Assume a steel ladder tray with the following specifications: First, calculate the volume: Volume (V)=200×100×2×3000 mm3 = 120,000,000 mm3 Converting to cubic meters: 120,000,000 mm3 = 0. 12 m3 Then, calculate the weight: Weight=7. 942t (or 942 kg)The general formula for calculating the weight of a ladder tray is: Weight of ladder tray=Material Density×Volume Where: Material Density is the inherent property of the tray material (e. Estimate cable tray self weight quickly for planning and procurement accurately. Export results instantly for schedules, submittals, and field checks. The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned in this technical guide only apply to our own cable management ranges and cannot under any circumstances be transposed to si osure, overheating or. Values are applicable to all resin systems, where possible. Large diameter more rigid cable i. telephone/control cables – use ladder tray. Rung spacing 150 mm (6"), 225 mm (9"), and 300 mm (12"). Given in kilograms per lineal meter. An average load is 75 kg/m (165 lbs/ft). 150 mm (6"), 203 mm (8"), 300 mm (12"), 450 mm (18"), 600 mm (24"), 750 mm (30"). The fiberglass ladder-type cable tray system shall be manufactured - pultrusion, compression molded, resin transfer molded and/or fabricated by Enduro Composites, Inc., located at 16602 Central Green Blvd., Houston, TX 77032; Tel: 713-358-4000, 800-231-7271; Email: sales@endurocomposites.