Metal Mesh Cable Tray Construction Method

Constructing a metal mesh cable tray involves careful planning, proper support installation, and secure cable routing to ensure safety, ventilation, and load capacity.

1. Planning and Preparation

Begin by reviewing approved shop drawings to determine the tray layout, lengths, and locations within the building or facility . Inspect all materials upon delivery to ensure they match specifications and are free from damage. Store trays horizontally on a flat surface with timber supports at intervals of about one meter, protecting them from moisture and sunlight . Gather necessary tools such as drills, wrenches, measuring tape, levels, and cutting tools, along with PPE including gloves, safety glasses, and hard hats .

2. Marking and Layout

Determine the cable tray route and mark it on walls or ceilings using a chalk line or laser level . Identify support points at standard intervals, typically every 1.5 meters, and mark locations for bends, tees, or risers . Ensure the pathway is clear of obstructions like pipes or HVAC ducts.

3. Installing Supports

Mesh cable trays can be mounted using wall brackets (cantilever) or ceiling suspension systems . Install brackets or threaded rods at the marked support points, ensuring they are level and securely anchored. Supports must be capable of handling the tray's weight plus the maximum cable load.

4. Assembling the Mesh Tray

Position the mesh trays on the installed supports. Use splice plates or couplers to join tray sections, ensuring alignment and stability . The mesh design allows for easy creation of bends, branches, and exits by bending or cutting the wires as needed . Ensure that the tray maintains proper ventilation and load distribution.

5. Securing and Grounding

Fasten the trays to the supports using bolts or clamps, and check that all connections are tight. Install grounding straps to maintain electrical safety and prevent potential hazards . Verify that the tray system maintains the minimum bend radius for cables and that rungs are spaced appropriately (typically 150–230 mm) to support cable weight .

6. Cable Installation

Feed cables into the mesh tray, ensuring they are evenly distributed and do not exceed the recommended fill ratio (usually 50%) to prevent overheating . Use cable ties or clamps to secure cables where necessary, especially at bends or junctions.

7. Inspection and Final Checks

After installation, inspect the entire system for alignment, secure connections, and proper grounding. Ensure that all bends, branches, and risers are correctly installed and that the tray is free from sharp edges that could damage cables . Perform a final check against the shop drawings to confirm compliance with design specifications. By following these steps, a metal mesh cable tray system can be safely and efficiently installed, providing strong support, excellent ventilation, and flexibility for future cable additions or modifications .