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.

Advantages of steel structure construction plant. 　　1、Widely used: It can be applied to factories, warehouses, office buildings, gymnasiums, aircraft hangars and so on. It is suitable for both single-story large-span buildings and multi-story or high-rise buildings. 　　2、Simple construction and short construction period: All the components are prefabricated in the factory, and only simple assembly is needed on site, thus greatly shortening the construction period, a building of 6000 square meters can be basically installed in 40 days. 3、Durable and easy to maintain: the steel structure building designed by general computer can resist bad weather and only needs simple maintenance 4、Beautiful and practical: The steel structure building has simple and smooth lines, with a modern sense. Colorful wall panels are available in various colors, and the walls can be made of other materials, so it is more flexible. 5、Reasonable cost: steel structure building is light, reducing the cost of foundation, fast construction, can be put into operation as soon as possible, and the comprehensive economic benefits are much better than concrete structure building.

In the process of steel structure engineering design, the selection of reasonable steel has a very critical role. It can be said that the task of steel selection is both important and difficult. There are many kinds of steel in China, and it is difficult to choose the most suitable steel for steel structure construction from many steels, and the current steel structure engineering construction design for steel requirements are also high, different steel structure engineering requirements for steel structure strength, deformation and fatigue stress are also different, so there is a certain degree of difficulty in the selection. Therefore, in the design, in order to better play the role of the steel structure, must start from the actual, combined with the specific construction requirements of the scientific selection of steel. In the selection of steel, it is also necessary to scientifically judge its applicability. At present, the span of the building steel structure and the load are relatively large, mainly used in the more complex high-rise steel structure project or large steel structure project. Therefore, the steel must meet the construction needs of the steel structure, be able to withstand high temperatures and vibrations, and be easy to disassemble. This requires the designer to investigate and study before design, and comprehensive analysis, fully consider the suitability of the steel structure, before the design work can be carried out.

The bolt holes of the connecting parts shall be processed according to the relevant regulations. The accuracy of the bolt holes, the surface roughness of the hole wall, the allowable deviation of the hole diameter and the hole distance, etc. shall comply with the current national standard "Code for Construction Quality Acceptance of Steel Structure Engineering" GB50205. Regulation.

Steel structure has been more popular among people, but because the steel structure corrosion problem has been a problem in the industry, the material itself is poor corrosion resistance, heat resistance is not fire-resistant shortcomings, if the project application can not properly handle the steel structure corrosion and fire protection problems, will directly affect the safety and durability of the project. As the steel surface cladding after the steel structure corrosion and fire protection issues.

The main measures to improve the design of steel structures and the main points of installation technology