Cable ladder trays have side rails with rungs to route and support cable. The rungs allow cable to enter and exit anywhere along the span, and they facilitate future changes. Explore our full collection of Metallic Ladder 3D Drawings, including horizontal fittings, vertical fittings and metallic tray. Filter Results Results refresh instantly as you filter. The vertical cable ladders STL, STM and STIC meet the exact specifications and definitions of DIN 4102 Part 12 of November 1998, such as height of the cableladder / tray, width of the cable ladder/ tray, proportion of holes in the cable tray, distance between rungs of the cable ladder, material. us-trations without notice.