For factory buildings, cable tray thickness typically ranges from 1.2 mm for light-duty applications to 3 mm or more for heavy-duty industrial installations.

Typical Thickness Guidelines

• Light-duty trays: 1.2–1.6 mm, suitable for LAN, control, or instrumentation cables in commercial or low-load areas .
• Medium-duty trays: 2.0–2.5 mm, used for moderate cable loads or longer spans where additional rigidity is required .
• Heavy-duty trays: 2.5–3.0 mm or higher, designed for industrial power distribution, multiple layers of power cables, or environments with mechanical stress .

Material and Environmental Considerations

• Stainless steel trays: Often 2.0 mm or thicker for chemical, marine, or corrosive environments to ensure durability and resistance .
• Galvanized steel trays: Thickness may vary depending on galvanization type (electro-galvanized or hot-dip) to provide corrosion protection .
• Aluminum trays: Selected for strength-to-weight ratio and corrosion resistance; thickness depends on load and span requirements .

Span and Load Factors

• Longer spans (2.5–3 meters) require thicker trays to prevent sagging .
• Trays should be filled to 40–50% of their width to allow ventilation and future expansion .

Standards and Compliance

• National and international standards such as NEMA (USA) and IS (India) provide guidelines for tray thickness based on load categories: light, medium, and heavy duty .
• Compliance with these standards ensures safety, structural integrity, and long-term reliability in industrial installations .

Summary

For factory buildings, the choice of cable tray thickness depends on the type of cables, load, span, and environmental conditions. Light-duty trays start at 1.2 mm, medium-duty at 2.0 mm, and heavy-duty trays for industrial power systems are typically 2.5–3 mm or more. Material selection and protective coatings further influence the required thickness to ensure durability and compliance with safety standards .