This 2006 Doonan Specialized oilfield trailer — sometimes referred to as a stepdeck trailer or step-deck flatbed — is a heavy-haul transport unit designed to move oversized oilfield equipment, pipe, machinery, and related freight across job sites and public roads. Doonan Specialized is a well-regarded American trailer manufacturer known for building heavy-duty flatbed, step-deck, and specialized transport trailers used extensively in oilfield, energy, and industrial hauling applications.
The trailer features a two-level deck configuration typical of the stepdeck design. The upper deck measures 10 feet 5 inches in length, while the main lower deck extends 36 feet 6 inches, giving a combined overall length of 47 feet 6.5 inches. This arrangement lowers the ride height on the main deck relative to a standard flatbed, allowing taller or heavier loads to be carried while remaining within legal height restrictions.
The unit is equipped with an inverted fifth wheel, a configuration commonly used in oilfield and specialized transport applications to accommodate particular coupling or load requirements. Catwalks and walking rails run along both sides of the trailer, providing safe access for securing loads and for personnel working alongside the unit during loading and unloading operations. The trailer is listed under the Doonan Specialized model designation 482DB14T and is offered in used condition from a location in Utah, USA, priced at $23,500.
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