Weight of ladder-type cable tray

The weight of ladder-type cable trays typically ranges from 15 kg/m to 75 kg/m depending on material, width, and rung spacing.Typical Weight RangesFiberglass Ladder Trays: Pultruded or molded fiberglass trays generally weigh between 15–30 kg per meter, depending on tray depth and resin-to-glass ratio (45–65% glass content for pultruded components) and rung spacing of 235 mm (9.25”) or similar .Aluminum Ladder Trays: Lightweight aluminum trays weigh approximately 15–45 kg per meter, with rung spacing options of 150 mm (6”), 225 mm (9”), and 300 mm (12”) affecting the overall weight .Steel Ladder Trays: Heavier steel trays, often I-beam style, can weigh up to 75 kg per meter, especially for wider trays or those designed for high cable loads .Factors Affecting Tray WeightMaterial: Fiberglass is lighter than steel but heavier than some aluminum alloys. Resin type and glass content influence the final weight .Tray Width and Depth: Wider trays with deeper rungs carry more weight and therefore are heavier per meter. Standard depths include 51 mm (2”), 76 mm (3”), 127 mm (5”), 178 mm (7”), and 229 mm (9”) for fiberglass trays .Rung Spacing: Closer rung spacing increases material usage and weight. Typical spacing ranges from 150 mm to 300 mm for aluminum and steel trays .Cable Load: The total weight per meter includes both the tray and the installed cables. Average cable loads can add up to 75 kg/m for heavily loaded installations .Standards and ComplianceLadder trays are designed according to IEC 61537 and NEC/CSA standards, which specify safe working loads, maximum deflection, and span support requirements .Manufacturers provide Safe Working Load (SWL) tables or diagrams to ensure the tray can support both its own weight and the cable load over the intended span .Practical ConsiderationsWhen planning installation, always account for:Tray weight per meter plus cable weightMaximum span between supportsEnvironmental factors (UV exposure, chemical resistance for fiberglass)Future cable additions (typically 25% spare capacity recommended) By considering these factors, engineers can select the appropriate ladder-type cable tray that balances weight, strength, and installation efficiency.