Abstract: An over the road truck having a hard top truck body which permits full length opening of the top for loading and unloading of cargo by overhead cranes, as well as substantially unobstructed access from the rear and either side thereof for loading by lift truck or manual means. To permit top access, the truck body has roof doors pivotably mounted on opposite sides of the body which are easily operable from an end of the body. The body further includes sliding side doors that permit access along the entire length of either side of the body, as well as end doors for rear loading. To permit maximum unobstructed access to the interior of the body while maintaining sufficient rigidity for extended over the road use, removable side and roof supports are provided.