A 45-degree cable tray bend is typically achieved by making two 22.5-degree miter cuts on separate tray sections and joining them to form the desired angle.

Step-by-Step Technique

1. Measure and Mark:

• Draw a perpendicular line across the width of the cable tray.
• Using a protractor or angle finder, mark a 22.5-degree angle from this perpendicular line on each tray section. The second tray piece should have the cut in the opposite direction to allow proper joining . 2. Cutting the Tray:
• Use an appropriate cutting tool, such as an angle grinder with a metal cutting disc for metal trays or a suitable saw for fiberglass trays.
• Carefully cut along the marked 22.5-degree lines.
• Deburr and smooth all edges to prevent cable damage and ensure safety . 3. Assembly:
• Align the two cut sections so that the angled edges meet, forming a 45-degree bend.
• For trays with flanged edges, you may need to file or remove a portion of the lip to allow the sections to overlap and fit snugly .
• Secure the joint using bolts, rivets, or the manufacturer's recommended fasteners. 4. Safety Precautions:
• Always wear safety glasses, gloves, and ear protection during cutting and assembly.
• Ensure the tray is supported properly to prevent movement while cutting.

Formulas and Practical Tips

• To calculate the cut length for a flat 45-degree bend, take the desired bend angle (45°) and divide by 2, giving 22.5° per tray section .
• For different tray widths, measure from the centerline and mark the cut points accordingly.
• It is recommended to practice on cardboard or scrap material before cutting the actual tray to ensure accuracy .

Fiberglass Tray Considerations

• Fiberglass trays follow similar principles but may require specialized cutting tools and adhesive or mechanical fasteners for assembly .
• Always refer to the manufacturer's submittal or technical drawings for proper bend radius and installation guidelines. By following these steps, you can achieve a precise and safe 45-degree cable tray bend, ensuring smooth cable routing and structural integrity.