According to some embodiments, a railcar comprises a center sill extending along a longitudinal centerline of the railcar, and two side sills. The two side sills are on opposite sides of, and extend parallel with, the center sill. The railcar further comprises a first inner discharge door coupled to the railcar proximate the center sill on a first side of a longitudinal centerline of the railcar (first side); a second inner discharge door coupled to the railcar proximate the center sill on a second side of the longitudinal centerline (second side); a first outer discharge door coupled proximate the side sill on the first side; a second outer discharge door coupled proximate the side sill on the second side; a first linkage coupling the first inner discharge door to the second outer discharge door; and a second linkage coupling the second inner discharge door to the first outer discharge door.

According to some embodiments, a railcar comprises a center sill extending along a longitudinal centerline of the railcar, and two side sills. The two side sills are on opposite sides of, and extend parallel with, the center sill. The railcar further comprises a first inner discharge door coupled to the railcar proximate the center sill on a first side of a longitudinal centerline of the railcar (first side); a second inner discharge door coupled to the railcar proximate the center sill on a second side of the longitudinal centerline (second side); a first outer discharge door coupled proximate the side sill on the first side; a second outer discharge door coupled proximate the side sill on the second side; a first linkage coupling the first inner discharge door to the second outer discharge door; and a second linkage coupling the second inner discharge door to the first outer discharge door.

According to some embodiments, a railcar comprises an underframe and at least one hopper. The hopper is configured to transport a lading material. A longitudinal sliding gate assembly is coupled to the hopper and comprises: a pair of side walls coupled to a pair of end walls forming a discharge opening; a pair of tracks, one coupled to each end wall; a sliding gate slidably coupled to the pair of tracks; and a threaded drive screw coupled to the sliding gate and to the pair of side walls. Rotation of the threaded drive screw in a first direction moves the sliding gate along the tracks to an open position that permits the lading material to discharge, and rotation of the threaded drive screw in an opposite direction moves the sliding gate along the tracks to a closed position that restricts the lading material from discharging.

According to some embodiments, a railcar comprises an underframe and at least one hopper. The hopper is configured to transport a lading material. A longitudinal sliding gate assembly is coupled to the hopper and comprises: a pair of side walls coupled to a pair of end walls forming a discharge opening; a pair of tracks, one coupled to each end wall; a sliding gate slidably coupled to the pair of tracks; and a threaded drive screw coupled to the sliding gate and to the pair of side walls. Rotation of the threaded drive screw in a first direction moves the sliding gate along the tracks to an open position that permits the lading material to discharge, and rotation of the threaded drive screw in an opposite direction moves the sliding gate along the tracks to a closed position that restricts the lading material from discharging.

According to some embodiments, a railcar comprises a center sill extending along a longitudinal centerline of the railcar, and two side sills. The two side sills are on opposite sides of, and extend parallel with, the center sill. The railcar further comprises a first inner discharge door coupled to the railcar proximate the center sill on a first side of a longitudinal centerline of the railcar (first side); a second inner discharge door coupled to the railcar proximate the center sill on a second side of the longitudinal centerline (second side); a first outer discharge door coupled proximate the side sill on the first side; a second outer discharge door coupled proximate the side sill on the second side; a first linkage coupling the first inner discharge door to the second outer discharge door; and a second linkage coupling the second inner discharge door to the first outer discharge door.

According to some embodiments, a railcar comprises a center sill extending along a longitudinal centerline of the railcar, and two side sills. The two side sills are on opposite sides of, and extend parallel with, the center sill. The railcar further comprises a first inner discharge door coupled to the railcar proximate the center sill on a first side of a longitudinal centerline of the railcar (first side); a second inner discharge door coupled to the railcar proximate the center sill on a second side of the longitudinal centerline (second side); a first outer discharge door coupled proximate the side sill on the first side; a second outer discharge door coupled proximate the side sill on the second side; a first linkage coupling the first inner discharge door to the second outer discharge door; and a second linkage coupling the second inner discharge door to the first outer discharge door.

According to some embodiments, a railcar comprises a center sill extending along a longitudinal centerline of the railcar, and two side sills. The two side sills are on opposite sides of, and extend parallel with, the center sill. The railcar further comprises a first inner discharge door coupled to the railcar proximate the center sill on a first sick of a longitudinal centerline of the railcar (first side); a second inner discharge door coupled to the railcar proximate the center sill on a second side of the longitudinal centerline (second side); a first outer discharge door coupled proximate the side sill on the first side; a second outer discharge door coupled proximate the side sill on the second side; a first linkage coupling the first inner discharge door to the second outer discharge door; and a second linkage coupling the second inner discharge door to the first outer discharge door.

According to some embodiments, a railcar comprises a center sill extending along a longitudinal centerline of the railcar, and two side sills. The two side sills are on opposite sides of, and extend parallel with, the center sill. The railcar further comprises a first inner discharge door coupled to the railcar proximate the center sill on a first sick of a longitudinal centerline of the railcar (first side); a second inner discharge door coupled to the railcar proximate the center sill on a second side of the longitudinal centerline (second side); a first outer discharge door coupled proximate the side sill on the first side; a second outer discharge door coupled proximate the side sill on the second side; a first linkage coupling the first inner discharge door to the second outer discharge door; and a second linkage coupling the second inner discharge door to the first outer discharge door.

According to some embodiments, a railcar comprises an underframe and at least one hopper. The hopper is configured to transport a lading material. A longitudinal sliding gate assembly is coupled to the hopper and comprises: a pair of side walls coupled to a pair of end walls forming a discharge opening; a pair of tracks, one coupled to each end wall; a sliding gate slidably coupled to the pair of tracks; and a threaded drive screw coupled to the sliding gate and to the pair of side walls. Rotation of the threaded drive screw in a first direction moves the sliding gate along the tracks to an open position that permits the lading material to discharge, and rotation of the threaded drive screw in an opposite direction moves the sliding gate along the tracks to a closed position that restricts the lading material from discharging.

According to some embodiments, a railcar comprises an underframe and at least one hopper. The hopper is configured to transport a lading material. A longitudinal sliding gate assembly is coupled to the hopper and comprises: a pair of side walls coupled to a pair of end walls forming a discharge opening; a pair of tracks, one coupled to each end wall; a sliding gate slidably coupled to the pair of tracks; and a threaded drive screw coupled to the sliding gate and to the pair of side walls. Rotation of the threaded drive screw in a first direction moves the sliding gate along the tracks to an open position that permits the lading material to discharge, and rotation of the threaded drive screw in an opposite direction moves the sliding gate along the tracks to a closed position that restricts the lading material from discharging.