[Chai Jin cable tray to recommend the star product - bridge] grounded in accordance with the relevant provisions of norms, galvanized cable tray good grounding. (1) galvanized cable tray bolts directly to the contact resistance of each plate should be less than 0.005Ω, this time as a grounding line cable tray (dusting cable trays are not suitable for ground lines), trough cable bridge, the resistance of each cable tray value can be calculated as follows: r = ρ · L / S where: ρ = 15 × 10Ω-6 / cm (20 ℃); L = length calculated 100mm; S = cross-sectional area cm2. [Chai Jin cable tray to recommend the star product - bridge] Selection Procedure trays (1) to determine the width of the bridge, the number of layers, the anchor type and spacing, as well as cable distribution in the layers of trays. (2) the calculation of each cable uniformly distributed load (kN / m2), initially identified the bridge models, specifications. (3) The maximum total cable uniform load value checking bridge strength. [Chai Jin cable tray to recommend the star product - bridge] support and hanger configuration 1, the indoor branch, hanging a short span generally take 1.5-3m. Outdoor column in the span generally taken 6m. 2, support and hanger configuration on non-linear segment following principles. When the tray width 300mm, Cascade cable bridge, in addition to meeting the following conditions, Handan cable bridge, in the middle of a non-linear segment also added support and hanger. 3, multi-set bridge center distance between the layers 200, cable tray factory, 250,300,350mm. 4, the bridge line segment should remain joints every 50m 20-30mm (metal bridge). Cascade cable bridge, Chai Jin cable tray, cable tray Handan 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.