The weight per meter of a tray-type cable tray depends on the material, tray type, and dimensions, typically ranging from 5–25 kg/m for standard steel or aluminum trays.

Factors Affecting Tray Weight

1. Material:
   • Mild/galvanized steel: ~7850 kg/m³
   • Stainless steel (SS304/SS316): ~7930–8000 kg/m³
   • Aluminum alloy: ~2700 kg/m³
   • FRP (fiber-reinforced plastic): ~1800–2000 kg/m³
2. Tray Type:
   • Solid-bottom trays: Heavier due to full metal coverage.
   • Perforated trays: 15–30% lighter than solid trays because material is removed for ventilation while maintaining structural strength .
   • Ladder trays: Weight depends on rung spacing (typically 200–300 mm) and rail dimensions; generally lighter than solid trays but heavier than perforated trays of similar width .
3. Dimensions:
   • Width and side rail height: Larger trays require more material, increasing weight.
   • Sheet thickness: Small increases in thickness (e.g., 1.6 mm to 2.0 mm) can increase weight by ~25% for the same profile .
   • Covers and flanges: Adding covers or flanges increases total weight by 1–4% depending on coating and material .

Typical Weight Ranges

These values are typical manufacturer estimates; actual weight may vary depending on rung spacing, perforation pattern, welding method, and coating .

Calculation Method

The weight per meter can be calculated using: Weight (kg/m) = Material Density × Tray Volume per Meter Where tray volume is determined by the cross-sectional area of the tray (bottom + side rails + rungs) multiplied by 1 meter of length. For perforated trays, reduce the volume by 15–30% to account for openings .

Practical Considerations

• Always verify with manufacturer datasheets for exact weights.
• Include coating weight (e.g., hot-dip galvanizing adds ~0.8–1.5 kg/m²).
• Consider support spacing and dynamic loads; heavier trays require closer support intervals.
• For planning, separate tray self-weight from cable fill weight to ensure structural safety . By using these guidelines, engineers and installers can accurately estimate the weight per meter for tray-type cable trays and plan supports, brackets, and installation logistics accordingly.