Frame (vehicle)
In a unibody (also unit body) design, the sheet metal of the body is also the frame. It may use subframes in certain areas. Unibody designs first appeared in the 1930s on some Citroën automobiles. Many modern vehicles use unibody construction including cars, minivans and crossovers. A few SUVs use unibody construction. An example is the Dodge Durango.