This short shows key steps: cutting sheet metal to size, punching or slotting for wire access, bending edges to form the tray shape, welding joints for strength, and smoothing edges for safety. An assembly of units/sections with associated fittings that form a rigid structural system to securely fasten or support cables. Think of a roadway bridge that supports traffic. more. B manufactures its cable tray in a range of materials with a variety of finishes. 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 cut Oglaend System Support Channels, Cable Ladders and Cable Trays. Oglaend System manufacture and deliver Multidiscipline modular bolted support systems, cable trays, cable ladders and accessories for complete installation and containment of Instrument, Electrical, Telecom, HVAC and Piping. We recognize the need for a complete cable tray reference source for electrical engineers and designers. The information has been organized for.