Light Steel refers angle round and less than L45 × 4 and L56 × 36 × 4 production of lightweight steel knot. National norms and technical documents are not heavy steel one said. "Steel Design Code" GBJ17-88 have effect from December 1, 2003 repeal, now is one of "the steel structure design specifications" GB50017-2003. Not refractory heat-resistant steel, when the temperature is below 150 ℃, the steel properties change little. Thus steel suitable for hot workshop Steel plant cost, but the structure of the surface by the heat radiation of about 150 ℃ steel design, insulation boards to be used to protect them. Temperature at 300 ℃ -400 ℃ when steels strength and elastic modulus decreased significantly steel manufacturers, the temperature at about 600 ℃, the strength of steel to zero. With special needs in fireproof building, refractory steel must be protected in order to improve the fire rating. Steel steel manufacturers _ _ Guangxi Guangxi Galaxy Galaxy by metal structure Engineering Limited. Guangxi Yinhe metal structure Engineering Company Limited (www.gxmmr.cn) strong, credible, in Nanning, Guangxi's activity room industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Guangxi Yinhe into the brilliant and you work for a better future!