Steel structure plant in the life of the use of more, and still relatively strong, because the steel structure of the building, so this kind of steel frame structure plant will be more practical, and still very flexible unlike ordinary buildings can only be fixed in this place, so the use of a lot of places, can be applied to a large area of the plant, warehouse and other places. A good steel structure of the plant is a lot of advantages.1, high material strength, its own light weight Steel has high strength and high modulus of elasticity. Compared with concrete and wood, its density and yield strength ratio is relatively low, and thus the steel structure under the same stress conditions of the components of small cross-section, light weight, easy to transport and installation, suitable for large span, high height, heavy load-bearing structure. 2, steel toughness, good plasticity, uniform material, high structural reliability Suitable for bearing impact and dynamic loads, with good seismic performance. Steel internal organization is homogeneous, nearly isotropic homogeneous body. The actual working performance of the steel structure is more in line with the calculation theory. So the reliability of steel structure is high. 3、High degree of mechanization of steel structure manufacturing and installation The steel structure components are easy to be manufactured in the factory and assembled at the site. Factory mechanized manufacturing of steel structure components has high precision, high production efficiency, fast site assembly and short construction period. Steel structure is the most industrialized kind of structure. 4、Good sealing performance of steel structure Because the welded structure can be completely sealed, it can be made into high pressure vessels, large oil pools, pressure pipelines, etc. with good gas and water tightness. 5、Steel structure is heat resistant and not fire resistant When the temperature is below 150℃, the nature of steel changes very little. Therefore, the steel structure is suitable for hot workshop, but when the surface of the structure is subjected to heat radiation of about 150℃, heat insulation plate should be used to protect it. When the temperature is 300℃ -400℃. Steel strength and modulus of elasticity are significantly reduced, and the strength of steel tends to zero when the temperature is around 600℃. In buildings with special fire protection needs, the steel structure must be protected by fire-resistant materials to improve the fire resistance level. 6、poor corrosion resistance of steel structures Especially in the environment of moisture and corrosive media, it is easy to rust and corrosion. Generally steel structures should be de-rusted, galvanized or painted, and maintained regularly. For the marine platform structure in seawater, special measures such as "zinc block anodic protection" should be adopted to prevent corrosion. 7、Low-carbon, energy-saving, green, reusable The dismantling of steel structures will not produce almost any construction waste, and the steel can be recycled and reused.