Let's assume the following specifications for a galvanized steel channel tray: Using the formula: Weight per meter (Wm)= (100+50)×1. Export results instantly for schedules, submittals, and field checks. Ladder tray is a practical approximation. More adaptable and easier to maintain than conduit pipe, ideal for evolving wiring needs. Aluminum tray is extruded heat treated 6063-T5 (minimum tensile strength 30,000 psi). This is because the load capacity of the cable tray needs to be enough to support the cables, wires, and other items in its system.