Cable tray support and hanger weight conversion

The weight of cable tray supports and hangers depends on material, tray type, dimensions, and span, typically ranging from a few kilograms per meter for aluminum or light steel to over 20 kg/m for heavy-duty steel trays.

Factors Affecting Weight

Material: Cable trays and supports are commonly made from carbon steel, stainless steel, aluminum, or FRP. Carbon steel has a density around 7,850 kg/m³, stainless steel about 8,000 kg/m³, aluminum 2,700 kg/m³, and FRP 1,800–2,000 kg/m³. The choice of material significantly affects the weight of both the tray and its supporting elements.

Tray Type and Geometry: Ladder trays, perforated trays, and solid-bottom trays differ in weight. Ladder trays consist of two side rails and rungs, with rung spacing typically 200–300 mm, which contributes to the overall weight. Perforated trays reduce metal volume by 10–35% depending on the pattern, while solid trays are heavier.

Tray width, side height, and flange dimensions directly increase the developed width and thus the weight per meter. Thickness: Even small changes in metal thickness, for example from 1. 6 mm to 2.

0 mm, can increase the tray weight by approximately 25% for the same profile. Support Type: Supports include wall brackets, cantilever brackets, pendant hangers, and trapeze frames. Standard support constructions, such as RS 60 systems, use brackets and rods sized according to tray width and load.

Longer spans or heavier trays require more robust supports, which increases the total weight of the support system. Typical Weight RangesLight-duty aluminum trays with minimal supports: 3–6 kg/m for the tray itself, with supports adding 1–2 kg/m depending on spacing. Medium-duty steel ladder trays: 8–15 kg/m for the tray, with supports adding 2–5 kg/m.

Heavy-duty steel trays (wide or deep): 15–25+ kg/m for the tray, with supports and hangers adding 5–10 kg/m or more, especially for long spans or congested installations.

Design Considerations

Separate Tray and Cable Weight: Engineers often calculate tray self-weight separately from cable fill weight to ensure accurate load paths and structural checks. Support Spacing: The spacing of hangers or brackets affects both the load on each support and the total weight of the support system. Closer spacing reduces bending stress but increases the number of supports and total weight.

Environmental Factors: Supports must withstand mechanical loads, corrosion, and environmental conditions. Galvanized or stainless steel supports may weigh slightly more but provide better durability. In summary, the weight of cable tray supports and hangers is highly variable, depending on material, tray type, dimensions, thickness, and support configuration.

For precise planning, it is recommended to use manufacturer specifications or a cable tray weight calculator to determine the exact load per meter for both trays and their supports.