Basic Characteristics of Bridge Tray 

Bridge Tray (Cable Tray) is an open or closed structural system used to support, protect and manage cables (power, communication, control, etc.), which is widely used in the fields of construction, industry, electric power, and data centre. The following are its basic features: 

1. Main Types of Bridge Tray 

(1) Ladder Cable Tray 

Structure: composed of side beams on both sides and transom (similar to ladder), open design.

Characteristics: good ventilation and heat dissipation, strong carrying capacity, suitable for large diameter cable or high load environment.

Applications: power engineering, industrial plants, data centres, etc.

(2) Trough Cable Tray 

Structure: U-shaped closed or semi-closed structure with cover.

Features: dust-proof, moisture-proof, anti-electromagnetic interference (EMI), suitable for precision cables (e.g. optical fibre, weak power system).

Applications: office buildings, hospitals, communication rooms, etc.

(3) Pallet type bridge (Solid Bottom Cable Tray) 

Structure: solid or perforated steel plate at the bottom, with baffles on the side.

Characteristics: Between ladder type and trough type, taking into account the carrying capacity and protection.

Applications: factories, substations, commercial buildings, etc.

(4) Wire Mesh Cable Tray 

Structure: woven metal mesh, open design.

Features: light weight, flexible installation, excellent heat dissipation, suitable for data centres and IT server rooms.

Applications: data centre, server room, 5G base station, etc.

2. Basic features of bridge 

(1) Material 

Steel bridge (galvanised, stainless steel): high strength, corrosion-resistant, suitable for industrial environment.

Aluminium alloy bridge: light weight, oxidation-resistant, suitable for data centre and clean room.

Fibreglass reinforced plastic bridge (FRP): insulation, corrosion resistant, suitable for chemical and marine environment.

(2) Load carrying capacity 

Light type (C1 grade): ≤125kg/m (e.g. weak power, communication cable).

Medium duty (C2 grade): 125~250kg/m (e.g. ordinary power cables).

Heavy-duty (C3 level): >250kg/m (such as high-voltage cables, industrial environment).

(3) Installation method 

Hanging (ceiling suspension) 

Wall mounting (wall fixing) 

Floor mounting (ground support) 

(4) Protection performance 

Fire protection (galvanized, fireproof coating) 

Corrosion prevention (stainless steel, hot-dip galvanized) 

Electromagnetic interference prevention (metal-enclosed bridges) 

3. Bridge application scenarios 

Types Applicable scenarios 

Ladder bridge Power engineering, factories, transformer substations 

Trough bridge Office buildings, hospitals, data centres (anti-interference) 

Grid format Bridges Data centre, 5G base station (heat dissipation, flexible cabling) 

Pallet bridge Commercial buildings, industrial plants (balanced load bearing and protection) 

4. Advantages of bridge 

Modular design: easy to expand and adjust cabling.

Improved safety: reduce cable wear, short circuit risk.

Aesthetics and neatness: hides messy cables and improves engineering standardisation.

Convenient maintenance: open structure is easy to check and replace cables.

Summary 

Bridge is the core component of cable management system, which is widely used in electric power, telecommunication, construction and other fields by choosing suitable type (ladder type, trough type, tray type, mesh type) according to the load demand, environmental conditions, protection level and optimizing the performance by combining with the material (steel, aluminium, glass fiber reinforced plastic).