How to install corrugated pipes for mesh cable trays

Install corrugated pipes as protective conduits for mesh cable trays by preparing the trench, bedding the pipe, securing the pipe, and then mounting the mesh tray above it.

Step 1: Planning and Preparation

• Review project drawings to determine the cable tray route, pipe diameter, and support locations for both the corrugated pipe and mesh tray .
• Ensure coordination with other services (HVAC, plumbing, fire systems) to avoid clashes .
• Gather required materials: corrugated pipes, granular bedding material, flowable fill, pipe supports, mesh cable trays, clamps, and safety equipment .

Step 2: Trench and Bedding Preparation

• Excavate a trench along the planned route, ensuring it is free of rocks, debris, and frozen lumps .
• Lay a well-graded granular bedding or flowable fill to a depth of about 1 foot above the pipe .
• Compact the bedding to 90% standard density to prevent settling .

Step 3: Corrugated Pipe Installation

• Lift pipes carefully using slings; avoid dragging or dropping to prevent damage .
• Place the corrugated pipes in the trench, ensuring proper alignment and slope for drainage if required .
• Connect pipe sections securely, following manufacturer guidelines for jointing and sealing .
• Backfill around the pipe with granular material, compacting in layers to avoid voids .

Step 4: Mesh Cable Tray Installation

• Install supports or hangers above the corrugated pipe at intervals specified in the project drawings .
• Maintain a minimum vertical clearance (typically 30 cm) between the pipe and the mesh tray to prevent interference .
• Place the mesh cable tray on the supports and secure it with clamps or fasteners .
• Ensure the tray is level and continuous along the route, with proper expansion allowances if required.

Step 5: Final Checks and Safety

• Inspect the installation for alignment, secure connections, and clearance .
• Verify that all HSE requirements are met, including PPE usage and safe handling of sharp pipe edges .
• Document the installation and ensure it complies with project specifications and standards . By following these steps, corrugated pipes can effectively serve as protective conduits for mesh cable trays, ensuring both mechanical protection and safe cable management.