Dock Barricades - Loading Dock Barrier are designed for cross traffic to assist in preventing accidents. The barricade acts as a visual aid in dock-area safety by helping to prevent forklifts from being accidentally driven off the dock edge. The unit is installed quickly by anchoring it to the floor. The electric unit is simply plugged into the building electrical outlet. These units are designed to stop a 4,000-lb. fork truck at 4 mph.