Xiamen Xu Gang Steel Engineering Co., Ltd. is a production of steel structure design, production, installation in one of the high level of one-stop services company, covers an area of ??1500 square meters, the annual production capacity of 800,000 square meters installed over fire ladder Type Price, who has participated in supporting the construction of highways, bridges and other major projects in the industry establish a good reputation, praised by users. Steel is damaged, we want to solve the problem immediately find immediate lifting mechanism fire ladder, steel mesh steel damaged the main factors introduced are: 1) load change by fire ladder, extended service, leading to structural changes in the norms and regulations bearing power shortage; 2) members due to various unexpected deformation, distortion, disability, depression, etc., resulting in the member section weakened rod warping, cracking and other connections; 3) the role of the temperature difference causes part or connection deformation, cracking and warping ; 4) as a result of erosion and chemical corrosion and electrochemical corrosion of steel components resulting in weakened section; 5) Other includes the design, manufacture, construction errors and improper use of the service period and other operations. Xiamen Xu Gang Steel Engineering Co., Ltd. is a production of steel structure design, production, installation in one of the high level of one-stop services company, covers an area of ??1500 square meters, the annual production capacity of 800,000 square meters installed more than once has participated in supporting the construction of highways, bridges and other major projects in the industry establish a good reputation fire ladder fabrication and installation, praised by users. Early twist torque: To reduce the impact of bolted steel during deformation, can be tightened to reduce secondary interactions has Tighten bolts between. High-strength bolts screwed for the first time early twist to the axial force should reach 60% to 80% of the standard axial force. Final twist torque: high-strength bolts fastening torque for the last final twist torque. Consider a variety of prestressing loss, according to a final twist torque than the general design of the pre-tension torque value for the theoretical calculation of the big 5% to 10%. Fire ladder fire ladder price _ _ Xiamen Xu steel steel works by Xu Gang Steel Engineering Co., Ltd., Xiamen. Xiamen Xu Gang Steel Engineering Co. (www.xusteelchina.com) strong, credible, in Xiamen, Fujian steel industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Xiamen Xu Gang Steel Works Ltd. and you hand in hand into the brilliant, for a better future!