A flatbed trailer is an example of an open deck device that has neither sides nor a roof. It is mostly used to move bulky, wide, heavy, and insensitive items like machinery, building materials, or equipment. It is significantly simpler to load and unload cargo because of the flat design of the body.

This makes it possible to load items quickly and easily, transport big loads that are not sensitive or susceptible to precipitation, like construction equipment, and also unusual cargoes that need extra room.