Structure and material

Cable tray: usually made of metal materials, such as steel plate, galvanised plate, etc., the structure is flat plate-like, with a certain thickness and width, and the edge has a certain height, used to support cables.

Bridge: Usually made of aluminium alloy, steel-aluminium alloy, etc. It consists of a number of interconnecting brackets, elbows and accessories to form a closed channel for threading pipes, wires and cables.

Usage

Cable tray: mainly used for indoor cable support and protection.

Bridge: mostly used for outdoor cable wiring and threading system, especially in power distribution and communication engineering.

Scope of application

Cable tray: used to support and protect various cables and wires, suitable for indoor environment.

Bridge: mainly used for large cable and supporting equipment threading, suitable for outdoor and large engineering projects.

Installation method

Cable tray: needs to be fixed on the wall or ceiling by means of fixings or steel lifting.

Bridge: need to be fixed on the wall or bracket by connectors and brackets.

Other differences

Heat dissipation and ventilation: Bridges usually have better heat dissipation and ventilation properties as they are usually of open construction.

Flexibility: Bridges are more flexible in design and can be adjusted and expanded as needed.

In summary, cable trays and bridges have obvious differences in terms of structure, usage, application scope and installation methods, etc. The choice of which equipment depends on the specific use scenario and needs.