What are the Main Types of Cable Trays?

1. Introduction to Cable Trays
Cable trays are protective structures designed to safeguard cables from external damage. Composed of brackets, supports, and installation accessories, they are widely used to organize and shield cables in environments such as underground parking lots, industrial plants, and outdoor installations. Common types include ladder-type cable trays, solid-bottom cable trays (trough-type), and perforated cable trays (ventilated tray-type). All components are galvanized for corrosion resistance, allowing installation in both indoor and outdoor settings, including building facades and pipe racks.

2. Main Types of Cable Trays

• Solid-Bottom Cable Tray (Trough-Type):
  A fully enclosed design ideal for shielding sensitive cables like computer, communication, and thermocouple cables. It offers excellent protection against electromagnetic interference and corrosion, making it suitable for harsh environments.
• Ladder-Type Cable Tray:
  Characterized by its ladder-like structure with crossbars for reinforcement, this type is lightweight, cost-effective, and highly durable. Its open design ensures superior ventilation, making it ideal for large-diameter power cables and high/low-voltage applications.
• Perforated Cable Tray (Ventilated Tray-Type):
  A semi-enclosed design similar to the trough-type but with perforations for airflow. It combines lightweight construction, high load capacity, and aesthetic appeal, suitable for both power and control cable installations.

3. Materials and Surface Treatments for Cable Trays

Material Categories:

• Galvanized Steel Cable Trays: Made from cold-galvanized rolled steel sheets. The steel undergoes chemical cleaning and electroplating with zinc oxide to form a protective layer.

• Aluminum Alloy Cable Trays: Extruded from high-precision aluminum alloy, these trays are lightweight, corrosion-resistant, and durable due to a natural oxide film formed by sandblasting and oxidation.

• Stainless Steel Cable Trays: Constructed from 304-grade stainless steel, offering superior performance and longevity without additional surface treatment.

Surface Treatment Categories:

• Electrostatic Powder-Coated Trays: Galvanized trays coated with anti-corrosive, wear-resistant, and waterproof powder, available in customizable colors.

• Fire-Retardant Painted Trays: Coated with heat-resistant, waterproof, and corrosion-resistant fire-retardant paint.

Hot-Dip Galvanized Trays: Steel trays immersed in molten zinc at 600°C to form a thick, durable zinc layer for enhanced protection.

Key Advantages:

• Versatility: Suitable for diverse environments, including corrosive and high-temperature settings.
• Durability: Engineered for long-term performance with minimal maintenance.
• Customization: Available in multiple materials, finishes, and colors to meet project-specific requirements.