[Chai Jin cable tray to recommend the star product - Bridge] checking the formula: Q = q1 + q2 using the formula: q1 - Cable uniform load (layers of uniform load of maximum value) (kN / m2), is uniformly distributed load tray, ladder or cable tray load; q2-- consider cabling or overhaul how much money ladder bridge, the person's weight equivalent uniform load (kN / m2), q2 values calculate the weight of people in general terms by p = 90kg. Said the concentrated load and uniform load bending moment 2 by Maximum bending moment equal conditions shown in translation: Let pι / 4 = q2ι2 / 8 则 q2 = 2p / ι∵P = 90kg∴q2 = 180 / ι where: P --1 people load (kg) ι - 1 support points spacing (maximum value if the fulcrum distance range) (m) q2--1 human equivalent uniform load (kg / m) based on the preliminary determine the bridge models, specifications and fulcrum distance, consult the manufacturer of the sample data, cross-check the spacing and bridge models, until meet the load requirement. [Chai Jin cable tray to recommend the star product - bridge] 5. Materials Statistics (1) bridge: the statistics of the various models, respectively, the total length of the bridge, in addition to a standard length of the bridge, draw the number of trays outside, an additional 1% -2% of the balance. (2) Column: Column as a unified specification, available divided by the average total length of the bridge column spacing, column number drawn ladder bridge, then increased by 2% to 4% margin. Column Specifications vary as the price ladder bridge, you need statistics separately. (3) supporting arm: total length of the bridge dividing the average distance between the supporting arm, and then increased by 1% to 2% margin ladder bridge which sell extremely total demand. (4) Other components: its body multiplied by a certain percentage (depending on the plant may be) to obtain the total number. [Chai Jin cable tray to recommend the star product - bridge] (2) ladder to the tray unit resistance values ??in Table 2. Table 2 in units of resistance ladder tray (3) cable channel unit resistance values ??in Table 3 (4) When the cable tray installation and connection process as a whole, the ladder each side (or each cable channel) of resistance: R = L (r + 1 / 3r ') where: R-- ladder side, i.e., (cable trays) Length total resistance (mΩ); r-- ladder side resistance per unit length (mΩ / m) r' - Direct plate bolt contact resistance. Quote ladder bridge, cable tray Chai Jin-known brands (certified), Pinggu ladder bridge provided by the Tianjin Chai Jin cable bridge 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.