A pickup truck can include a bed that is configured to be rotatable. The bed can be defined in part by a first side wall, a second side wall, a front wall, a back wall, and a floor. The bed can include a standard position in which the first and second side walls of the bed can be substantially parallel to a longitudinal direction of the pickup truck. The bed can be selectively rotatable about an axis of rotation into one or more rotated positions. In a rotated position, the first and second side walls can be angled relative to the longitudinal direction. The bed can also be raised in an elevational direction such that a lowermost point of the bed is located above a chassis frame of the pickup truck. A rotatable bed can expand its uses and allow for convenient access to the bed from a desired position.

A cylinder propping system includes a sleeve and a locking member. The sleeve includes an outer wall that defines an inner cavity and a ledge. The inner cavity is sized to receive at least a portion of a cylinder assembly therein. A first end of the outer wall is configured to hingedly couple to one end of the cylinder assembly. The ledge is spaced apart from the first end. The locking member is sized to engage with the ledge, between the ledge and a cylinder housing of the cylinder assembly, to prevent movement of the cylinder housing in at least one direction along a central axis of the sleeve.

A roll off trailer includes first and second trolley assemblies and a hoisting cable connected at one end to the first trolley assemble and extending about a sheave in each of the first and second trolley assemblies. The cable connects to a container. The second trolley is displaced t in a first direction while simultaneously drawing the container via the cable from the first grounded container to a second container position generally midway atop the trailer. Then, the first trolley is displaced in a second direction while simultaneously drawing the container via the cable from the second container position to a third container position generally adjacent the front of the trailer.

A roll off trailer includes first and second trolley assemblies and a hoisting cable connected at one end to the first trolley assemble and extending about a sheave in each of the first and second trolley assemblies. The cable connects to a container. The second trolley is displaced in a first direction while simultaneously drawing the container via the cable from the first grounded container position to a second container position generally midway atop the trailer. Then, the first trolley is displaced in a second direction while simultaneously drawing the container via the cable from the second container position to a third container position generally adjacent the front of the trailer.

An upper weldment includes a first vertical web having a first top edge, a first flange extending horizontally from the first top edge, a second vertical web having a second top edge, and a second flange extending horizontally towards the first flange from the second top edge. The first flange and the second flange are attached. In some cases, the upper weldment is configured to form a three-sided enclosure around a hydraulic cylinder when the hoist is in a closed position. In some cases, the upper weldment and the lower weldment are made of mild steel. A dump trailer hoist includes a main hinge, a lower weldment attached to the main hinge, and the upper weldment described above attached to the main hinge.

An upper weldment includes a first vertical web having a first top edge, a first flange extending horizontally from the first top edge, a second vertical web having a second top edge, and a second flange extending horizontally towards the first flange from the second top edge. The first flange and the second flange are attached. In some cases, the upper weldment is configured to form a three-sided enclosure around a hydraulic cylinder when the hoist is in a closed position. In some cases, the upper weldment and the lower weldment are made of mild steel. A dump trailer hoist includes a main hinge, a lower weldment attached to the main hinge, and the upper weldment described above attached to the main hinge.