[Chai Jin cable tray to recommend the star product - bridge] bridge fire fire protection sector, Lijiang, cable tray, you must use steel or non-flammable, fire-retardant materials. I produced a series of cable tray are BJⅢ fire bridge. V. Ground 1, the bridge system should have a reliable electrical connection and ground (only metal tray). 2, while allowing the use of the bridge when the grounding line loop system configuration meets the following requirements. The connection resistance between the ends of the bridge should not exceed 0.00033 ohms, grounding hole should remove the insulation coating. [Chai Jin cable tray to recommend the star product - the bridge] in the selection, cable tray manufacturing plant to provide the allowable load capacity should be greater than the actual amount of load G total. When the cable tray with cover in outdoor installations, cable trays should be counted withstand the maximum load of snow and other effects. Cable tray width b determination with the different power cables and control cables duty rather different. As the power cable in the bridge are generally single-level emissions, cable tray factory, so the installation of the bridge width b is: b = n1 (d1 + k1) + n2 (d2 + k2) + n3 (d3 + k3) + ...... Where: d1, d2, d3 ...... within the outer diameter of the cable tray of various units of mmn1, n2, n3 ...... the number of the same kinds of the above-mentioned model specification cable. K1, k2, k3 ...... spacing when said cable is placed. The value should be greater than 1/4 of the minimum diameter of the cable. In general, the control cable may be arranged both horizontally in the tray to be stacked. [Chai Jin cable tray to recommend the star product - bridge] cable bridge cable bridge load load into the load, dynamic load and the additional load. Static load refers to the laying of cables in the cable tray types, root number, diameter of each of the weight / unit length, according to the different routes of cable laying Lists Statistics respectively. Dynamic load refers to the weight of the cable tray installation and maintenance during construction maintenance personnel. For lightweight cable tray, slotted cable bridge, generally do not consider dynamic load, that is not allowed on the bridge station (line), and if people need to consider the station, they should be appropriately reduced span. Additional load refers to load only outdoor ice, wind and electromagnetic force formed, it is the nature of the installation site and the region's natural weather conditions related to live body, the design should be calculated according to various conditions. Cable tray standard, integrity manufacturers of cable tray, cable tray Lijiang Chai Jin from the Tianjin cable bridge Limited. Chai Jin Tianjin Cable Bridge Co., Ltd. (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.