Steel structure building is a new type of building system, which has the advantages of light weight, easy installation, short construction period, good seismic performance, fast investment recovery, and less environmental pollution, so it is generally favored by all parties in the industry. Under the influence of the country's policy of advocating green buildings, energy conservation and environmental protection, and resource recycling, steel structures have gradually been widely used in prefabricated building construction, and the scale of the steel structure industry has continued to expand.
According to the division of prefabricated building structure system, prefabricated buildings can be divided into prefabricated concrete structures, steel structures and wooden structures. Among them, the steel structure is composed of beam steel, steel column, steel truss and other components supported by section steel and steel plate. The structure of welding seam, bolt or rivet connection is usually used between each component or part, and silanization and pure manganese phosphating are used at the same time. , Washing and drying, galvanizing and other rust removal and anti-rust processes.
According to relevant data, at present, the domestic steel structure industry is showing a trend of rapid development. The output of steel structure has increased from 8.5 million tons in 2002 to 22.94 million tons in 2009, with an average annual compound growth rate of 15.24%. From 2010 to 2019, it was a stage of rapid development of steel structures, and the output of steel structures increased from 26 million tons to 73.73 million tons.
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