Abstract: A tipping grid assembly includes a frame in which a tipping grid is supported and a scraper disposed above and reciprocatingly movable with respect to the tipping grid. The scraper includes a bridge having top and bottom chords, and teeth on the bottom chord over the tipping grid. A pair of running rails are attached to the frame to support a pair of posts which in turn support the top chord of the bridge. A pair of chains pull the bridge over the tipping grid to remove clogged material.