Distance between cable tray anti-sway brackets

Anti-sway brackets for cable trays should generally be installed at intervals not exceeding 1.5 meters, with additional support near joints and changes in direction.

Recommended Spacing

For standard cable tray installations, anti-sway or lateral support brackets are typically spaced every 1.2 to 1.5 meters along the tray length to prevent lateral movement and maintain stability under load . This spacing may vary depending on:

• Tray width and height: Wider or taller trays may require closer spacing.
• Cable weight: Heavier cable loads reduce the allowable distance between supports.
• Environmental conditions: Areas subject to vibration, wind, or seismic activity may require more frequent supports.

Support Near Joints and Direction Changes

All horizontal and vertical changes of direction in the cable tray system must be supported immediately adjacent to the joints, typically within 150 mm of the connection . This ensures structural integrity and prevents sagging or lateral displacement at critical points.

Compliance and Safety Considerations

• Cable trays must be supported in a way that prevents undue mechanical strain on cables and terminations, in line with BS 7671 and IET guidance .
• Fire-resistant materials should be used for all supports to ensure circuit integrity in case of fire .
• For ceiling or wall-mounted trays, cantilever brackets (e.g., TKS, KTA series) may be used, with threaded rod suspensions or direct mounting to the structure, depending on load and installation type .

Practical Tip

When planning anti-sway bracket placement:

1. Measure the tray length and identify all joints, bends, and direction changes.
2. Install brackets at regular intervals of 1.2–1.5 meters.
3. Add extra brackets near joints, bends, or heavy cable sections.
4. Verify that the selected brackets and fasteners are rated for the expected load and environmental conditions. By following these guidelines, cable trays will remain stable, safe, and compliant with relevant standards.