A mobile multi-deck screening apparatus , comprising: a feeder configured to receive material for screening; a first screen deck configured to receive the material from the feeder; a first discharge conveyor configured to output an oversize fraction of the first screen deck ; a second screen deck configured to receive an undersize fraction of the first screen deck ; a second discharge conveyor configured to output an oversize fraction of the second screen deck ; the first discharge conveyor being pivotably mounted to operate in a direction selected between a first direction and a second direction, wherein the second direction differs from the first direction; the second discharge conveyor being pivotably mounted to operate in a direction selected between the first direction and the second direction; at least one of the first and second discharge conveyors being pivotably mounted to operate further in a direction selected between the first direction and a third direction; the first direction being forward; and the mobile multi-deck screening apparatus further comprising co-piling equipment (130, 140, 610-660) for selectively causing piling in a same pile oversize fraction material of the first screen deck and oversize fraction material of the second screen deck ; characterized in that the second and third directions point to opposite sides of the mobile multi-deck screening apparatus; the first direction is between the second and third directions, and the co-piling equipment comprises the first discharge conveyors and the second discharge conveyor directed to discharge material to the same pile, when the first discharge conveyor and the second discharge conveyor are in a same direction. a feeder configured to receive material for screening; a first screen deck configured to receive the material from the feeder; a first discharge conveyor configured to output an oversize fraction of the first screen deck ; a second screen deck configured to receive an undersize fraction of the first screen deck ; a second discharge conveyor configured to output an oversize fraction of the second screen deck ; the first discharge conveyor being pivotably mounted to operate in a direction selected between a first direction and a second direction, wherein the second direction differs from the first direction; the second discharge conveyor being pivotably mounted to operate in a direction selected between the first direction and the second direction; at least one of the first and second discharge conveyors being pivotably mounted to operate further in a direction selected between the first direction and a third direction; the first direction being forward; and the mobile multi-deck screening apparatus further comprising co-piling equipment (130, 140, 610-660) for selectively causing piling in a same pile oversize fraction material of the first screen deck and oversize fraction material of the second screen deck ; characterized in that the second and third directions point to opposite sides of the mobile multi-deck screening apparatus; the first direction is between the second and third directions, and the co-piling equipment comprises the first discharge conveyors and the second discharge conveyor directed to discharge material to the same pile, when the first discharge conveyor and the second discharge conveyor are in a same direction. <EOS>