To produce cable trays, manufacturers must carefully select materials, design for load capacity and stability, and implement cutting and assembly processes that ensure precision. Surface treatments, such as galvanization and powder coating, further protect the trays from. en completely installed, without damage either to conductors or structural system use maintain spacing or to keep cables in place when the tray is ect the minimum bend ra-dius for cables as they exit the bottom of the cable tray. A rung spacing of 6 to 9 inches (150 to 230 mm) is preferable when. Cable tray manufacturing involves creating trays that are designed to hold, support, and protect electrical cables in various environments. Understanding the. Hubbell Take Off Support provides the contractor, engineer, end user a completed BOM, including all related products, counts, symbol legends and information required to price a project. Don't spend the many hours required to do counts and create BOMs for projects, rely on Hubbell's take off. us-trations without notice. 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. number of basic decisions must be made before a cable tray system can be specified. UNIVERSAL has developed a simple seven-step process to guide you in the process: Each step is described in detail below.