Auto101; Pillars
The pillars on a car with permanent roof body style (such as four-door sedans) are the vertical or nearly vertical supports of its window area or greenhouse—designated respectively as the A, B, C and (in larger cars such as 4-door station wagons and sport utility vehicles) D-pillar, moving from front to rear, in profile view. NOMENCLATURE: Car pillars are vertical or inclined components of an enclosed automobile's body that both support its roof and reinforce the torsional rigidity of the body. An alphabetical convention for designating a car's pillars has developed over time, used variously by the automotive press in describing and reviewing vehicles, insurance companies in identifying damaged components, and first-responder rescue teams to facilitate communication, as when using the jaws of life to cut their way into a wreck. The letters A, B, C, and D are used (in upper case): The A-pillar is the forward-most pillar on a vehicle, supporting its roof at each corner of the wi