Seismic mostly low-rise villa roof sloping roof, so the roof structure is basically made from cold-formed steel members triangular steel truss system, metal housing, light steel structural components in After sealing plate and plasterboard, forming a very strong "board rib structure system", which has a stronger seismic structural system and the ability to resist lateral loads are applied to the seismic intensity of 8 degrees above areas. Wind resistance-type steel construction light weight, high strength, good rigidity, strong deformation. Only one-fifth the weight of buildings brick structure, resistant to 70 meters per second hurricane steel works price, so lives and property can be effectively protected. Arch Gateway Arch in St. Louis, Missouri, is the tallest monument in the United States alone stand upright. This glittering arc shape made of steel, they stand, there are nearly 200 meters high, the span is nearly 200 meters, and exactly the same height. According to records of steel, Finnish-Americans, the famous architect Iloilo? Surrey tender in a nationwide design competition in the late 1940s designed the Gateway Arch. However, the project until February 1963 was commenced, completed in October 1965. Later, the arch adds a transportation system, so that people can board the arch at the top of a viewing platform overlooking look. Gateway Arch is located in the Mississippi River, was hailed as a gateway to the west door. Cheonggyecheon steel manufacturers _ Peng Jian steel (certified) _ Steel provided by Zhuhai, Dongguan City, Peng Jian Steel Limited. Steel Co., Ltd., Dongguan City, Peng Jian (dgpengjian.cn) is Dongguan, steel leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Peng leader in steel construction with the staff warmly welcome all inquiries negotiations to create Peng build a better future for steel.