Installation of 1 6-meter wide cable tray support

A 1.6-meter wide cable tray requires robust structural support, typically using suspended or wall-mounted brackets spaced according to load and tray type, ensuring compliance with standards like NEC 392 and BS EN 61537.

Support Spacing and Load Considerations

For wide cable trays such as 1.6 meters, support spacing is critical to prevent sagging and maintain structural integrity. Ladder-type trays generally allow spans of 1.5 to 2 meters between supports for heavy power cables, while ventilated troughs may require closer spacing due to continuous cable load . The exact spacing depends on:

• Tray material (steel, aluminum, or FRP)
• Cable weight and fill
• Environmental factors (vibration, wind, or seismic activity) Supports must be designed to withstand imposed loads, including the weight of cables, potential short-circuit forces, and environmental loads like wind or snow .

Types of Supports

1. Suspended Supports: Rods or threaded hangers from ceilings, often with crossbars to distribute load evenly. Center suspensions are recommended for very wide trays to prevent bending .
2. Wall-Mounted Brackets: Used when trays run along walls; brackets should be reinforced and spaced to handle the tray width and cable weight .
3. Floor or Structural Beam Supports: For trays running at low levels or across open spaces, rigid supports or frames may be required.

Installation Best Practices

• Inspect materials: Ensure trays, brackets, and fasteners match approved specifications and are free from damage .
• Route marking: Mark horizontal and vertical runs according to approved shop drawings, maintaining clearance for cable pulling and future maintenance .
• Leveling: Ensure trays are level and aligned; use shims or adjustable hangers if necessary.
• Secure fasteners: Use bolts, clamps, or brackets designed for the tray type; avoid improvising with incompatible hardware .
• Bonding and grounding: All metallic trays must be properly bonded to prevent electrical hazards .
• Cable management: Tie cables at intervals to prevent sagging and maintain airflow, especially for ladder trays .

Material Selection

• Steel trays: Strong and durable, suitable for heavy power cables.
• Aluminum trays: Lightweight and corrosion-resistant, ideal for long spans.
• FRP trays: Non-conductive and corrosion-resistant, suitable for chemical or high-moisture environments .

Summary

For a 1.6-meter wide cable tray, use robust, closely spaced supports, preferably suspended or wall-mounted, designed to handle the full cable load. Follow NEC 392, BS EN 61537, and manufacturer guidelines for spacing, material, and installation. Proper leveling, secure fastening, and bonding are essential for safety, durability, and ease of maintenance .