structure corrosion and fire protection problems, will directly affect the safety and durability of the project. As the steel surface cladding after the steel structure corrosion and fire protection issues.

Rust removal and coating of steel structures is a work easily ignored by steel structure contractors and is also a weak link in steel structure engineering construction. If this phenomenon is not corrected, it will have a great impact on the construction quality of the steel structure, because the quality of rust removal and painting will directly affect the maintenance cost of the steel structure during its future use, as well as the service life of the steel structure project, the safety of the structure, and the fire resistance time in case of fire (fire-resistant painting).

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.