Abstract: An apparatus, system, and method for unloading residual particulate matter such as grain from a storage enclosure such as a grain bin, silo, or building having at least one floor opening. In one embodiment, a corrugated metal overfloor is added spaced above the bin floor by a framework of generally horizontal beams and plural downwardly depending legs. The frame work supports the overflooring at a slight (e.g. 1 or 2 degrees) slope from the bin sidewall towards the floor opening. Vibration generators are distributed across the overflooring and can be operated to generate vibration in the overflooring to influence residual particulate towards the floor opening.

Abstract: An apparatus and method for unloading a grain or particulate matter large capacity storage bin. The apparatus includes a bin with a cylindrical side wall. A relatively large opening is provided in the side wall. A box frame is generally vertically installed to the inside of the bin and intersects the opening in the side of the bin. A plurality of inlets into the box frame are spaced apart along the inner most side of the box frame. The box frame defines a channel that intersects with the opening in the bin. The plurality of smaller openings control the flow of particulate matter into the channel to allow control but fast unloading of the bin by gravity.