Salt, spray, UV, and temperature cycling are a brutal mix for metalwork. In coastal plants, ports, and offshore platforms, the wrong cable tray choice will corrode, shed zinc, and fail prematurely. The right choice lasts decades with minimal intervention. Here’s how to engineer trays that survive.
Material Choices That Matter
Hot‑dip galvanised steel is a robust default for many outdoor sites, but persistent salt exposure can consume the zinc layer. Stainless steel (316) offers superior resistance in marine atmospheres. Aluminium is light and corrosion resistant, but watch galvanic pairing. FRP (fibreglass) excels where chemicals and salt combine, with zero rust risk.
Design for Drainage and Access
Trays should shed water, not trap it. Use perforations, slope runs slightly, and avoid debris pockets. Specify UV‑stable covers and clips; choose fixings in compatible alloys to prevent galvanic corrosion. Plan clear access for washing and inspection.
Maintenance Strategy
Adopt a rinse schedule, especially after storms. Inspect supports, clamps, and earthing jumpers. Touch up coatings early rather than replacing sections later. Keep a register of exposed locations and rotate spares into service proactively.
Procurement Tips
- Request salt‑spray test data and coating thickness certificates.
- Standardise on fasteners that match tray alloy to avoid galvanic issues.
- Stock corrosion‑proof drop‑outs, covers, and splice plates for rapid repairs.
Ned‑Tech supplies stainless, aluminium, and FRP systems with compatible fittings, plus guidance on mixed‑metal interfaces that often get overlooked.
Need a bill of materials or sizing help? Contact Ned‑Tech Cable Tray Ltd for design assistance and fast delivery.