Fabrication of left and right bends in cable trays

Left and right bends in cable trays can be fabricated on-site using cutting, bending, and rejoining techniques to create smooth directional changes for cable routing.

Tools and Materials Required

• Wire mesh trays: Bolt cutter, pliers, measuring tape, marker, hand gloves, rubber caps for cut ends
• Sheet metal trays: Galvanized sheet (1.6 mm or as per design), angle grinder or metal shear, drill machine, rivets or nuts & bolts, bending tools (manual or hydraulic press brake), welding machine (optional),

Steps for Wire Mesh Cable Tray Bends

1. Mark the Bend Area: Identify the location and angle of the bend (commonly 45° or 90°) and mark it clearly on the tray .
2. Cut the Tray: Use a bolt cutter to cut the wires at the bend area. The cut edges are protected by the zinc layer, and rubber caps can be applied for additional safety .
3. Form the Bend: Bend the tray manually or with pliers to achieve the desired angle. Wire mesh trays allow on-site bending without additional fittings .
4. Check Alignment: Ensure the bend is smooth and maintains proper cable support. Adjust as necessary before installation .

Steps for Sheet Metal Cable Tray Bends

1. Marking the Bend Angle: Draw the centerline and side walls of the tray, dividing the curve into equal segments for a smooth radius .
2. Cutting Side Walls: Cut triangular or rectangular sections on the side walls to allow folding without deforming the tray .
3. Forming the Bend: Use a press brake or manual bender to gradually bend each segment to form the curve .
4. Rejoining Side Walls: Reconnect the cut sections using welding or bolting/riveting with metal strips for reinforcement .
5. Drilling Connection Holes: Drill holes at each end of the bend for secure attachment to straight tray sections using nuts and bolts .

Safety and Best Practices

• Always wear hand gloves and safety gear when cutting or bending trays .
• Maintain the minimum bend radius to prevent cable damage and ensure smooth cable routing .
• For wire mesh trays, bends can be created directly on-site, reducing the need for pre-fabricated fittings .
• For sheet metal trays, ensure uniform bending to maintain structural integrity and proper cable support . By following these methods, both left and right bends can be fabricated efficiently, ensuring safe, neat, and professional cable tray installations.