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. 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. Hubbell's NEXTFRAME® Ladder Tray is the effective and widely used cable runway that supports and delivers bundles of cable between cabinets, racks, and closets, along walls, and suspended from ceilings. The Ladder Tray features light, rugged, tubular steel construction. It is designed for. 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 industrial applications. All fittings are available in sizes and types corresponding to the straight cable tray sections. These fitting are including: elbow, horizontal cross, vertical inside riser, reducers, cover clip, joint connector, horizontal cable tray tee, horizo. Cable tray spacing is a critical aspect of electrical infrastructure, influencing both safety and efficiency.