Minimum thickness of angle steel for cable tray supports

The minimum recommended thickness for angle steel used in cable tray supports is typically 1. 6 mm for light to medium loads, with thicker sections required for heavier loads or industrial environments.

Standard Guidelines

For general cable tray installations, mild steel (MS) angle supports with a thickness of 1. 6 mm are commonly used for supporting standard electrical and control cables. This thickness provides sufficient structural integrity for typical spans and load conditions in commercial or light industrial settings.

Factors Affecting Thickness SelectionLoad-Bearing Requirements: Heavier cable trays or densely loaded systems require thicker angle steel to prevent bending or deformation. For industrial environments with high mechanical stress, thicknesses of 2 mm or more may be necessary. Span Length: Longer spans between supports increase bending moments.

Reducing span length or increasing angle steel thickness improves stability. Environmental Conditions: Corrosive or outdoor environments may require galvanized or stainless steel with adequate thickness to maintain durability over time. Compliance with Standards: Cable tray supports should comply with BS EN 61537 or equivalent standards, ensuring that the chosen angle steel thickness can safely support the intended cable load and any additional imposed loads such as wind, ice, or maintenance personnel.

Practical RecommendationsLight-duty installations (small cable trays, short spans): 1. 6 mm MS angle steel is sufficient. Medium-duty installations (moderate cable loads, longer spans): 2 mm MS or galvanized angle steel.

Heavy-duty or industrial installations (large cable trays, high vibration, or mechanical stress): 2. 5–3 mm or higher, depending on load calculations and span length. Ensure all fasteners, bolts, and nuts are compatible with the angle steel thickness to maintain structural integrity.

M8 high-tensile bolts are commonly used for 1. 6 mm to 2 mm supports.

Conclusion

While 1. 6 mm is the minimum thickness for standard cable tray supports, the final selection should consider load, span, environment, and compliance with relevant standards. For industrial or heavy-duty applications, thicker angle steel is recommended to ensure long-term stability and safety.