Beall's aluminum "bullet bottom" dump trailer has been in the company's product line since 1975. It is capable, says the manufacturer, of carrying 8-inch-minus material, including gravel, sand, asphalt and coal. Bottom-dump configurations also include a three-axle semi-trailer version with a six-axle pull unit, and a two-axle "Light Weight Aggregates" version with a three-axle pull. End-dump trailers in Beall's line include a two-axle, aluminum model and the Hardbody, which is a steel, half-round model featuring single-point suspension and a 44,000-pound capacity.