How to fix a 45-degree bend in a cable tray

Yes, it is acceptable to make a 45-degree bend in a cable tray, typically using a mitered joint or a pre-fabricated 45-degree fitting.

Methods for Creating a 45-Degree Bend

1. Using Pre-Fabricated 45° Fittings Many cable tray systems offer pre-manufactured 45° flat or vertical bends for light, medium, and heavy-duty trays. These fittings are available in various widths and materials, including mild steel (pre-galvanized or hot-dip galvanized) and stainless steel, and can include closed or ventilated covers for protection . Using these fittings ensures compliance with industry standards and reduces installation complexity. 2. Fabricating a 45° Bend (Mitered Joint) If a pre-fabricated fitting is not available, a 45-degree bend can be made by cutting two separate tray sections at 22.5° angles from a perpendicular line across the tray width. The cuts on the second piece are made in the opposite direction to allow the two pieces to join and form a smooth 45° turn . Key steps include:

• Measure and mark the perpendicular line on each tray section.
• Use a protractor to mark 22.5° angles.
• Cut using an appropriate tool, such as an angle grinder with a metal cutting disc.
• Deburr and smooth all edges to prevent cable damage and ensure safety.
• Join the two pieces securely with cable tray connectors and hardware.

Safety and Installation Considerations

• Bend Radius: Ensure the bend does not exceed the minimum bend radius recommended for the cables being installed to avoid insulation damage.
• Edge Protection: Smooth or cover sharp edges after cutting to protect cables.
• Structural Integrity: Verify that the joined sections are properly supported and aligned to maintain the tray's load-bearing capacity.
• Material Compatibility: Use fittings or fabricated bends compatible with the tray material (steel, stainless steel, fiberglass, etc.), .

Summary

A 45-degree bend in a cable tray is both feasible and commonly used in installations. The safest and most reliable approach is to use pre-fabricated 45° fittings, but a properly executed mitered joint with two 22.5° cuts is also acceptable if done carefully, ensuring smooth edges, correct alignment, and adequate support .