[Chai Jin cable tray to recommend the star product - the bridge] be well grounded according to the specifications of the relevant provisions of the ground fire bridge, galvanized cable tray. (1) Each of galvanized cable tray plate bolts directly contact resistance should be less than 0.005Ω factory fire bridge, then cable tray can be used as the grounding line (dusting cable trays are not suitable for grounding line), the value of each resistor cable tray can be calculated as follows: r = ρ · L / S where: ρ = 15 × 10Ω-6 / cm (20 ℃); L = length calculated according to 100mm; S = cross-sectional area cm2. [Chai Jin cable tray to recommend the star product - the choice of bridge] bridge 1.1 in the engineering design, the bridge shall be arranged based on a comprehensive comparison of economic rationality, technical feasibility, operational security, and other factors to determine the best program, but also to fully meet the construction, installation, maintenance, repair and cabling requirements. 1.2 bridge laying height from the ground level is not lower than in 2.5m, 1.8m following section should be added to the vertical metal plate from the ground to protect fire bridge laying customized, but laid in electrical rooms except when. Horizontal cable tray laid in the device or on the mezzanine troops Road and less than 2.5m, should take measures to protect the ground. [Chai Jin cable tray to recommend the star product - the bridge] in selecting how to sell fire bridge, cable tray manufacturing plant is provided to allow the load should be greater than the actual amount of the total amount of load G. When the cable tray with cover in outdoor installations, cable trays should be counted, etc. The maximum snow load impact. Cable tray width b is determined with the different power cables and control cables work system rather different. As the power cables in the bridge are generally single-level emissions, 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 ...... isoform above the number of model specifications of the cable. K1, k2, k3 ...... pitch of said cable when placed. The value should be greater than 1/4 of the minimum diameter of the cable. In general, control cables can be arranged either horizontally within the bridge can also be stacked. Custom fire bridge Handan fire bridge, known enterprises Chai Jin Chai Jin cable tray cable tray provided by the Tianjin Limited. Chai Jin Tianjin cable bridge Limited (www.tjcjdlqj.com) strong, credible, in Tianjin metal building materials industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Chai Jin cable tray and you hand into the brilliant, for a better future!