Prefabricated member according to the installation order and process requirements and assembly of prefabricated steel members on the steel platform, steel canopy, to ensure the quality of welding production. Steel flange plate splice splice splice joints and seams web spacing should be greater than 200 mm. Flange plate splice length of not less than 2 times the strip width; web splice width of not less than 300 mm, a length of not less than 600 mm. Good weldability, Steel plant cost, is that under certain conditions the welding, steel, weld metal and the base material are not close to cracking. Welding performance on the use of performance refers to the impact toughness of welds and heat affected zone ductility required mechanical properties of weld metal and heat affected zone is not less than the mechanical properties of the steel base material. Welding performance test methods of welding process, also used welding performance test method on the use of the use of nature. Steel Structure Design | Guangxi Yinhe (certified) | steel supplied by Guangxi Yinhe metal structure Engineering Limited. Guangxi Yinhe metal structure Engineering Company Limited (www.gxmmr.cn) Guangxi Nanning, the activities of the leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Guangxi Yinhe leadership with the staff warmly welcome all inquiries negotiations to create the Guangxi Yinhe better future.