How are cable trays made at bends

Cable trays are bent using specialized tools and techniques to create horizontal, vertical, and offset turns while preserving cable integrity and structural strength.

Types of Bends

Cable trays can be bent in several ways depending on the tray type and installation requirements:

• Horizontal 90° bends: Used to turn the tray left or right along the same plane.
• Vertical bends (up/down): Allow the tray to transition between different levels.
• Tees and crosses: Enable branching or multi-directional routing.
• Offset bends: Shift the tray sideways to avoid obstacles .

Wire Mesh Cable Trays

Wire mesh trays are highly flexible and can be bent directly on-site without pre-fabricated fittings. The process involves:

1. Marking the bend area with a measuring tape and marker.
2. Cutting selected wires using a bolt cutter or cable cutter while leaving enough structural support.
3. Bending the tray carefully by hand or with pliers to achieve the desired angle.
4. Protecting cut ends with rubber caps or ensuring the zinc coating remains intact to prevent corrosion . This method is cost-effective and allows for quick adjustments during installation.

Ladder and Perforated Cable Trays

For ladder or perforated trays, bends are usually made in a fabrication shop or on-site using mechanical tools:

• Press brakes or bending machines are used to form precise angles without damaging the tray.
• Manual bending can be done for smaller trays using clamps and leverage bars, ensuring the bend radius meets cable specifications to avoid stress on the cables .
• Pre-fabricated fittings like elbows, tees, and risers are often used for complex or heavy-duty installations to maintain structural integrity and simplify assembly .

Key Considerations

• Maintain minimum bend radius to prevent cable damage.
• Avoid sharp edges that could cut or abrade cables.
• Ensure structural support at the bend to handle cable weight.
• Use protective coatings or caps on cut ends to prevent corrosion . By following these techniques, installers can create professional, safe, and durable cable tray bends suitable for industrial, commercial, or residential applications.