Gravel Boxes are the roll off equivalent to a dump truck box. SCS gravel boxes are designed for heavy loads of aggregates or soil that can be dumped or spread. Gravel boxes are available in 14 or 16 foot lengths with air or electric tailgate release. A high lift gate, gravel chute or tarp system are some of the available options. Gravel boxes are available in hook lift or cable roll off understructure.