Abstract: A tarp assembly for container trucks comprising a roll-up assembly that is mounted to the top of a fixed-height gantry framework, the gantry framework being welded to the frame of the truck in front of the tilt frame of the truck. A manual crank assembly is mounted to a bracket extending from a lower portion of the gantry framework and is operatively connected to the shaft of the roll-up assembly by a continuous chain and sprockets.