[Chai Jin cable tray to recommend the star product - Bridge] If the different levels of cable laying in the same cable tray cable tray standard, middle partition should be increased isolation. 1.8 When the steel line segment length exceeds 30m, while aluminum cable bridge over 15m. Or when the cable tray after construction should stretch (settlement) seam allowance leaving O-30mm compensation. Its retractable connector plate connection should be used. 1.9 cable ladder, tray width and height should be chosen to meet the requirements of the filling factor, cable ladder, under normal circumstances tray fill rate trough cable tray, power cable desirable 40% -50%, control cables desirable 50%. 70%. L0% and should be reserved for a 252 project development margin. 1.10 In selecting cable tray load rating if the actual span cable tray hanger is not equal to 2m when. The work uniform load should be met: where qG ---- Work uniform load cable tray fire, kN / m; qE ---- rated uniformly distributed load, kN / m; LG ---- actual span cable bridge, m. Rated bridge uniform load rating in Table 1. [Chai Jin cable tray to recommend the star product - the bridge] (11) in the horizontal, vertical and vertical trunking bridge in laying cable, the cable banding response. Four pairs of wire cable bundle with 24 to 25 pairs or more trunk cable, optical cable and other signal cables should be based on the type of cable, cable diameter, the cable core number splitting banding. Lashing spacing should not be greater than 1.5 m, the deduction should be evenly spaced, elastic moderate. (12) when the tray horizontally laid, the support spacing is generally at 1.5-3m, laid vertically fixed to the building structure body spacing should be less than 2m. (13) when the metal trough laid up in the following circumstances under shelf or hanger: groove joints; spacing 3m; 0.5m two-port trunking leave office; the corner. Trough cable tray, tray brand integrity Chai Jin (certified), Dandong 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.