Abstract: A silo for storing viscous material such as sludge, the silo comprising a floor and a perimeter wall connected to the floor, is disclosed. The silo further comprises a moveable frame adjacent to the floor wherein the frame defines an area less than the area of the floor, and an opening in the floor. A crosspiece having opposite ends mounted to generally opposing portions of the perimeter wall is provided within the silo adjacent to the moveable frame. The crosspiece contains a surface facing the floor and is positioned adjacent to the frame. The crosspiece further comprises one or more diverter portions connected to the crosspiece which extend from the floor facing surface of the crosspiece towards the floor.