How to hoist cable trays in a steel structure

Hoisting cable trays in a steel structure requires careful planning, proper lifting equipment, balanced load distribution, and secure attachment to the steel framework to ensure safety and structural integrity.

Preparation and Planning

Before lifting, determine the total weight of the cable tray and any installed cables to ensure the steel structure and lifting equipment can safely support the load. Check the manufacturer's rated capacity for the tray and plan the hoisting sequence to avoid overloading any single support. Ensure all personnel involved are trained in electrical and mechanical safety practices.

Lifting Equipment and Sling Placement

Use an overhead crane or hoist for lifting long or heavy tray sections. When attaching slings: Avoid using the tray itself as a lifting point; attach slings to the ends or designated lifting points to prevent crushing the siderails. Balance the load at the center to prevent tipping or swinging.

For long trays, consider using two lifting points spaced appropriately to reduce bending stress. Only lift single bundles per lift to maintain control and prevent accidents.

Hoisting Procedure

Position the crane or hoist directly above the tray to minimize lateral movement. Attach slings or lifting straps securely to the tray ends or lifting brackets. Lift slowly and steadily, keeping the tray level to avoid twisting or bending.

Guide the tray into position using tag lines if necessary to prevent contact with the steel structure or other equipment. Align the tray with the steel support frame and ensure it is properly seated on hangers, rods, or unistrut supports.

Securing the Tray

Use center-hung or side-hung supports according to the design, ensuring the maximum support spacing is not exceeded (typically 3. 6 m for standard trays),. Tighten all fasteners and verify that the tray is level and stable before releasing the hoist.

Confirm that the tray is not used as a walkway or ladder, as it is designed only to support cables.

Safety Considerations

Always wear personal protective equipment (PPE), including gloves, hard hats, and safety glasses. Ensure the area below the hoisting operation is clear of personnel. Inspect all lifting equipment and slings for damage or wear before use.

Follow local electrical and construction codes to maintain compliance. By following these steps, cable trays can be safely hoisted and installed in steel structures while minimizing the risk of damage to the tray, cables, or personnel.