Ladder cable tray related functions and methods of use

The bridge (cable bracket) is the full name of a rigid structural system with a tightly supported cable consisting of a straight section of a pallet or ladder frame, a bend, a component, and a support arm (arm bracket), a hanger, and the like.

Selection points:

1) Bridges, trunkings and their hangers are used in aggressive environments. They should be made of corrosion-resistant rigid materials or treated with anti-corrosion treatment. The anti-erosion treatment should meet the requirements of engineering environment and durability.

2) In the section with fire protection requirements, the bridge can be added with materials such as plates or nets with refractory or non-combustible functions in the cable ladder and tray to form a blockade or semi-blocking structure, and adopt the bridge and its support and hanger. Measures such as fire-retardant coating on the surface, the overall refractory function should meet the requirements of relevant national standards or standards.

3) It is not advisable to use aluminum alloy bridges in places where engineering fire protection requirements are high.

4) The selection of the width and height of the cable ladder should meet the filling rate requirement. The filling rate of the ladder ladder of the cable is generally 40% to 50% for the power cable, and 50% to 70% for the control cable. Leave 10% to 25% of engineering development margin.

5) When selecting the load level of the cable ladder, the uniform load of the bridge should not be greater than the rated uniform load of the selected bridge load grade. If the actual span of the support of the bridge is not 2m, then work. Uniform loads should meet the requirements.

6) Under the premise of satisfying the corresponding load, the various components and supporting hangers should match the specifications of the pallet, the straight section of the ladder frame and the curved series.

7) When selecting the bend or lead-up or lowering device of the bridge, it should not be less than the minimum allowable bending radius of the cable in the bridge.

8) For steel bridges with spans greater than 6 m and aluminum alloy bridges with spans greater than 2 m or with load requirements greater than load class D, calculations or test verifications for strength, stiffness and non-disruptive properties shall be carried out according to the engineering premise.

9) When several sets of bridges are laid in parallel at a uniform height, maintenance and inspection intervals should be considered between adjacent cable trays.

Aluminum Cable Trays, Fiberglass Cable Trays, Steel Cable Trays