Strength Index by the elastic limit steels σe, yield strength σy, and ultimate tensile σu, designed to yield strength of steel-based, steel canopy, high yield strength can reduce the weight of the structure, steel structure, save steel, reduce Cost. Σu tensile strength steel that is the maximum stress before damage can afford at this time due to plastic deformation of the structure and lost the use of a great performance, but the structure does not collapse deformation, structural resistance requirements to meet when severe earthquake. 'Σu / size σy value, can be considered parameters strength of steel reserves. Steel is the main structure of steel production, steel construction, is one of the main building structure types. Characteristics of the steel is a high strength, light weight, good rigidity, strong deformation, so for the construction of large-span and ultra-high, super-heavy buildings is particularly suitable; homogeneous and isotropic material is good, is the ideal elastomer best serves the general engineering mechanics basic assumptions; material ductility, toughness, and can have a large deformation, can well withstand dynamic loads; construction period is short; its high degree of industrialization, can be high degree of mechanization of specialized production. Light steel plant | 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.