How to make a parallel bend in a cable tray

Parallel bends in cable trays are achieved by carefully marking, cutting, and bending the tray to maintain cable spacing and proper bend radius, using either manual tools or bending machines.

Understanding Parallel Bends

A parallel bend allows a cable tray to change direction while keeping the tray runs parallel to each other, often used to navigate around obstacles or align with equipment. Maintaining the minimum bend radius is critical to prevent cable damage and ensure smooth cable installation .

Techniques for Ladder and Wire Mesh Trays

1. Ladder Cable Trays

• Mark the bend area clearly using a measuring tape and marker.
• Use a bending machine or manual crimping tools to create the bend. For small adjustments, a metal bar can be used to lift and shape the tray gradually .
• Ensure the rungs remain evenly spaced (typically 6–9 inches) to support cables and maintain structural integrity .
• Avoid sharp bends that could compromise the tray or cables. 2. Wire Mesh Cable Trays
• Horizontal 90° bends: Used to turn the tray left or right.
• Vertical bends: Used to move the tray up or down between levels.
• Tee and cross bends: For branching or multi-direction routing.
• Offset bends: To avoid obstacles while keeping runs parallel.
• Tools required include bolt cutters, pliers, measuring tape, and safety gloves. Mark the bend area, cut selectively if needed, and bend gradually to maintain smooth curves .

Best Practices

• Always support the tray at the bend area to prevent deformation.
• Maintain the minimum bend radius for the type of cables being installed.
• Avoid leaving sharp edges that could damage cables.
• For complex installations, consider pre-fabricated bends or bending machines to ensure precision .
• Inspect bends after fabrication to ensure alignment and structural integrity before cable installation .

Safety Considerations

• Wear hand gloves and eye protection when cutting or bending trays.
• Ensure the work area is clear of obstacles and personnel.
• Follow installation standards and manufacturer guidelines for material handling and bending limits . By following these techniques, parallel bends in cable trays can be executed efficiently, maintaining both structural integrity and cable safety, while allowing flexible routing in industrial or commercial installations.