FRP bridge (FRP bridge) is a kind of cable tray made of Fiberglass Reinforced Plastic (Fiberglass Reinforced Plastic) as the main material, which has the following significant advantages and is suitable for many special environments:

1. Strong corrosion resistance

Resistant to chemical corrosion: it can withstand acid, alkali, salt, organic solvents and other chemical media, suitable for chemical industry, petroleum, sewage treatment and other corrosive environments.

Rust and waterproof: no rust, no mildew, more suitable than metal bridge (such as galvanised steel, aluminium alloy) for humid, coastal or underground projects.

2. Light weight and high strength

Light weight: the density is only 1/4 of steel and 2/3 of aluminium alloy, which saves effort in installation and handling and reduces the load of bracket.

High mechanical strength: good impact resistance, bearing capacity close to steel, and not easy to be deformed.

3. Excellent insulation performance

Non-conductive: high insulation resistance, avoiding electromagnetic interference and the risk of leakage, suitable for electric power, communications and other scenarios with high insulation requirements.

No eddy current loss: compared with metal bridge, no need to do extra anti-eddy current treatment.

4. Weather resistance and long life

UV resistance: some products add anti-UV agent, outdoor use is not easy to aging, life expectancy of more than 20 years.

Wide temperature adaptability: stable performance in the range of -40℃~120℃ (metal bridge is easy to be brittle in low temperature or deformed in high temperature).

5. Convenient installation and maintenance

Convenient cutting: can be cut and drilled with common tools, no special equipment is needed.

Maintenance-free: no need to paint the metal bridge regularly to prevent rust and reduce the long-term cost.

6. Fireproof and flame retardant

Through modification, it can reach B1 level flame retardant (flame retardant), slow flame spreading speed, reducing fire risk.

7. Environmental protection and economy

No heavy metal pollution: recyclable, in line with environmental requirements.

Comprehensive low cost: although the unit price is slightly higher than galvanised steel bridge, it saves anti-corrosion and maintenance costs, and is cost-effective in the long run.

Comparison of FRP bridge vs traditional metal bridge

Characteristics FRP bridge metal bridge (galvanised steel/aluminium alloy)

Corrosion resistance Extremely strong, suitable for chemical industry, marine environment Need to be plated to protect, easy to rust for a long time. 

Light weight (1/4 steel weight) Heavier 

Insulation Excellent, no EMI Additional insulation required 

Lifespan 20+ years 10-15 years (regular maintenance required) 

Costs High upfront, economical in the long term Low upfront, high maintenance costs 

Typical applications

Chemical/pharmaceutical plants: acid and alkali resistant cable laying.

Subway/tunnel: underground works with high requirement of moisture-proof and fire-proof.

Power plants/substations: insulated and anti-interference power channels.

Coastal facilities: salt spray corrosion-resistant bridge and dock power supply system.