Embodiments of the present disclosure include systems and methods for collecting, storing, separating, and disposing of waste material from an oil and gas well site in order to enhance payload efficiency. An embodiment of a method, for example, may include introducing a waste material into an enhanced-payload mobile vessel positioned at the oil and gas well site, the waste material selected to include one or more of a sludge waste material, a solids-laden wastewater material, and a dry waste material. The method may further include transporting the waste material when positioned in the enhanced-payload mobile vessel along roadways to an off-site waste management facility. Additionally, the method may include dumping the waste material from the enhanced-payload mobile vessel by a site-based lifting mechanism into a receiving vessel at the off-site waste management facility thereby to dispose of the waste material at a reduced transportation cost.

A door prop assembly for selectively supporting a rear gate of a tilting vehicle. Said door prop assembly is configured to selectively prop said rear gate in an open configuration and safely release said rear gate to transition to a closed configuration. Said door prop assembly comprises a prop arm assembly, a lock bar assembly, a distal mount assembly, and a rotating lock arm. Said distal mount assembly is attached to a side portion of said rear gate. Said lock bar assembly is attached to a side portion of a tilting body. Said prop arm assembly comprises a substantially straight element being adapted to slide through portions of a lock bar of said lock bar assembly. Said rotating lock arm is configured to rotate freely on a locking hook hinge. A side plates at a distal hinge is configured to rotate freely relative to said distal mount assembly.

A door prop assembly for selectively supporting a rear gate of a tilting vehicle. Said door prop assembly is configured to selectively prop said rear gate in an open configuration and safely release said rear gate to transition to a closed configuration. Said door prop assembly comprises a prop arm assembly, a lock bar assembly, a distal mount assembly, and a rotating lock arm. Said distal mount assembly is attached to a side portion of said rear gate. Said lock bar assembly is attached to a side portion of a tilting body. Said prop arm assembly comprises a substantially straight element being adapted to slide through portions of a lock bar of said lock bar assembly. Said rotating lock arm is configured to rotate freely on a locking hook hinge. A side plates at a distal hinge is configured to rotate freely relative to said distal mount assembly.

A system including a container having a door pivotably coupled to the container that is movable between a first position and a second position. A locking assembly is coupled with the container and includes a first shaft and a second shaft generally parallel with and spaced apart from the first shaft, and an over center linkage extending between a respective first pivotal connection between the over center linkage and the first shaft and a respective second pivotal connection between the over center linkage and the second shaft. Further, the locking assembly includes at least one latch coupled with the second shaft and movable between an unlatched position and a latched position. The over center linkage is movable, when the door is at the second position, over center to a state at which the latch is in the latched position and the door is biased toward the second position.

A system including a container having a door pivotably coupled to the container that is movable between a first position and a second position. A locking assembly is coupled with the container and includes a first shaft and a second shaft generally parallel with and spaced apart from the first shaft, and an over center linkage extending between a respective first pivotal connection between the over center linkage and the first shaft and a respective second pivotal connection between the over center linkage and the second shaft. Further, the locking assembly includes at least one latch coupled with the second shaft and movable between an unlatched position and a latched position. The over center linkage is movable, when the door is at the second position, over center to a state at which the latch is in the latched position and the door is biased toward the second position.

A cargo bay accessory for inserting into a cargo bay of a truck, the cargo bay accessory having opposing stepped side walls forming horizontal support surfaces at different elevations, wherein the support surfaces on one side are at the same elevation as the support surfaces on the opposite side, and wherein the lower support surfaces are laterally spaced closer together than higher support surfaces.

A cargo bay accessory for inserting into a cargo bay of a truck, the cargo bay accessory having opposing stepped side walls forming horizontal support surfaces at different elevations, wherein the support surfaces on one side are at the same elevation as the support surfaces on the opposite side, and wherein the lower support surfaces are laterally spaced closer together than higher support surfaces.

A tailgate assembly for a vehicle includes a tailgate configured to rotatably couple to a main body of the vehicle, and an overrotation mechanism coupled to a sidewall of the tailgate. The overrotation mechanism is configured to be disposed between the tailgate and the main body, and to enable the tailgate to move between a closed position and a horizontal open position, and between the horizontal open position and an overrotation position where the tailgate is disposed toward the ground at an angle relative to a horizontal.

A tailgate assembly for a vehicle includes a tailgate configured to rotatably couple to a main body of the vehicle, and an overrotation mechanism coupled to a sidewall of the tailgate. The overrotation mechanism is configured to be disposed between the tailgate and the main body, and to enable the tailgate to move between a closed position and a horizontal open position, and between the horizontal open position and an overrotation position where the tailgate is disposed toward the ground at an angle relative to a horizontal.

A load-carrier vehicle includes a load container; and a visual sensor device arranged at an upper part of the load container, wherein the visual sensor device is arranged to monitor an upper load level of the load container and detect an object present at the upper load level.