Arc-shaped cable tray supports are installed by using appropriately spaced support brackets or hangers, ensuring the tray follows the curve while maintaining structural integrity and proper load distribution.

Planning and Preparation

Before installation, determine the radius of the arc and the type of cable tray (ladder, ventilated trough, or solid-bottom). Ensure the tray and support components are compatible and rated for the expected load, including cables and environmental factors such as wind or vibration . Identify the mounting surface (ceiling, wall, or structural beam) and verify it can support the combined weight of the tray and cables .

Selecting Support Elements

Use support brackets, wall brackets, or suspended hangers designed for curved or bend sections. For arc-shaped trays, center-hung or trapeze supports are recommended to allow the tray to flex along the curve while maintaining stability . Ensure all support elements are manufactured according to standards such as BS EN 61537 for cable trays and BS 6946 for channel supports .

Installation Steps

1. Mark the Arc Path: Lay out the intended curve on the mounting surface, marking positions for each support. Support spacing should follow manufacturer recommendations, typically every 1.2 to 1.8 meters for ladder trays, but may be reduced for tighter curves or heavier loads .
2. Install Hangers or Brackets: Attach vertical hangers or wall brackets at the marked positions. For suspended supports, thread hex nuts and washers as needed to adjust height and level the cross member . Ensure all supports are plumb and level to prevent sagging.
3. Attach the Arc-Shaped Tray: Place the tray onto the supports, aligning it with the curve. Use tray clips or fasteners to secure the tray to the support brackets. For ladder trays, clips can be installed inside or outside the tray depending on space and accessibility .
4. Adjust and Level: Fine-tune the height and alignment of each support to ensure the tray follows the arc smoothly. Check that the tray is level along the curve and that there is no undue stress on joints or bends .
5. Verify Load and Clearance: Confirm that the tray can safely carry the intended cable load without exceeding the maximum support spacing or load rating. Maintain the minimum bend radius for cables to prevent damage .
6. Bonding and Grounding: Ensure all tray sections are properly bonded and grounded according to electrical codes, especially for metallic trays .

Final Checks

• Inspect all fasteners and supports for tightness and stability.
• Verify that the arc maintains the correct radius and that cables can be installed without sharp bends.
• Confirm compliance with relevant standards and manufacturer guidelines . By following these steps, arc-shaped cable tray supports can be installed safely and effectively, providing reliable cable management while accommodating curved routing paths.