Abstract: There is a container assembly for mounting a container on a truck, operable in a dumping mode or a grounding mode, comprising a base frame mounted on the flatbed, a dumping frame, connected to the base frame and removably attachable to a lower jib the lower jib, supporting the container, removably attachable to the dumping frame and pivotally or removably attachable to the base frame and a first power cylinder configured to rotate the lower jib when the first cylinder is extended and wherein in the dumping mode the lower jib is removably connected to the dumping frame, and whereby, the lower jib rotates to a dumping angle of greater than 45 degrees and wherein in the grounding mode the lower jib is removably and pivotally connected to the base frame, and whereby, the lower jib rotates to a dumping angle of less than 45 degrees.