SEMI TRAILER TYPES AND DIMENSIONS
The standard semi-trailer dimensions, set by the U.S. Department of Transportation, allow for lengths of 48 to 53 feet. That is the standard length the federal government has set for use on highways across the country.
Variations in length and height are common, but width is more standardized. The standard dimensions of semi-trailers are:
Length: 48 - 53 feet (576 - 636 inches)
Width: 8.5 feet (102 inches)
Height: 13.5 feet (162 inches)
Check out the below details of the most common trailer types used in freight shipping and logistics.
REEFER TRAILER
Reefer semi trailers are designed to transport products which require to be kept at a specific temperature or temperature range through the entirety of the transit. While reefers are traditionally utilized to keep freight cold, reefers have the ability to be kept at warmer temperatures to protect freight from freezing, or run dry freight with the refrigeration unit turned off.
DRY VAN TRAILER
Dry van semi trailers are designed to transport the most versatile of dry products due to the fully enclosed nature of the trailer, which allows freight to be protected from the elements. Palletized products are most common as they can be efficiently and safely loaded / unloaded with a forklift or pallet jack from a dock.
CONESTOGA TRAILER
Conestoga semi trailers are designed to offer the enclosed nature of a dry van, while providing the same loading / unloading capabilities of a flatbed. A sliding curtain, when open, allows for freight to be loaded / unloaded from the side, rear, or top. When closed, the curtain offers the weather protection of a dry van without the risk of tarps rubbing against the freight.
FLATBED TRAILER
Flatbed semi trailers are designed to transport products which are long, heavy or oddly proportioned which creates a challenge when loading/unloading an enclosed trailer. The open nature of the trailer allows for loading / unloading from the rear, sides or top; allowing forklifts and cranes to create an even lift on the freight. Flatbeds are best suited being loaded / unloaded from the ground, rather than from a dock.
STEP DECK TRAILER
Step deck semi trailers, also known as drop decks, are designed to transport products which are too tall for a standard flatbed. The trailer consists of two decks, the upper and lower. The use of the lower deck, or well, allows for freight up to 10’ high to be legally transported, while still providing the same loading / unloading capabilities of a standard flatbed.