A carriage and loose grad run along a track supported by columns and a single unit can service multiple bar racks. The grab is constructed in such a way that the tines fall between the screen bars during lowering. As the grab descends, it effectively removes debris from in between the bars. When reaching the bottom of the bar screen, the grab will close hydraulically, after which the graab with the debris will be hoisted above the deck level to the upper position. The grab with debris runs along the track to the dump area. The overhead monorail design gives tremendous flexibility to site specific demands and allows the screen deck to remain clear and clean of equipment and debris. The system can be installed to be run manually or fully automatic.