Bridge (cable bridge) is an important facility used to support and protect cables and pipelines in modern buildings, industries and infrastructures, and the necessity of which is mainly reflected in the following aspects: 

1. Cable management and protection 

Orderly routing: bridge provides regular laying paths for cables, fibre optic cables, and weak electrical wires, etc., avoiding clutter and making it easy for maintenance and capacity expansion.

Physical protection: to protect the cable from mechanical damage (such as extrusion, friction), chemical corrosion (such as acid and alkali environments) or animal bites.

Fire retardant: metal bridge (such as galvanised steel, aluminium alloy) or fireproof bridge can delay the spread of fire and improve safety.

2. Safety and Reliability 

Electrical Isolation: Through layering and slotting design, it avoids mutual interference between strong power (power cable) and weak power (signal line) and reduces electromagnetic interference (EMI).

Heat dissipation performance: open bridge or mesh bridge is conducive to cable heat dissipation, preventing overheating and causing failure.

Grounding protection: metal bridge can be used as a grounding conductor to enhance the safety of the electrical system.

3. Flexibility and expandability 

Modular design: the bridge can be flexibly spliced, extended or branched to adapt to different building structures and equipment layout.

Convenient expansion: no need to re-lay the pipeline when adding new cables, directly laying along the bridge, saving time and cost.

Adapt to complex environment: it can pass through the ceiling, underground, shafts and other narrow or special spaces.

4. Economy and Construction Efficiency 

Reduce installation cost: compared with buried pipes or direct buried cables, the bridge construction is faster, reducing trenching, backfilling and other processes.

Reduce material waste: cable length can be accurately calculated to avoid redundant laying.

Convenient maintenance: When troubleshooting or replacing cables, there is no need to damage the building structure, and the bridge cover can be opened directly.

5. Industry norms and compliance 

Compliance with standards: Domestic and international standards (such as GB 50217 ‘Electric Power Engineering Cable Design Code’, NEC U.S. National Electrical Code) require cable laying to be done through the bridge or trunking.

Acceptance guarantee: The standardised bridge system is necessary for project acceptance to ensure long-term safe operation.

6. Application Scenarios 

Building field: office buildings, shopping malls, hospitals and other strong and weak power systems.

Industrial field: factory production line, substation, data centre.

Transportation facilities: cable laying in subways, airports, tunnels.

Communication network: cable support for 5G base station and fibre optic backbone network.