The bridge is a general term for a continuous rigid structural system composed of straight sections, bends, accessories, supports, hangers, etc., of pallets and ladders, and is used to support cables. It is an installation channel for horizontal wiring and vertical wiring systems. Cable tray is a cable laying device that makes wires, cables, and pipes and cables standardized, serialized, and generalized. Here we need to mention the concept of a tray, many people confuse the tray with the tray, thinking that the function is roughly the same, but in fact, it is not. There is a big difference between the tray and the trunking, mainly: the bridge is mainly used for laying power cables and control cables, and the trunking is used for laying wires and communication cables; The bridge is relatively large (200×100 to 600×200), and the trunking is relatively small; The bending radius of the bridge is relatively large, and most of the trunking is bent at a right angle; The span of the bridge is relatively large, and the trunking is relatively small; Different fixing and installation methods; In some places, the cable tray is not covered, and the trunking is usually all closed with a cover to route the wire, and the cable tray is used to walk the cable. Therefore, we should pay attention when choosing a bridge, so as not to choose the wrong one and fail to achieve the desired purpose.

Traditional cable trays mainly include: trough cable tray, tray cable tray, cascade cable tray, long-span cable tray, combined cable tray, flame retardant FRP cable tray, corrosion-resistant aluminum alloy cable tray, etc. These are also the most widely used bridges in China, and most of them are closed bridges. What type of bridge to use in what environment is a very important question. Trough cable tray is a kind of fully enclosed cable tray, which is most suitable for laying computer cables, communication cables, thermocouple cables and other high-sensitivity system control cables, shielding interference and cable protection in heavy corrosion environment. Tray cable tray, it has the advantages of light weight, large load, beautiful shape, simple structure, easy installation, etc., it is suitable for the installation of power cables, but also suitable for the laying of control cables. The cascade cable tray is suitable for the laying of general straight, light and large cables, especially for the laying of high and low power cables. …… These trays have their own advantages, but they are not as good as open structure trays in terms of energy efficiency and optimized cable performance.

The installation of the bridge is mainly divided into several types: installation along the roof, horizontal and vertical installation along the wall, installation along the shaft, installation along the ground, installation along the cable trench and pipe support, etc. The support (hanging) frame used for installation can be selected as finished products or self-made. The fixing methods of the support (hanging) frame mainly include welding on the embedded iron parts, expansion bolt fixing, etc.

Where there are cables, there are trays. The application range of bridge is quite wide, all walks of life are involved, most of the applications are in data centers, offices, Internet service providers, hospitals, schools/universities, airports and factories, etc., especially the data center and IT room market is a very large part of the future bridge application.