World Library  
Flag as Inappropriate
Email this Article

Pillar (car)

Article Id: WHEBN0002984941
Reproduction Date:

Title: Pillar (car)  
Author: World Heritage Encyclopedia
Language: English
Subject: Hatchback, Car classification, Station wagon, AMC Rebel, Sedan (automobile)
Collection: Automotive Body Parts, Automotive Safety Technologies, Automotive Styling Features, Road Transport
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Pillar (car)

Typical pillar configurations of a sedan (three box), station wagon (two box) and hatchback (two box) from the same model range.
Typical pillar configurations of a sedan (three box) and station wagon (two box) from the same model range.
Diagram of a five-door hatchback (two-box) superimposed over the station wagon (two-box) from the same model range—in this case, both with a D-pillar.

Pillars are the vertical or near vertical supports of a car's window area or greenhouse—designated respectively as the A, B, C or D-pillar, moving from the front to rear, in profile view.

The consistent alphabetical designation of a car's pillars provides a common reference for design discussion and critical communication. As an example, rescue teams employ pillar nomenclature to facilitate communication when cutting wrecked vehicles, as when using the jaws of life.[1]

In American and British English, the pillars are sometimes referred to as posts (A-post, B-post etc.).

Contents

  • Design 1
  • See also 2
  • References 3
  • External links 4

Design

In the case of the B (or center) pillar on four-door sedans, the pillar is typically a closed steel structure welded at the bottom to the car's rocker panel and floorpan, as well as on the top to the roof rail or panel.[2] This pillar provides structural support the vehicle's roof panel, as well as designed for latching the front door and mounting the hinges for the rear doors.[2]

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.[3] Some designs employ slimmer, chamfered windscreen pillars, A pillars, to help improve driver vision (thus reducing blind spots) through the use of stronger alloy steel in these components.[3] As "perhaps the most complex of all the structures on the vehicle", the center or B-pillar may be a multi-layered assembly of various lengths and strengths.[4]

Closed vehicles without a B-pillar are widely called hardtops and have been available in two or four-door body styles, in sedans, coupes and wagons.[5] Designs without a center or "B" pillar for roof support behind the front doors offer increased occupant visibility, while in turn requiring underbody strengthening to maintain structural rigidity.[6] In the early 1970s, General Motors broadened their definition of "hardtop" to include models with a B-pillar although: "up to then, everybody thought a hardtop was a car without a center pillar."[7]

Pillars are implied, whether they exist or not; where a design's greenhouse features a break between windows or doors without vertical support at that position, the non-existent pillar is "skipped" when naming the other pillars. Thus a two-door hardtop or a three box designed coupé could have its rearmost pillar called the C-pillar even in the absence of a B-pillar. Conversely additional doors, such as on limousines, will create additional B-pillars; the B-pillars are then numbered, B1, B2, and so forth.

In addition to the pillar nomenclature derived from viewing an automobile in profile, some older cars have a two-part windshield or a split rear window, with the two halves separated by a pillar.

See also

References

  1. ^ Anderson, Brian G. (2005). Vehicle extrication: a practical guide. PennWell. pp. 141–143. Retrieved 12 September 2014. 
  2. ^ a b Scharff, Robert; Mullen, Keith; Corinchock, John A. (1990). Complete automotive estimating. Delmar Publishers. p. 172.  
  3. ^ a b Kenwright, Joe (4 November 2007). "Slimmer Commodore windscreen pillars coming". Carpoint Australia. Retrieved 12 September 2014. 
  4. ^ Thomas, Alfred; Jund, Michael (2013). Collision Repair and Refinishing: A Foundation Course for Technicians (Second ed.). Cengage Learning. pp. 479–480.  
  5. ^ "Rambler has everything new - even a hardtop wagon". Popular Mechanics 105 (1): 116–117. January 1956. Retrieved 12 September 2014. 
  6. ^ Thomas, Alfred; Jund, Michael (2009). Collision repair and refinishing: a foundation course for technicians. Cengage Learning. p. 164.  
  7. ^ Lund, Robert (June 1974). "Detroit Listening Post — same cars, different label". Popular Mechanics 141 (6): 42. Retrieved 12 September 2014. 

External links

  • "Art of Automotive C Pillars"—flickr photo group created 2005-07-26; webpage accessed 2008-02-10
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.