Calculate cable tray fill ratio, weight loading, and derating factors for multi-standard compliance. This calculator features an interactive interface with advanced visualizations. Include Cover? Adds cover weight using same material density. Used to estimate joints/couplers. All illustrations, descriptions and technical information included in this document are provided as indications and can cable trays are equivalent. The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned. How to Calculate the Load Capacity of a Cable Tray? Determine the total weight of all cables: Add any additional loads (e. Compare the total load to the tray's specified load rating. A 50-foot tray containing 30 cables weighing 0.