Installation of cable trays with rivets

Cable trays can be securely installed using rivets by following proper support spacing, alignment, and load management practices to ensure structural integrity and code compliance.

Selecting the Cable Tray and Rivets

Choose the appropriate type of cable tray (ladder, ventilated trough, or solid-bottom) based on cable type, load, and environmental conditions. Rivets should be suitable for the tray material (aluminum, steel, or FRP) and provide sufficient shear strength to support the tray and cable load. Stainless steel or aluminum rivets are commonly used for corrosion resistance in industrial or outdoor environments.

Preparing the Installation

Inspect the pathway for obstructions such as pipes or HVAC ducts and ensure the surface is level. Mark support points using a laser level or chalk line. Standard support spacing is typically 1.

5 to 2 meters, but check manufacturer specifications for maximum load. Determine bends and risers in the tray route and plan splice plate locations to avoid mid-gap placement, ideally installing splice plates at ¼ of the gap between supports.

Installing Supports

Supports can be wall-mounted brackets, ceiling struts, or center-hung hangers. Ensure each support can handle the maximum load of the tray and cables. For center-hung trays, the maximum support spacing can reach 3.

6 meters, depending on tray type and load. Fastening with RivetsAlign tray sections and drill holes for rivets according to the tray manufacturer's specifications. Insert rivets through the tray and support or splice plate, ensuring a snug fit.

Use a rivet gun to secure the rivets, making sure each connection is tight and flush to prevent tray movement. Check alignment along the entire run to maintain a level and straight installation.

Electrical and Safety Considerations

Maintain electrical continuity every 18 meters or as required by code. Ensure grounding and bonding of metallic trays to prevent electrical hazards. Avoid using cable trays as walkways to prevent injury or damage.

Leave at least 300 mm clearance above or between trays for cable installation and maintenance.

Final Checks

Verify that all rivets are properly seated and that the tray is level. Confirm that the tray can support the intended cable load without sagging. Ensure that bends and splice plates do not compromise the minimum bending radius of installed cables.

By following these steps, riveted cable tray installations can achieve structural stability, compliance with electrical codes, and safe cable management in commercial or industrial settings.