A type of vehicle body construction in which the outer skin, roof, and floor are formed and assembled to produce a single unit providing structural strength and rigidity. This concept was introduced in the 1920’s but was not widely used in mass-produced automobiles until the late 1970’s. Prior to this time, vehicle bodies were built and bolted to s [..]

or monocoque, a construction technique that utilizes the external skinning of an object to form most of the structure. This type of frame is used in the majority of vehicles today. Unibody vehicles have no conventional frame; instead it consists of rails welded to flat panels for strength and structural integrigy. The rails, rocker panels, pillars, [..]