Ladder-type cable trays typically weigh between 5 kg/m and 20 kg/m depending on material, width, and construction.

Typical Weight Ranges

• Steel Ladder Trays: Standard steel ladder trays generally weigh 8–20 kg per meter, depending on width (150 mm to 900 mm) and rung spacing (150 mm to 300 mm) .
• Aluminum Ladder Trays: Lighter than steel, aluminum trays usually weigh 5–12 kg per meter, with heights ranging from 90 mm to 203 mm .
• FRP/GRP Ladder Trays: Fiberglass-reinforced plastic trays are lightweight and corrosion-resistant, typically 4–10 kg per meter, depending on width and design .

Factors Affecting Weight

1. Tray Width and Height: Wider or taller trays require more material, increasing weight. For example, a 900 mm wide steel tray may weigh significantly more than a 150 mm tray, though load capacity is independent of width .
2. Material Density: Steel is heavier than aluminum or FRP, and hot-dip galvanizing can add 0.8–1.5 kg/m², increasing total tray weight by 2–4% .
3. Rung Spacing: Closer rung spacing increases material usage and weight. Common rung spacings are 150 mm, 225 mm, and 300 mm .
4. Perforation: Perforated trays reduce material volume by 15–30%, lowering weight compared to solid trays .

Load Considerations

• Ladder trays are designed to support cable loads of approximately 75 kg/m on average, with support spacing typically every 2–3 meters for steel and aluminum trays .
• FRP trays, being lighter, may require closer support spacing depending on the cable load .

Summary

When selecting a ladder-type cable tray, consider both the self-weight and the cable load to determine support spacing and structural requirements. Steel trays are heavier but robust, aluminum trays offer a balance of strength and lightness, and FRP trays are ideal for corrosion resistance and lightweight applications. Accurate weight estimation ensures safety, compliance, and cost-effective installation .