International projects are most often made in widths of between 50mm and 900mm and depths of between 50mm and 150mm. In practice, cable tray dimensions are a system of interrelated measurements —width, depth, length, and material thickness—that directly affect cable fill compliance, heat dissipation, structural loading, and long-term expandability. The majority of the sections have a length of 3 meters, as this is easy to transport and can be compactly placed on the shipping trucks. The width required will be determined by the. Width: The width of a cable tray refers to the standard width of its unit, typically available in sizes such as 100mm, 200mm, 300mm, 400mm, 500mm, and 600mm. Widths of 100mm and 200mm are suitable for suspending and supporting smaller cables, while widths from 300mm to 600mm are suitable for larger. For International Standards, the manufacturer shall declare the tray system Safe Working Load (SWL) per the International Electrotechnical Commission (IEC) 61537 and publish in the form of a table or diagram. Learn about ladder, perforated, solid-bottom, wire mesh, and channel trays in this complete guide. Wire Mesh Cable Tray. B-Line Series Length 120 = 10 ft. Published load safety factor is 1. To obtain mid-span deflection.