What is the steel structure, with the scientific research language, the steel structure should be made of stainless steel plate as the main structure, which is now one of the key structural types of building engineering.Steel structure is made of steel beams, steel columns, steel tube trusses and other components made of steel grains and carbon steel plates. The structure of each component or component is welded by electric welding, anchor screws or rivets in the middle.Features:1, steel toughness, good plasticity, uniform material, high structural reliability, suitable for bearing impact and dynamic load, with good seismic performance. The internal structure of steel is uniform, which is close to isotropic uniform body.2, the material strength is high, its own weight is light, the steel strength is high, the elastic modulus is also high. Compared with concrete and wood, the ratio of density and yield strength is relatively low, so under the same stress conditions, the steel structure has small section, light weight, easy transportation and installation, and is suitable for the structure with large span, high height and heavy load.3, the steel structure sealing performance is good, because the welded structure can be completely sealed, can be made into air tightness, water tightness are very good high-pressure vessels, large oil pools, pressure pipelines and so on.