1. The structure mainly made of steel is one of the main building structure types.
2. The steel is characterized by high strength, light deadweight and high rigidity, so it is particularly suitable for building large span, super high and super heavy buildings; The material has good homogeneity and isotropy, and is an ideal elastic body, which best conforms to the basic assumptions of general engineering mechanics; The material has good plasticity and toughness, can have large deformation, and can well withstand dynamic loads; It has a high degree of industrialization and can carry out specialized production with a high degree of mechanization; It has high processing precision, high efficiency and good airtightness, so it can be used to build gas tanks, oil tanks and transformers.
3. Its disadvantage is poor fire resistance and corrosion resistance.
4. It is mainly used for load-bearing framework of heavy workshop, plant structure under dynamic load, plate shell structure, high-rise TV tower and mast structure, bridge, hangar and other long-span structures, high-rise and super high-rise buildings, etc.
5. High strength steel should be studied for steel structure in the future to greatly improve its yield point strength; In addition, new types of section steel, such as H section steel (also called wide flange section steel), T section steel and profiled steel plate, shall be rolled to meet the needs of long-span structures and super high-rise buildings.