Steel structure is widely used in large plants, stadiums, super high rise and other fields because of its light weight and easy construction, summarizing the requirements of steel structure for reference. 　　 　　A: steel structure installation requirements  　　(1) There should be a construction process or program, measurement correction, high strength bolt installation, negative zero construction and welding process should be tested or evaluated before installation.  　　(2) The detection of installation deviation should be carried out after the structure is formed as a spatial stiffness unit and connected and fixed. 　　(3) The installation must control the construction loads such as roof, wall platform, ice and snow loads, etc. are strictly prohibited to exceed the bearing capacity of beams, trusses, floor panels, roof panels, platform laying.