A combine concave is provided, including a frame including a plurality of spaced, vertical frame members each having an upper end and an opposite lower end, a mount plate connecting the upper ends, and a mount clevis connecting the lower ends, a plurality of disruptor bars mounted to the frame in spaced, parallel orientation, a grating plate slidably positioned against a rear surface of each of the disruptor bars, the grating plate defining a plurality of spaced, parallel slots, the grating plate being movable relative to the disruptor bars between a first position, where the plate blocks spaces between the disruptor bars, and a second position, where the plate allows free passage of material through the disruptor bars.

A combine concave is provided, including a frame including a plurality of spaced, vertical frame members each having an upper end and an opposite lower end, a mount plate connecting the upper ends, and a mount clevis connecting the lower ends, a plurality of disruptor bars mounted to the frame in spaced, parallel orientation, a grating plate slidably positioned against a rear surface of each of the disruptor bars, the grating plate defining a plurality of spaced, parallel slots, the grating plate being movable relative to the disruptor bars between a first position, where the plate blocks spaces between the disruptor bars, and a second position, where the plate allows free passage of material through the disruptor bars.