A lowboy is a semi-trailer with two drops in deck height: one right after the gooseneck and one right before the wheels. This allows the deck to be extremely low compared with other trailers. It offers the ability to carry legal loads up to 12 ft tall, which other trailers cannot. Lowboys are used to haul heavy equipment such as bulldozers, industrial equipment etc.
Typically when you see a sign that says "Oversize Load" on the interstate, the cargo being hauled is done so with a lowboy trailer. Many shippers use lowboy models as their top choice for these jobs due to their capacity to carry extremely heavy weights of cargo, and their stability as the lowest, off-the-ground option.
As the name suggests, its bodywork is just an entirely flat, level 'bed' with no sides or roof. This allows for quick and easy loading of goods, and consequently they are used to transport heavy loads that are not delicate or vulnerable to rain, and also for abnormal loads that require more space than is available on a closed body.
Common uses include heavy loads that are not perishable, delicate or vulnerable to precipitation – since there is no cover to protect the freight. Examples of typical cargo:
Max. Freight Weight 48,000 lbs