Standard thicknesses include 1. 5 millimeters, and 2 millimeters. The choice of thickness should reflect the weight of the cables and the environmental conditions where the tray will be installed. 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 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. ies aluminum alloys (Aluminum Association designation) to manufacture cable tray. The alloys are selected for their mechanical properties, such as strength and hardness, as well as for their resis ance to corrosion, particularly stress corrosion, cracking, and pitting co anufactured using a. However, selecting the correct thickness and width of a cable tray is essential to maximize performance, avoid safety hazards, and minimize costs. This article explains the key considerations to help you make the right choice. Here in the UK, standard widths run from a slim 50mm for a handful of data runs right up to 900mm or more for the heavy-duty. SS304, and SS316.