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The steel structure is one of the main building structures. Steel is characterized by high strength, light weight, stiffness, so for the construction of large span and ultra-high, ultra-heavy buildings is particularly suitable;

The homogeneity and isotropy of the material are good. It is an ideal elastomer, which most conforms to the basic assumption of general engineering mechanics. Material plasticity, toughness, can have a large deformation, can well withstand the dynamic load; Short construction period; Its industrialization degree is high, can undertake mechanization degree high specialization produces; High precision, high efficiency, good tightness, so it can be used to build gas tanks, oil tanks and transformers.

Its disadvantage is poor fire and corrosion resistance. It is mainly used for heavy-duty workshop load-bearing frame, workshop structure under dynamic load, plate and shell structure, high-rise TV tower and mast structure, bridge and warehouse and other long-span structures, high-rise and super-high-rise buildings.

In the future, high strength steel should be studied to improve its yield point strength. In addition, new types of shaped steel, such as h-shaped steel (also known as wide-flange steel) and t-shaped steel, as well as pressed steel plate, should be rolled to meet the needs of large-span structures and super-high-rise buildings.

The steel structure is divided into light steel and heavy steel. There is no uniform standard for judging, and many experienced designers or project managers are often unable to fully explain, so they can consider and judge with some data.