No steel girder strength of concrete structures is a comprehensive common core barrel steel, high-rise building civilian structures and developed all-steel girder arch free warehouse, steel structure installation has the following main challenges: (1 ) Security As the steel girder strength of steel is not in the room for a separate column without beam arch, column spacing of the larger independent non 梁拱公 Division, can not hang the safety net. (2) Quality control: Because no steel girder Stiff column bracket set asymmetry and asymmetric load, there is a big emphasis on steel columns and partial load phenomenon. (3) schedule. Arched corrugated steel roof origin: In the 1940s, the United States, some architects were inspired by the shape of the structural nature of the plant epidermis texture, with a very thin material began to seek through the corrugated stiffener, which made a large span Method structure. No 梁拱公 Division, Guangxi Galaxy (certified), without beam arch provided by Guangxi Galaxy Metal Structure Engineering Co., Ltd. Guangxi Galaxy Metal Structure Engineering Co., Ltd. (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 Galaxy leadership with the staff warmly welcome all inquiries negotiations to create Guangxi Galaxy a better future.