Abstract: A heavy duty sheave especially for use in supporting the stresses and strains on a wire cable in loosening the frozen load of waste within a roll-off box, to permit discharge of the load, without breakage of the sheave is formed of a solid disc of hot rolled steel plate circumferentially butt welded to a pair of outer steel washers to form a cable groove of curved cross section. To avoid breakage of sheaves by substitution of weaker units, each sheave of the invention includes identification means recognizable by the manufacturer but not readily noted or discovered by the user.

Abstract: A large, sealed, roll-off container of compacted waste is provided with a transversely extending, angle iron, ejection bar which is instantly, progressively pulled rearwardly along the floor of the container by a cable attached to the frame of a tilt bed vehicle, as the tilt bed is lifted to discharge the compacted load through a rear opening. A pair of extension cables are normally looped around the front end of the load and pressed against the inside wall surfaces of the container by the force of compaction. These cables compress the front of the load to free it from adherence to the walls immediately upon tilt.

Abstract: A large, sealed, roll-off container of compacted waste is provided with a transversely extending, angle iron, ejection bar which is instantly, progressively pulled rearwardly along the floor of the container by a cable attached to the frame of a tilt bed vehicle, as the tilt bed is lifted to discharge the compacted load through a rear opening. A pair of extension cables are normally looped around the front end of the load and pressed against the inside wall surfaces of the container by the force of compaction. These cables compress the front of the load to free it from adherence to the walls immediately upon tilt.