Strength Index by the elastic limit steels σe, yield strength σy, and ultimate tensile σu, designed to yield strength of steel-based, Fangchenggang steel, high yield strength can reduce the weight structure, save steel, reduce the 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, steel, meet the structural requirements of rare earthquake resistance when . 'Size σu / σy value, Fangcheng steel, can be considered parameters strength of steel reserves. Roofing system is composed of trusses, structural OSB panels, waterproof layer, light roof tile (metal or asphalt shingles) and associated fittings thereof. Matt building light steel roof, appearance can be a variety of combinations. There are also a variety of materials. Under the protection of the waterproof premise of this technology, the appearance has a lot of options. Steel, Guangxi Yinhe, supplied by Guangxi Liuzhou Steel Galaxy metal structure Engineering Limited. Steel, Guangxi galaxy, the Milky Way Guangxi Liuzhou Steel is a metal structure Engineering Company Limited (www.gxmmr.cn) this year introduced a new upgrade, the above picture is for reference only, please call the telephone or pictures on this page, For the latest information, contact: Mr. Sun.