Under the action of safe working load (SWL), the actual mid-span deviation of each span should not exceed 1/100 of the span; the actual lateral deviation of each span should not exceed 1/20 of the bridge width. All illustrations, descriptions and technical information included in this document are provided as indications and can cable trays are equivalent. Whether you're designing a new. , is a welded wire-mesh cable management system made of high-strength steel wire. It is used to manage cables for light B manufactures its cable tray in a range of materials with a variety of finishes. The selection of material and finish is a function of the environment in wh tant in a wide range. OBO BETTERMANN has offered prod-ucts and solutions for electrical instal-lation for over 100 years.