Jilin steel, Peng Jian steel, specialty steel plant by Design Co., Ltd., Dongguan City, Peng Jian steel. Steel Co., Ltd., Dongguan City, Peng Jian (dgpengjian.cn) Guangdong Dongguan, steel leader, over the years, the company is implementing 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 Jian Steel a better future. Also, there are reference values: If the cost per square meter, the maximum component weight, the maximum span, structure, higher eaves, whether when these heavy steel or lightweight steel for the judge to provide empirical data on the plant, of course, many of the buildings are now light and heavy steel are. But there is something we can be more sure that heavy steel: such as: petrochemical plant facilities, plant plants, large-span stadiums, exhibition centers, senior or super high-rise steel structures. Actually national norms and technical documents are not heavy steel one that is the difference between BOLTED, perhaps called general steel as "ordinary steel" is more appropriate. Because a wide range of ordinary steel can contain a variety of steel structures, regardless of load size steel plant design, and even many of the elements of light steel structure steel plant, BOLTED Technical Specification only the characteristics of its "light" and provides some more specific content, but the range is confined to single portal frame. Strut is a rather vague term, there are two general understanding. One is the current "Steel Design Code" (GBJ 17-88) in Chapter 11, "bar, a small angle of light steel" refers round and less than L45 * 4 and L56 * 36 * 4 of light steel angle produced, mainly for lack of age when small steel structure manufacture of reinforced concrete structures should not be used, has been basically not using, so this steel design specification has been revised substantially tendency removed. Another is a single solid web portal frame structures with lightweight roof and exterior wall light (you can also conditionally adopted masonry facades) of the "portal frame BOLTED technical regulations" under, here mainly refers to the envelope of light are made of light materials. Since the former is almost canceled, so now Strut meaning mainly refers to the latter. Thus, the points of light steel and heavy steel structure itself is not the severity of, and in the envelope material to withstand the severity of, and in the structural design concept is still the same. 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 the layers), and standards are too low, which is the standard 60 years ago, 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.