The bridge is a support for supporting and placing cables. The bridge is widely used in the project. As long as the cable is laid, the bridge must be used. The cable bridge is divided into trough type cable bridge, tray type cable bridge, ladder type cable bridge, grid bridge and other structures; It is composed of bracket, bracket and installation accessories. What requirements should the composition of cable tray meet? Shandong cable bridge manufacturer explains to you:
The composition of cable tray shall meet the requirements of strength, rigidity and stability, and shall meet the following requirements:
① The bearing capacity of the bridge shall not exceed the value of dividing the large load when the bridge initially produces permanent deformation by the safety factor of 1.5;
② The relative deflection of ladder and tray under the allowable safe working load should not be greater than 1/200 for steel; Aluminum alloy shall not be greater than 1/300;
③ The ratio of deflection to arm length of steel joist under allowable load should not be greater than 1/100;
④ The cable bridge of the safety-level circuit of the nuclear power plant shall meet the design requirements of seismic Category I items, and the seismic design shall be carried out using both the operational safety seismic vibration and the ultimate safety seismic vibration.
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