Alternatively, a standard formula is to measure 45mm to 82mm (depending on tray size) on either side for the cuts. Cut the Side Channels: Cut the flanges (sides) of the tray at a 45-degree angle, stopping at the base of the tray. The 90° Vertical Elbow provides essential support and enables seamless cable management throughout your cable routing system. Class 1: Designed for use with NEMA Classes 12B and 12C cable trays. These systems have 1 1/8" wide side. rung spacing aintained th Flange - (2=13/16", 4=1-1/4") Load Depth - (3", 4 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. A structural offset in the sidewall creates strong, mid-span splices. UNITRAY LADDER TRAY is a structure consisting of two longitudinal side members connected by individual transverse members (rungs). Rungs are welded to the side members by either cold metal transfer (CMT/GMAW) or gas tungsten arc welding (TIG/GTAW). Both processes have their inherent advantages and. us-trations without notice. The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned.