Thickness of National Standard Cable Tray

The standard thickness of cable trays varies by material: steel 1.0 mm, aluminum 1.2 mm, and fiberglass 3.0 mm.Material-Specific Thickness StandardsSteel Cable Trays: For trays with a width of ≤150 mm, the standard plate thickness is 1.0 mm. Steel trays are commonly used for their strength and load-bearing capacity, and thickness directly affects the safe working load and deflection under load .Aluminum Alloy Cable Trays: The minimum thickness is 1.2 mm. Aluminum provides corrosion resistance and a favorable strength-to-weight ratio, making it suitable for environments where weight reduction and corrosion protection are important .Fiberglass (FRP) Cable Trays: The minimum thickness is 3.0 mm. Fiberglass trays are used in highly corrosive environments and provide excellent electrical insulation, but require greater thickness to achieve comparable mechanical strength .Protective Layer ThicknessCable trays also include protective layers such as zinc coatings or other finishes. The thickness of these layers varies depending on the galvanization or coating process and contributes to corrosion resistance and durability .Importance of ThicknessThe thicker the tray, the higher its load capacity and the lower its deflection under the same support span. This ensures safety and reduces bending deformation, which is critical for maintaining cable integrity and long-term reliability .SummaryWhen selecting a cable tray, it is essential to consider both the material and the standard thickness to meet national standards and ensure mechanical performance. Steel trays typically start at 1.0 mm, aluminum at 1.2 mm, and fiberglass at 3.0 mm, with additional protective coatings applied as required for environmental conditions .