Thickness of cable trays in factory buildings

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 GuidelinesLight-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.