How to install a simple elbow on a cable tray

A simple elbow on a cable tray can be installed by cutting, bending, and fastening the tray to form a 90-degree or 45-degree angle, ensuring proper support at the joints.Tools and Materials Needed

• Straight cable tray section
• Cutting tools (angle grinder with cutting disc or hacksaw)
• Measuring tape, marker, and set square or protractor
• Drill with appropriate bits
• Nuts, bolts, and washers for fastening
• Cold galvanizing spray for rust protection (if metal tray)

Steps to Create a 90° Elbow

1. Mark the Center Line: Determine the position of the bend and draw a straight line across the tray base to indicate the center of the elbow .
2. Mark 45-Degree Cuts: Measure equal distances on both sides of the center line (typically 45mm to 82mm depending on tray width) and mark the cuts .
3. Cut the Side Channels: Use an angle grinder or hacksaw to cut the tray flanges at a 45-degree angle, stopping at the base .
4. V-Notch the Base: Remove V-shaped sections from the tray base where the bend will occur so the sides can close together .
5. Bend and Assemble: Carefully bend the tray to form the 90-degree angle and align the edges. Fasten the sections together using bolts, nuts, and washers .
6. Protect the Metal: Apply cold galvanizing spray to exposed metal edges to prevent rust .

Support and Installation Considerations

• Ensure support at the elbow joints: vertical elbows should be supported at the top and within 610mm of the bottom joint .
• Maintain proper tray alignment and spacing to prevent sagging or stress on cables .
• For multiple bends, a 90-degree elbow may be constructed using three segments, while a 45-degree elbow uses two segments . By following these steps, you can create a secure and functional elbow in a cable tray system, ensuring smooth cable routing and structural stability.