Chatsworth Products offers 3" Channel Rack-To-Runway Mounting Plate. It secures cable runway to the top of standard and universal equipment racks. The plate mounts either parallel or perpendicular. For proper attachment of 6" runway to 3" rack channel, the use of a top bar rather than a top angle is required. The plate comes with 4 each 5/16-18 x 2 1/4" J-bolts, 4 each 5/16-18 hex nuts, 4 each 5/16 split lock washers.