A type of cable tray that consists of two parallel channels connected by rungs, similar in appearance to the common straight ladder. 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 the cable tray cont d for instrumentation and control applications that require. 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. Separates different classes of cables (e., power, data, fiber) within the same tray to prevent electromagnetic interference (EMI). The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned. Equal tees, unequal tees and crossovers are available for light, medium and heavy duty cable tray systems with widths ranging from 50mm – 900mm.