The materials used in Metal Buildings have the characteristics of light dead weight and high strength. The dead weight of steel structure buildings is about 30% lower than that of concrete buildings. The advantage of prefabricated steel structure - fast, due to its different construction characteristics, the construction period of steel structure is more than 50% higher than that of PC. The steel structure is light and strong, saving materials; the construction process saves energy, water and land; the material can be disassembled and recycled, and the recycling rate can reach 70%;Well-designed, sophisticated system steel structure, low cost; as labor costs continue to rise, the labor, formwork, materials and other costs of traditional concrete structures are higher than those of steel structures.