Cable tray manufacturing at 45 degrees

A 45-degree cable tray bend can be fabricated by marking, cutting, and bending the tray using standard formulas or by using pre-fabricated 45-degree fittings.

Methods for Fabricating a 45-Degree Bend

1. Using Pre-Fabricated Fittings: Medium-duty cable trays are available with 45-degree flat bends that include built-in couplers, allowing for quick and precise angular changes in the same plane without manual cutting or bending . These fittings are ideal for maintaining structural integrity and ensuring compliance with installation standards. 2. Manual Fabrication: For custom bends, the process involves:

• Marking the tray: Identify the centerline of the tray and determine the cut lines on either side. For a 45-degree bend, halve the angle to 22.5 degrees on each side to calculate the lip removal distance. For example, in a 100 mm tray, this results in approximately 41.42 mm on each side .
• Cutting and filing: Cut along the centerline and remove the marked lip sections. File edges to ensure smooth overlap.
• Bending: Fold the tray so the cuts overlap, forming the 45-degree angle. It is recommended to practice with cardboard first to verify measurements before working on the actual tray .

Standards and Considerations

• Cable trays and fittings should comply with NEMA VE 1-3.02 standards, ensuring proper load-bearing capacity and material quality .
• Ensure that bends do not compromise cable fill capacity or create sharp edges that could damage cables.
• Support spacing and alignment should follow NEMA guidelines to maintain structural stability.

Tips for Successful Fabrication

• Always measure twice and cut once to avoid material waste.
• Use appropriate tools such as metal shears, files, and bending jigs for accuracy.
• Consider pre-fabricated bends for complex or high-volume installations to save time and ensure consistency.
• Verify the bend angle with a protractor or angle gauge before final installation. By following these methods, a 45-degree cable tray bend can be fabricated safely and efficiently, either manually or using pre-fabricated fittings, while maintaining compliance with industry standards .