Different Types of Heavy Haul Trailers

Heavy hauling machines carry large or awkward loads to different destinations. They typically consist of a heavy tractor unit with a multi-axled trailer. In fact, heavy haulers are split into axle categories; specifically, 5, 6, 7, 8, 10, 13, and 19. These categories indicate the sets of wheels attached to the trailer. The higher the axle, the more loads the truck can transport. It’s important to know the different types of heavy haul trailers so that you know which ones to use for your next project.

Flatbed Trailer

Flatbed trailers are some of the most common types of trailers used today due to their versatility. You can store loads on the open, flat tip, sides, and rear. They have a maximum freight weight of 48,000 lbs. and measure anywhere from 48’-53’ in length. Similarly, spread axle trailers are designed the same as flatbed trailers, but they have single axles spread apart at greater distances.

Lowboy Trailer

A lowboy trailer has two drops in the height deck after the gooseneck and right before the wheels. This allows the deck to hang lower to the ground than other trailers. Unlike other trailers, lowboys can carry loads up to 12’ tall and large equipment, such as bulldozers or industrial equipment. A 2-axle lowboy trailer can carry up to approximately 40,000 lbs.

Step-Deck Trailer

These trailers are the most commonly used today and have a floor that drops a level once clear of the tractor unit. Step-deck trailers are a type of flatbed trailer with a bottom and top deck. Manufacturers designed them to fit heavy equipment, such as a bulldozer or crane, that wouldn’t fit on a standard flatbed trailer. These trailers became so common that some have built-in ramps for easy loading versatility. They can also hold a maximum weight of 48,000 lbs.

Stretch Single Drop and Double Drop Deck Trailers

Stretch single and stretch double drop deck trailers are specifically designed to haul long loads a traditional flatbed or step-deck cannot handle. Double drop trailers allow for loads to be as tall as 10 feet, and it includes a “well,” which is a longer piece at the back deck and middle. Both can handle about 45,000 lbs. and can stretch to a length between 30’ to 65’.

Removable Gooseneck Trailers

Removable Gooseneck Trailers (RGN) are optimal for carrying tall and long freights. The front is detachable, and it allows the bottom to lower to create a ramp. RGNs can handle loads as heavy as 42,000 lbs., but stretch RGNs can hold more.

At NessCampbell Crane + Rigging, one of the best crane companies in Portland, Oregon, we have the right haulers for any application. Our extensive fleet of haulers, cranes, and rigging machines will fit the needs of your next construction project.