Unfortunately, it is not possible to generate a vertical Tee (see red arrow). Only to. Ensure your cable tray solution is designed for your application, with our vast range of ladder tray fittings. Choose from the following: Horizontal elbows, Vertical elbows, Tees, Reducers, Cross pieces, Branches Class 1 Tray Fittings are designed for use with NEMA Classes 12B and 12C Cable Trays. Feel free to get in touch with our customer service team Manufactured to complement the range of. Equal tees, unequal tees and crossovers are available for light, medium and heavy duty cable tray systems with widths ranging from 50mm – 900mm. Materials and finishes available are mild steel pre galvanised as standard with mild steel hot dip galvanised after manufacture and stainless steel grade. The latest evolution in cable tray fittings, the Helix™ fitting assembly was developed specifically for use in confined areas and allows installers to transition from horizontal to vertical surfaces in less time, using significantly less space. / All Rights Reserved The. The cable tray helix fittings from Thomas & Betts (T&B) ease transitions between horizontal and vertical cable tray runs, especially in confined areas and near walls.