(1) Classification according to material 

Steel bridge: 

Galvanised bridge (the most common): galvanised surface, rust and corrosion-resistant, suitable for general environment.

Plastic spraying bridge (colour coating): spraying plastic on the basis of galvanised to enhance the corrosion resistance, suitable for wet, acid and alkali environments.

Stainless steel bridge (304/316): strong corrosion resistance, suitable for chemical, marine and other harsh environments.

Aluminium alloy bridge: light weight, corrosion-resistant, good conductivity, suitable for data centres, communication industry.

Fiberglass reinforced plastic bridge (FRP): insulation, acid and alkali resistance, light weight, suitable for chemical industry, sewage treatment and other corrosive environments.

Plastic bridge (PVC/PE): insulation, anti-corrosion, but lower strength, suitable for light cable laying.

(2) Classification by structure 

Type Feature Applicable scene 

Trough bridge (closed) Fully closed structure, dustproof, anti-interference Data centre, precision electronics, anti-electromagnetic interference places 

Tray bridge (open) Hollow tray at the bottom, good heat dissipation Ordinary power cables, communication cables laying 

Ladder bridge The crossbar is in the shape of a ladder, the best ventilation and heat dissipation Large-diameter cables, high-temperature environments 

Grid-type bridge Metal grid structure, lightweight Flexible Data centre, fibre-optic cabling 

Combination bridge Free assembly of different components Complex cabling requirements