Some designers in the design description often wrote: using pressure-type high-strength bolts 10.9S, this is an incorrect statement. For designers of high-strength bolts as long as the given performance level anti-slip coefficient of friction surface and connecting material can be, do not require manufacturers in what bolts. "Hongdan twice backing, mixed paint twice Overlay" This description makes clear paint brand (Hongdan variety) steel, the film thickness is unknown (paint should indicate the thickness of each layer) steel manufacturers, but the standard is too low, which is the standard steel before the 1960s, there are still people so used, description of the corrosion is not valued. For corrosion protection, we want to determine the corrosive environment of steel structures; 2, determine the protection of steel structures protection period; 3, to determine the thickness of the paint and varnish varieties. So, after steel production steel surfaces should be sand-blasting, rust can be coated after antirust paint and surface paint, to give different designs matching the corresponding coating thickness depending on the environment. Such steel rust are better reflected. Features 1, 2 steel lighter weight, high reliability 3 steel works, steel vibration (shock) resistance, impact resistance 4, a higher degree of industrialization 5 steel manufacturing, steel can be quickly and accurately assembled six, seven large steel interior space, easy to make sealing structure 8, 9 corrosive steel, steel and poor fire resistance of steel manufacturers, steel Hunan, Peng Jian Steel Co., Ltd., Dongguan City, Peng was built by Steel . Steel Co., Ltd., Dongguan City, Peng Jian (dgpengjian.cn) strong, credible, in Dongguan, Guangdong steel industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement Peng Jian innovative ideas will lead into the brilliant steel and you work for a better future!