Bridge (Cable Tray) is a structural system used to support and protect cables and wires, which is widely used in the fields of electric power, communication, construction, industry and so on. According to the different materials, structures and uses, the bridge is mainly divided into the following categories: 

1. Classification according to materials 

(1) Steel bridge (metal bridge) 

Galvanised bridge: galvanised surface, rust and corrosion resistant, suitable for general industrial environment.

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

Aluminium alloy bridge: light weight, corrosion-resistant, suitable for data centres, clean plants, etc.

(2) Non-metallic bridge frame 

Fiberglass reinforced plastic bridge frame (FRP): acid and alkali resistant, insulation, suitable for chemical industry, sewage treatment plant.

PVC bridge: moisture-proof, insulation, but lower strength, mostly used for indoor weak power system.

2. Classified by structure 

(1) Ladder Cable Tray 

consists of cross-file and side, good ventilation and heat dissipation, suitable for large-diameter cables or power systems.

(2) Trough Cable Tray 

Fully enclosed structure, dustproof, anti-interference, suitable for data centres, precision equipment wiring.

(3) Tray type bridge (Perforated Cable Tray) 

with holes at the bottom, better heat dissipation, taking into account the protection and ventilation, commonly used in integrated wiring systems.

(4) Wire Mesh Cable Tray 

Open metal grid structure, light weight, flexible installation, suitable for data centres, plants, etc.

(5) Modular Cable Tray 

can be freely assembled, suitable for complex wiring environment, such as intelligent buildings, large factories.

3. Classification according to use 

Power Bridge: carrying high-current cables, such as ladder type, trough type.

Weak power bridge: used for communication, network, monitoring and other signal lines, such as network format, PVC bridge.

Fire-resistant bridge: with fire-resistant coating or flame-retardant materials, suitable for fire-fighting, emergency power supply system.

Large span bridge: used for long-distance overhead laying, such as factory buildings, warehouses and so on. What are the Copper Products 

Copper 

Copper Fields 

Copper Elements 

Copper and its alloys are widely used in many fields, such as industry, construction, electronics and transport. The following are common copper products Classification and examples: 

1. Pure Copper (Violet Copper) Products 

Conductors and Cables: Power transmission, electronic equipment wiring (due to excellent conductivity).

Copper sheet/copper foil: Used in circuit boards (PCBs), electromagnetic shielding materials.

Copper tubes: refrigeration equipment (air conditioners, refrigerators), water supply pipes (corrosion-resistant, anti-bacterial).

Copper rods / copper row: industrial busbar, transformer, switchgear.

2. Copper alloy products 

Brass (copper + zinc): 

Valves, taps, hardware (corrosion-resistant, easy to process).

Musical instruments (such as saxophones, trumpets).

Bronze (copper + tin): 

bearings, gears (wear-resistant), sculpture works of art.

Ancient currency, bells and tripods (e.g. bronze).

White Bronze (Cu+Ni): 

Coins, precision instruments, marine engineering components (seawater corrosion resistant).

3. Industrial and technological applications 

Electronic components: semiconductor leads, integrated circuit substrates.

Heat exchangers: automobile radiators, power plant condenser tubes.

Superconductor materials: e.g. Yttrium Barium Copper Oxygen (YBCO) for strong magnets.

4. Everyday and Decorative Goods 

Kitchenware: copper pots and pans, copper kettles (fast heat conductor, commonly used in high-end cooking utensils).

Crafts: copper statues, jewellery, vintage decorations.

Currency: some coins (e.g., euro 1 cent and 2 cent coins contain copper).

5. Emerging fields 

New energy: lithium battery negative electrode collectors, solar photovoltaic modules.

Antimicrobial materials: hospital door handles, utility surfaces (copper ion sterilisation).

4. Special types of bridges 

Earthquake-resistant bridges: with shock-absorbing structure, suitable for earthquake-prone areas.

Explosion-proof bridge: used in petroleum, chemical and other flammable and explosive environments.

Intelligent bridge: integrated sensors to monitor cable temperature, load and other data.