Trough-type cable tray climbing

Trough-type cable trays provide continuous support for medium-weight cables and can be safely used in vertical or inclined runs with proper support and installation.

Overview of Trough-

Type Cable TraysTrough-type cable trays are designed to offer continuous support and protection for cables, combining the strength of ladder trays with the protection of solid-bottom trays. They are typically used for medium-weight power, control, and communication cables and are available in ventilated or solid-bottom designs. Ventilated trough trays allow airflow to dissipate heat while maintaining structural integrity.

Materials commonly used include aluminum, galvanized steel, stainless steel, and PVC-coated steel, providing options for indoor, outdoor, and corrosive environments.

Climbing and Vertical Installation

When installing trough-type trays in vertical or inclined runs, several factors must be considered: Support Frequency: Vertical sections require secure anchoring to walls, structural steel, or dedicated supports at intervals recommended by the manufacturer to prevent sagging or excessive deflection. Rungs and Bottom Design: The tray bottom may be flat or corrugated. Corrugated bottoms are three times stronger and 21 times stiffer than flat sheets, which is beneficial for vertical climbing as it reduces bending under cable weight.

Cable Securing: Cables should be tied or clamped to the tray rungs to prevent movement during installation and operation. Rungs provide convenient anchor points for cable ties, ensuring cables remain in position along vertical runs. Load Considerations: Ensure the tray's load rating exceeds the total weight of all cables, including future additions.

Overloading can compromise structural integrity, especially in vertical climbs.

Best Practices

Plan the Route: Map the entire vertical or inclined path, avoiding interference with other utilities and ensuring smooth transitions at bends or tees. Use Proper Fittings: Employ vertical bends, risers, and splice plates to maintain continuous support and alignment of the tray. Material Selection: Choose materials suitable for the environment.

For corrosive or outdoor conditions, stainless steel or PVC-coated trays are recommended. Safety Compliance: Follow NEMA, UL, and CSA standards for installation, ensuring the tray system meets mechanical and electrical safety requirements.

Advantages of Trough Trays in Climbing Applications

Continuous Cable Support: Reduces stress on cable insulation and prevents sagging. Ventilation: Ventilated designs help dissipate heat in vertical runs. Ease of Maintenance: Open-top or ventilated designs allow easy access for cable inspection and future modifications.

Structural Strength: Corrugated or reinforced bottoms provide rigidity for vertical installations. By following these guidelines, trough-type cable trays can be effectively used for vertical or inclined cable runs, ensuring both cable protection and system reliability.