1. Material characteristics

Common material:

Steel bridge: galvanised steel, stainless steel (304/316), aluminium alloy and so on.

Galvanised steel: rust-proof, low cost, suitable for general environment.

Stainless steel: corrosion-resistant, used in harsh environments such as chemical and marine.

Aluminium alloy: lightweight, oxidation-resistant, suitable for data centres or clean workshops.

Surface treatment: hot-dip galvanising, electrostatic spraying, anodic oxidation, etc., to enhance corrosion resistance and aesthetics.

2. Structural design

Open structure: easy for heat dissipation and maintenance, suitable for dense wiring scenarios.

Various types:

Ladder type bridge: traverse is in the shape of ladder, strong load-bearing, suitable for large diameter cables.

Trough bridge: fully enclosed design, dustproof, anti-interference, for precision lines.

Tray type bridge: perforated tray at the bottom, taking into account the ventilation and load bearing.

Grid-type bridge: composed of metal grids, lightweight and highly flexible (e.g. data centres).

3. Mechanical properties

High load-bearing capacity: can withstand the weight of cables and external pressure (such as snow load, wind load).

Fire resistance: the metal material itself is non-combustible and meets fire protection requirements (some require additional fire protection coatings).

Vibration resistance: connected by bolts or clips, high stability and adaptable to vibration environment.

4. Installation and maintenance

Modular design: standard length (2m/3m, etc.), flexible splicing, turning or lifting.

Rich accessories: bracket, connecting piece, grounding wire, etc., to adapt to complex wiring needs.

Convenient maintenance: open structure makes it easy to add, remove or replace cables.

5. Application Scenarios

Industrial field: factory power system, petrochemical equipment cable laying.

Civil buildings: shopping malls, hospitals, subways, strong and weak power cabling.

Data centre: cable management of high-density server room.

Outdoor engineering: weather-resistant cabling in bridges and tunnels.

6. Comparison of advantages (vs. non-metallic bridge)

Characteristics Metallic bridge Non-metallic bridge (e.g. PVC, FRP)

Strength High, resistant to pressure and impact Lower, easy to age and brittle 

Fire resistance Excellent (non-combustible) Poor (may be combustible) 

Lifespan Longer (20+ years) Shorter (5-10 years) 

Cost Higher Lower 

Electromagnetic shielding Shields against interference No shielding effect