The steel structure is easy to make and the construction period is short. The steel members are generally made in the metal structure factory, and the construction mechanization, accuracy and precision are high.All materials of steel structure have been rolled into various profiles, and the processing is simple and rapid.Light steel structure, simple connection, convenient installation and short construction period.A small number of steel structures and light steel structures can also be fabricated on site for simple hoisting.The steel structure can provide larger space and more spacious working surface for construction.The columns of steel structure engineering generally take 3-4 floors as a construction section, which are hoisted at the construction site at one time.Moreover, the hoisting of columns, the installation of steel frame, the pouring of reinforced concrete core tube and the construction of composite floor can be carried out in three-dimensional cross operation.Sometimes when the upper part is installed with columns and frames, the lower part can be used for interior decoration and decoration.Therefore, under the conditions of ensuring technology, supply and management, it can be put into use in advance.Due to the connection characteristics of steel structure, it is easy to reinforce, rebuild and demolish. 

       The raw materials and finished products used in the construction of steel structure engineering shall be accepted on site. The raw materials and finished products involving safety and function shall be re inspected according to the code for acceptance of construction quality of steel structure engineering (GB 50205-2001), and the sampling and sample submission shall be witnessed by the supervision engineer.  

       The steel used by steel structure company mainly includes ordinary carbon steel and low alloy high strength structural steel. Article 4.2.1 of code for acceptance of engineering quality of steel structures (GB 50205-2001) stipulates that “the varieties, specifications and properties of steel and steel castings shall meet the current national product standards and design requirements.The quality of the imported steel products shall meet the requirements of the design and the standards specified in the contract. “In recent years, the application of steel castings in steel structures (especially large-span space steel structures) is gradually increasing, so it is absolutely necessary to put forward clear specifications on their specifications and quality. In addition, the standards for imported steel products vary from country to country, so it is stipulated that the imported steel products shall be inspected and accepted according to the design and contract standards.