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Spandrel

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Definitions
A Salamander Occupies an Arch's Spandrel
A spandrel is the irregular triangle space between two arches or a single arch, and its rectangular enclosure. It is also the space between the top of the window on one story of a building and the sill of the window on the story above. These spaces are often adorned with elaborate designs or decorations.[1]

Closed-spandrel: A closed-spandrel is when the area is completely filled in (usually with stone or earth).[2]

Open-spandrel: An open-spandrel is when the area is supported by ribs or columns, leaving some space unfilled. This method uses less material and weighs less.[3]

[edit] References

  1. Glossary of Architectural Terms. The New York City Landmarks Preservation Commission [December 21, 2009].
  2. Highways Agency. Inspection manual for highway structures: Vol. 1. TSO: 2007.
  3. Highways Agency. Inspection manual for highway structures: Vol. 1. TSO: 2007.