How to assemble a right-angle bend in a cable tray

A right-angle bend in a cable tray can be installed by either using a pre-manufactured 90° fitting or fabricating one from straight tray sections, following careful measurement, cutting, bending, and securing steps.

Steps for Metal Cable Trays

1. Measure and Mark: Determine the location of the 90° turn and mark the centerline on the tray where the bend will occur .

2. Prepare the Tray: Remove the tray lip along the bend area using a hand grinder or file, taking care to maintain safety equipment .

3. Cut and Relieve: Cut along the centerline and, if necessary, make relief cuts to prevent the tray from opening or deforming .

4. Bend the Tray: Use a blunt object or bending tool to gradually form the tray to a 90° angle. For wire mesh trays, a bolt cutter can be used to create bends live on-site .

5. Reinforce with Gussets: Measure the internal edges and fabricate a gusset from tray material to bolt onto the bend, ensuring structural integrity .

6. Secure the Bend: Use bolts and splice plates to fasten the bent section to the straight tray lengths. Ensure smooth heads face inward to avoid cable damage .

Steps for PVC Cable Trays

1. Measure and Mark: Confirm tray width, thickness, and mark the centerline for the bend .

2. Cut Relief Slots: For flexible PVC trays, cut short relief slots along the inner flange to allow compression without cracking .

3. Form the Bend: Slowly bend the tray along the marked line. For cleaner joints, miter the ends at 45° and bond or fasten them to form a 90° corner .

4. Secure and Support: Clamp the bend in place and attach to the support structure using appropriate brackets or hold-down units .

Safety and Best Practices

• Always wear safety glasses, gloves, and protective clothing when cutting or bending metal or PVC trays .
• Ensure bends are smooth and free of sharp edges to prevent cable damage .
• Use gussets or splice plates to maintain structural strength at the bend .
• For wire mesh trays, rubber caps can protect cut ends and maintain safety .

By following these steps, you can successfully install a right-angle bend in both metal and PVC cable trays, ensuring proper cable routing and structural integrity.