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Pillar (car)
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Pillar (car)
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.
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):
Posts for quarter windows (a smaller typically opening window on older vehicles between the front door window and windshield, and sometimes found in the rear, usually fixed) are not considered roof pillars.
Body pillars are critical in providing strength to an automobile body. As the most costly body components to develop or re-tool, a vehicle's roof and door design are a major factor in meeting safety and crash standards. Before safety standards, pillars were typically thin. The design of body pillars has changed with regulations that provide roof crush protection. Standards in the United States were introduced in phases starting in 2009 that require enclosed passenger cars to be able to support from 1.5-times to 3.0-times the vehicle's unloaded weight on its roof while maintaining headroom (survival space) for occupants.
This has meant designing thicker roof pillars that not only provide sufficient strength, but that also incorporate padding and accommodate airbags. However, because thicker A-pillars can somewhat limit the driver's forward field of vision and thus create blind spots, some designs employ slimmer, chamfered A-pillars made of stronger alloy steel on each side of the windshield to help improve driver vision while still meeting safety standards and offering crash protection.
One of the important design elements of modern cars is the A-pillar because its location and angle impact the shape of the front of the car and the overall shape of modern vehicles or what designers call "volume." For example, more forward positioned A-pillars provide for increased interior room and make for less angle and visual difference between the hood and windshield. This arrangement makes the side view of a car look aerodynamic. The A-pillars that are positioned further back on a vehicle are most often found on rear-wheel drive and SUV models. This arrangement provides a greater hood to windshield angle as well as achieving a bigger field of view for the driver, but at the disadvantage of encroaching on interior space.
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Pillar (car)
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.
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):
Posts for quarter windows (a smaller typically opening window on older vehicles between the front door window and windshield, and sometimes found in the rear, usually fixed) are not considered roof pillars.
Body pillars are critical in providing strength to an automobile body. As the most costly body components to develop or re-tool, a vehicle's roof and door design are a major factor in meeting safety and crash standards. Before safety standards, pillars were typically thin. The design of body pillars has changed with regulations that provide roof crush protection. Standards in the United States were introduced in phases starting in 2009 that require enclosed passenger cars to be able to support from 1.5-times to 3.0-times the vehicle's unloaded weight on its roof while maintaining headroom (survival space) for occupants.
This has meant designing thicker roof pillars that not only provide sufficient strength, but that also incorporate padding and accommodate airbags. However, because thicker A-pillars can somewhat limit the driver's forward field of vision and thus create blind spots, some designs employ slimmer, chamfered A-pillars made of stronger alloy steel on each side of the windshield to help improve driver vision while still meeting safety standards and offering crash protection.
One of the important design elements of modern cars is the A-pillar because its location and angle impact the shape of the front of the car and the overall shape of modern vehicles or what designers call "volume." For example, more forward positioned A-pillars provide for increased interior room and make for less angle and visual difference between the hood and windshield. This arrangement makes the side view of a car look aerodynamic. The A-pillars that are positioned further back on a vehicle are most often found on rear-wheel drive and SUV models. This arrangement provides a greater hood to windshield angle as well as achieving a bigger field of view for the driver, but at the disadvantage of encroaching on interior space.
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