How many types of semi truck trailers are there?

There are eight common semi truck trailer types: dry van, flatbed, step deck, Conestoga, double drop, removable gooseneck (RGN), hotshot, and refrigerated reefer. They divide into enclosed trailers, open-deck trailers, and specialized trailers, and each is built for a different kind of freight.

What is the most common type of trailer?

The dry van is the most common trailer on the road. It is a fully enclosed trailer used for palletized and packaged freight that needs protection from weather but no temperature control, which covers the majority of general freight moving between manufacturers, distribution centers, and customers.

What is the difference between a flatbed and a step deck?

A standard flatbed has a single deck about four to five feet off the ground. A step deck, or drop deck, has a lower main deck that adds roughly two feet of vertical clearance, so taller freight can ship legally without an over-height permit. Both load from the side, top, or rear.

What is the difference between a Conestoga and a flatbed?

A flatbed is an open deck with no cover. A Conestoga is a flatbed with a retractable tarp-and-curtain system that rolls over the load. The Conestoga gives you flatbed-style side and overhead loading plus weather protection, without the time and labor of hand-tarping.

What trailer is used for oversized loads?

Oversized loads typically move on specialized trailers. A double drop, or lowboy, has a deep low well for very tall freight, and a removable gooseneck (RGN) detaches at the front to form a ramp for heavy rolling equipment. Both require permits, and often escorts, that standard trailers do not.

What is the difference between a dry van and a reefer?

A dry van and a reefer look similar from the outside, but a reefer adds insulated walls and a temperature-control unit. A dry van protects freight from weather only; a reefer holds freight within a set temperature range for food, beverages, and pharmaceuticals.

What is a plated trailer?

A plated trailer is a dry van with smooth, hard interior wall panels, often composite or metal, instead of a tracked logistics-post lining. Plated walls are more durable and slightly narrower; logistics-post walls make load-bar and strap securement easier. Which one suits depends on the freight.

What is a hotshot trailer?

A hotshot trailer is a smaller flatbed-style trailer pulled by a heavy-duty pickup rather than a full semi tractor. Hotshot hauling handles smaller, time-sensitive open-deck loads that do not need a full-size truck, and it is a different operating model from full-size asset-based trucking.

What are the legal size limits for a semi truck trailer?

On interstate highways, a loaded tractor-trailer is capped at 80,000 pounds gross weight and 102 inches (8 feet 6 inches) wide. There is no single federal height limit; each state sets its own, and 13 feet 6 inches is the common standard. Loads beyond these limits need permits.

How do I choose the right trailer type for my freight?

Ask four questions: is the freight enclosed or open-deck, how tall is it, does it need weather protection, and is it within legal size and weight. Enclosed goes on a dry van or reefer; open-deck goes on a flatbed, step deck, or Conestoga depending on height and weather; oversized needs a specialized trailer.