Cut corner of cable tray support

Corners of cable tray supports can be safely cut and modified on-site using proper tools, techniques, and safety precautions to maintain structural integrity and compliance.

Tools and Techniques

When cutting cable tray supports, the choice of tool depends on the tray material and type: Band saws are recommended for most modular metal trays, including ladder and channel supports, as they provide precise cuts with minimal burrs and debris. Use a blade suitable for the material thickness and type, and always remove any sharp edges after cutting. Circular saws with guarded blades and chip collectors are effective for light channels and cable ladders, offering accurate cuts while reducing contamination and risk of injury.

Angle grinders can be used when other tools are impractical, but they produce more sparks and debris and require careful handling with both hands to avoid accidents. Cutting torches are generally not recommended, as they can damage surface treatments and weaken the material. For wire mesh cable trays, strategic side cuts allow smooth corner transitions.

Maintaining the proper bend radius is essential to prevent damage to Ethernet or fiber cables.

Safety Considerations

Always wear Kevlar gloves, eye protection, and appropriate PPE when handling and cutting trays. Avoid mixing cutting blades between different metals (e.g., stainless steel and galvanized steel) to prevent galvanic corrosion. Protect surrounding materials from sparks and overheating during cutting.

Installation Best Practices

After cutting, verify grounding and bonding to ensure electrical safety. Avoid overfilling trays at corner sections to maintain proper cable support and airflow. For modular systems, follow manufacturer guidelines for cutting intervals and lengths to preserve structural integrity.

When possible, use factory-made fittings for standard angles, but field modifications are acceptable for irregular walls, columns, or tight spaces. By following these guidelines, corners of cable tray supports can be modified safely and efficiently while maintaining compliance with standards such as BS EN 61537 and NEC Article 392.