Stainless Steel Cable Tray Thickness Selection

The minimum thickness for stainless steel cable trays is typically 2.5 mm for general trays, with support brackets and channel sections requiring 5 mm or more, depending on design and load requirements.

Material and Standards

Stainless steel cable trays are commonly made from AISI/BS EN 10088-2 Grade 1.4401 (ASTM 316) or SS304/SS316, providing excellent corrosion resistance and mechanical strength for industrial and outdoor applications . Hardware, bolts, and mounting channels are also specified in the same stainless steel grade to ensure uniform durability .

Minimum Thickness Guidelines

• General cable tray sections: Minimum thickness is 2.5 mm, suitable for standard straight trays and cantilever arms .
• Channel angle support brackets: Minimum thickness is 5 mm, typically for M12 bolt holes and structural support .
• Rungs and side rails in ladder-type trays: Fabricated from SS304 or SS316, welded to side rails, with thickness designed to meet NEMA VE 2 load requirements, ensuring each rung can support a 200 lb concentrated load with a safety factor of 1.5 .

Tray Dimensions and Load Considerations

Cable trays are supplied in standard lengths of 2–3 meters for straight sections, with widths ranging from 6 to 36 inches or as specified in project drawings . The thickness of the tray may vary depending on the tray type (ladder, perforated, or solid-bottom), environmental conditions, and expected load. For example, trays in corrosive or outdoor environments may require thicker stainless steel to maintain structural integrity over time .

Summary

When selecting stainless steel cable trays, the minimum thickness is 2.5 mm for general trays, while structural supports and brackets require 5 mm or more. Compliance with BS EN 10088-2, ASTM 316, and NEMA VE 2 ensures durability, corrosion resistance, and load-bearing capacity suitable for industrial and commercial installations .