A heavy hauler typically consists of a heavy tractor unit and multi-axled lowboy flatbed trailer. It is suited for dump, flatbed, and lowboy use. It can also be a semi-tractor, pulling dump or lowboy trailers. The lowboy trailer comes in several types, for a wide range of tasks. Both the "III "Highboy"" and "III Lowboy" are pictured here. In March, Battery A moved from FSB Lowboy to FSB Two Bits to support 1/503rd. After the Dunstall organisation closed in the early 1980s, other specialists offered the Lowboy frame.