[Chai Jin cable tray to recommend the star product - the bridge] expansion and contraction problem: As the ambient temperature changes, expansion and contraction of the steel cable tray will appear phenomenon. Outdoor bridge influenced by temperature environment such as the maximum temperature is 40 ℃, the lowest temperature of -20 ℃, the maximum amount of shrinkage cable tray obtained the following formula: Δt = 11.2 × 10-6 × 60deg (degrees) × 1000mm by This concludes: When the temperature difference is 60 ℃, Δι = 0.672mm / m difference in temperature is 50 ℃ when cable tray manufacturers, Δι = 0.560mm / m difference in temperature is 40 ℃ cable tray, Δι = 0.448mm / m linear engineering design segment cable tray should consider expansion joint, expansion joint spacing take advice given by the following: When the temperature difference is 40 ℃ for 50m; 40m when the temperature difference is at 50 ℃; for 40m when the temperature difference is at 60 ℃; [Chai Jin cable tray to recommend the star product - bridge] fireproof cable tray in the room, as far as possible along the wall of the building, columns, beams and slabs erected, as promised when the use of a comprehensive pipe gallery erected trough cable tray, side or top of the pipe should be in parallel erection, and consider deflectors and branch lines to avoid cross, if no other pipe rack borrow, you need inception (branch) column. (2) load calculation: Calculate the cable tray vertical section on the main trunk cable weight per unit length. Cable tray price | Tianjin bridge manufacturers Chai Jin (certified) | Hulunbeir cable tray cable tray provided by the Tianjin Chai Jin Limited. Chai Jin Tianjin cable bridge Limited (www.tjcjdlqj.com) is Tianjin, metal building materials leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Chai Jin leader in cable tray with the staff warmly welcome all inquiries negotiations to create Chai Jin cable tray a better future.