three-centered arch
Noun: A three-centered arch is a specific type of architectural arch. It is a round arch whose inner curve (the intrados) is not drawn from a single center point but is instead constructed using three separate center points. This creates a shape that is flatter than a true semicircle but more rounded than a standard elliptical arch, often resembling a shallow, elongated curve.
The term is used in architecture, construction, and historical description to specify the geometric construction and visual profile of an archway, door, or window. * The bridge's design featured a broad three-centered arch to allow for greater headroom. * In Georgian architecture, three-centered arches were commonly used above elegant fanlight windows.
- The three-centered arch is sometimes called a basket-handle arch due to its resemblance to the curved handle of a basket. This is a descriptive synonym rather than a technical variant.
- This arch type is often analyzed in contrast to a two-centered arch (a standard Gothic or pointed arch) and a four-centered arch (a Tudor arch).
- Basket-handle arch: A common alternative name for a three-centered arch.
- Elliptical arch: A different type of arch whose curve is a true ellipse, often compared to the three-centered arch.
- Segmental arch: A simpler arch whose curve is a segment of a circle, drawn from a single center.
- Basket-handle arch
- Two-centered arch (pointed arch)
- Semicircular arch (one-centered arch)
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a round arch whose inner curve is drawn with circles having three centers
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