How to construct cable trays at different angles

Cable trays can be constructed at any angle using pre-fabricated elbows, risers, and live bending techniques, combined with proper cutting and assembly methods.

Using Pre-

Fabricated Elbows and RisersTo achieve angled or vertical runs, elbow joints and risers are commonly used. For example, RVS elbow joints can be inserted into the cable tray and secured with screws, allowing horizontal orientation changes from -90° to +90° and vertical angles from 0° to 90°. These components are designed to maintain structural integrity while supporting cables safely.

Live Bending of Wire Mesh Trays

For wire mesh cable trays, bends, tees, crosses, risers, and reducers can be made on-site using a bolt cutter. The cutter drags a layer of zinc across the cut end, forming a protective layer, and rubber caps can be added to protect exposed ends. This method allows installers to create custom angles without pre-fabricated fittings.

Cutting and Preparing Trays

When cutting cable trays to fit specific angles, use a band saw or angle grinder suitable for the tray material. Always wear PPE such as Kevlar gloves, eye protection, and headgear. Remove any burrs after cutting to prevent damage to cables and ensure safety.

Avoid using torches, as they can weaken the material or damage surface treatments.

Installation Best Practices

Maintain minimum bend radii for cables to prevent damage. Use rung spacing of 150–230 mm for ladder-type trays to support cables evenly. Ensure all components are compatible and tested together to maintain safety and structural integrity.

Avoid using cable trays as walkways or supports for personnel, as this can cause injury and damage the system.

Summary

Constructing cable trays at any angle involves a combination of pre-fabricated fittings, live bending techniques, careful cutting, and proper assembly. Following manufacturer guidelines and safety standards ensures that the tray system supports cables effectively while accommodating complex routing requirements.