Types of Semi Trucks and Trailers: Semi Truck Trailer Types and Configurations

When two trailers of equal length are connected in tandem by a converter dolly, the configuration is called 'doubles.'

Study reference: ODOT Trucking Terminology and Acronyms (general vocabulary only). Follow current official guidance and your employer’s procedures.

A belly dump trailer unloads through a hopper in the bottom, making it suitable for certain bulk materials.

Study reference: ODOT Trucking Terminology and Acronyms (general vocabulary only). Follow current official guidance and your employer’s procedures.

Standard-sized rectangular boxes used for intermodal transport are called containers.

Study reference: ODOT Trucking Terminology and Acronyms (general vocabulary only). Follow current official guidance and your employer’s procedures.

A container chassis is designed with a skeleton frame and locking devices for intermodal containers.

Study reference: ODOT Trucking Terminology and Acronyms (general vocabulary only). Follow current official guidance and your employer’s procedures.

Operating a tractor without a trailer is known as 'bobtail.'

Study reference: ODOT Trucking Terminology and Acronyms (general vocabulary only). Follow current official guidance and your employer’s procedures.

A chip truck is designed specifically to carry wood chips, using a large, lightweight box on a semi-trailer.

Study reference: ODOT Trucking Terminology and Acronyms (general vocabulary only). Follow current official guidance and your employer’s procedures.

Bulk carriers are used to transport loose, unpackaged materials like gravel.

Study reference: ODOT Trucking Terminology and Acronyms (general vocabulary only). Follow current official guidance and your employer’s procedures.

A 'bunk' is a device used to support and secure logs during transport, mounted at a right angle to the truck's direction.

Study reference: ODOT Trucking Terminology and Acronyms (general vocabulary only). Follow current official guidance and your employer’s procedures.

A Conestoga trailer has a retractable tarping system, offering weather protection and the ease of loading/unloading.

Study reference: ODOT Trucking Terminology and Acronyms (general vocabulary only). Follow current official guidance and your employer’s procedures.

Carrying an empty trailer on another empty trailer or chassis is known as 'decked trailer' practice.

Study reference: ODOT Trucking Terminology and Acronyms (general vocabulary only). Follow current official guidance and your employer’s procedures.