Wall duct is used as the continuation for standard trench duct in the floor. Wall duct can be routed up the wall and across the ceiling or under the finished floor (in ceiling space below) to provide a continuous lay-in raceway system from control consoles and floor equipment to overhead apparatus. Devices are furnished complete with covers and are available for either flush or surface mounted installations. Standard construction is 14 gauge steel with ANSI 49 gray electrodeposition paint. Alternate construction is painted aluminum. This accessory is a sweep edgewise elbow with surface cover and is 10 inches wide. Partitions and tunnels are to be field modified and installed where required. NEMA Type 1 SQUARE-Duct® wireway is UL and CSA Listed.