dry bulk (hopper) trailer

(road transportation) A truck trailer designed to carry dry, free-flowing, bulk commodities including grain, shelled corn, cornmeal, feeds, hulled rice, beans, gravel, limestone (loose and pulverized), and sand. Hopper configurations include single, double, and triple hoppers, as well as open- and closed-end configurations. Available as singles, tandems, and three-trailer truck “trains.” Dry bulk trailers use rolled tarpaulin tops rather than rigid tops. Dry bulk trailers typically use hoppers to unload; however, others employ conveyor systems.

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