Abstract: A bulk material storage bin and a floor structure for such a bin for storing grain or like bulk commodities. The floor structure of the bin has downwardly converging side walls preferrably having a smooth surface. In a preferred embodiment, the floor structure is conical in shape with a downwardly directed apex. As bulk material is emptied from the storage bin, it travels down the side walls of the floor to the apex where it is conveyed outwardly. Piles of residual bulk material are not accumulated along the floor structure.