A cable tray and at least one side wall bracket secured to the cable tray is disclosed. The cable tray has a plurality of transverse and longitudinal wires. The side wall bracket has an upper loop with a first end and a second end. Curved portions extend from the first end and the second end of the upper loop. An angled leg extends from each curved portion. The angled legs are defined by a U-shaped inside leg portion and a hook that leads to an outside leg portion. The inside leg portion of each angled leg engages a first surface of side longitudinal wires and bottom longitudinal wires and the outside leg portion of each angled leg engages a second surface opposite the first surface of side longitudinal wires and bottom longitudinal wires to secure the side wall bracket to the cable tray.