Ervin Equipment's Bottom Dump Trailers can be used in terrain or other jobsite restrictions such as overhead obstacles may pose safety risks with traditional rear-dump trailers. Come in seven models of bottom dump trailers for use in oilfields, aggregate and asphalt industries. Its bottom dump trailers feature carrying capacities ranging from 18 to 31 cubic yards. A unique insulation system on these trailers provide a safe, simple, bottom dump solution for carrying hot-mix asphalt. This is a feature few competing bottom dump trailer manufacturers can offer. When working non-asphalt jobs, these trailers can be used for hauling road base, gravel, sand and dirt.