1. Brief:Light steel structure is a new and great vitality of steel structure system, has been widely used in industrial and agricultural, commercial, service construction, such as office buildings, villas, warehouses, sports stadiums, entertainment,tourism, construction and low, multilayer residential buildings, light steel frame and other fields.Determine the structure of steel and light steel structure, we can with some data comprehensive consideration and judgment:1,crane lifting weight: greater than or equal to 25 tons, can be thought of as chongqing steel structure.Steel weight of the 2,
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