Fittings can, on the one hand, be used for horizontal or vertical changing of the routing direction or, on the other, to change the height or width of the dimension. Practical examples for this are horizontal or vertical bends, T piec-es, cross-overs, reductions or also end. Is your cable tray system optimized for safety, dependability, space and cost savings? Cable tray (or cable ladder) systems are a popular alternative to electrical conduit systems, as they have an outstanding record for dependable service, design flexibility and cost savings in commercial and. This publication is intended as a practical guide for the proper and safe* installation of cable ladder systems, cable tray systems, channel support systems and associated supports. Cable ladder systems and cable tray systems shall be manufactured in accordance with BS EN 61537, channel support. 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. es in the industrial environment. Our cable support. I've linked two photos, the first one shows a ladder cable tray that has been placed on top of a mezzanine, with the middle elevation being 12'-6", but then I go and place another ladder cable tray like 3 feet directly above it but for some reason it tells me that its middle elevation is about. This paper examines the effect of elevation above sea level (EASL) on cable tray capacity calculations. As cable trays are increasingly used in high-rise buildings and urban areas, understanding the impact of EASL on cable capacity is crucial for ensuring reliable and efficient electrical.