Cable tray support and hanger material standards

Cable tray hangers must be made from materials that provide sufficient mechanical strength, corrosion resistance, and compatibility with the cable tray system, typically steel, stainless steel, aluminum, or FRP depending on the environment.

Material Selection

Steel: Mild steel is commonly used for cable tray hangers due to its high strength and cost-effectiveness. It is often galvanized (hot-dip or pre-galvanized) to improve corrosion resistance, especially in indoor or mildly corrosive environments . Steel hangers are suitable for heavy cable loads and industrial applications. Stainless Steel: For highly corrosive environments, such as chemical plants or outdoor installations exposed to moisture, stainless steel (AISI 316L or similar) is preferred. Its high chromium content forms a protective oxide layer, providing excellent resistance to corrosion, pitting, and stress cracking . Aluminum: Aluminum hangers are lightweight, corrosion-resistant, and suitable for environments where weight reduction is important. Aluminum naturally forms a protective oxide layer, making it ideal for atmospheric exposure and non-extreme industrial conditions . FRP (Fiber-Reinforced Plastic): FRP hangers are used in environments with high chemical exposure or where electrical insulation is required. They offer good corrosion resistance and a high strength-to-weight ratio, though they are less common than metal hangers .

Environmental Considerations

• Indoor, dry environments: Mild steel with protective coating is generally sufficient.
• Outdoor or humid environments: Stainless steel or aluminum is recommended to prevent corrosion.
• Chemical or highly corrosive environments: FRP or stainless steel hangers are preferred.
• Load-bearing requirements: Material must support the weight of the cable tray and cables, including dynamic loads during installation or maintenance .

Standards and Compliance

Cable tray hangers should comply with DIN EN 61537 or equivalent standards, ensuring mechanical strength, durability, and compatibility with the cable tray system . Proper selection of material and finish is critical to maintain long-term reliability and safety.

Summary

When selecting cable tray hanger materials, consider mechanical load, environmental conditions, corrosion resistance, and system compatibility. Steel (galvanized), stainless steel, aluminum, and FRP are the primary options, with the choice guided by the installation environment and required durability . Proper material selection ensures safe, compliant, and long-lasting cable tray installations.