Installation of anti-sway brackets at the end of cable trays

Anti-sway brackets stabilize cable trays, preventing lateral movement and reducing stress on supports and cables.

Purpose of Anti-

Sway BracketsAnti-sway brackets are used to prevent swaying or swinging of cable trays, which can occur due to vibrations, wind, or seismic activity. Uncontrolled movement can lead to mechanical stress, fatigue, and potential failure of the tray supports and attached cables. They are particularly important for long cable tray runs, overhead installations, or areas prone to seismic activity.

Types of Anti-

Sway SolutionsPLP Anti-Sway Brackets: These secure the bottom of cable spacers or trays at tangent poles or support points to prevent lateral movement of cable bundles.

Speed Link SL

K with Y-Hook: This system attaches to wire basket trays, cable trays, or cable ladders. Hooks can be installed at a 45-degree angle to provide sway control, effectively stabilizing the tray without overloading the support. Seismic Bracing Kits: Kits like those from Legrand include threaded rods, sway braces, and predrilled tabs for direct attachment to concrete decks.

These are designed for long runs and trapeze installations, with recommended spacing of at least every 30 feet.

Installation Guidelines

Attachment Points: Secure the anti-sway brackets to the tray's side rails or bottom, depending on the hardware type. For trapeze or ceiling-mounted trays, connect to threaded rods or structural supports. Spacing: Typical spacing for sway control is every 30 feet, but this may vary depending on tray length, load, and environmental conditions.

Orientation: Brackets can be installed lengthwise or transverse relative to the tray to counteract movement in multiple directions. Load Considerations: Ensure that the tray supports can handle the additional load from the anti-sway brackets and any attached cables.

Best Practices

Use hardware compatible with the tray type (ladder, ventilated trough, or wire basket). For outdoor or corrosive environments, select corrosion-resistant materials. Verify compliance with NEC Article 392 and local building codes for cable tray support and bracing.

Inspect and tighten brackets periodically to maintain stability over time. By following these guidelines, anti-sway brackets can effectively enhance the structural integrity of cable tray systems, reduce mechanical stress, and improve safety and longevity of electrical installations.