Grizzly fixed at one end only, the discharge end being overhung and free to vibrate. This vibration of the bar is caused by the impact of the material. The disadvantage of the ordinary bar grizzly is clogging due to the retarding effect of the cross rods. This has been overcome in the cantilever grizzly by eliminating the tie rods except at the head end, where they are essential. The absence of these rods below the point of support also aids in preventing clogging because it permits the bars to vibrate in a horizontal plane, which keeps the material from wedging.