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A gable is the generally triangular portion of a wall between the edges of intersecting roof pitches. The shape of the gable and how it is detailed depends on the structural system used, which reflects climate, material availability, and aesthetic concerns. A gable wall or gable end more commonly refers to the entire wall, including the gable and the wall below it.
A variation of the gable is a crow-stepped gable, which has a stairstep design to accomplish the sloping portion.
Gable ends of more recent buildings are often treated in the same way as the Classic pediment form. But unlike Classical structures, which operate through trabeation, the gable ends of many buildings are actually bearing-wall structures. Thus, the detailing can be ambiguous or misleading.
Gable style is also used in the design of fabric structures, with varying degree sloped roofs, dependent on how much snowfall is expected.
Sharp gable roofs are a characteristic of the Gothic and classical Greek styles of architecture.
Front-gabled and side-gabled
While a front-gabled building faces the street with its gable, a side-gabled building faces it with its cullis, meaning the ridge is parallel to the street. The terms are used in architecture and city planning to determine a building in its urban situation.
Side-gabled buildings are considered typical for German city streets in the medieval gothic period, while later Renaissance buildings, influenced by Italian art are often side-gabled. In America front-gabled houses as the Gablefront house were popular primarily between the early 19th century and 1920.
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The gable end roof is a poor design for hurricane regions, as it easily peels off in strong winds. When wind flows over a gable roof, the surface behaves like a wing. Lift is created on the leeward side of the roof. The flatter the roof, the more likely this will happen. A steep roof tends to cause the wind to stall as it goes over the roof and breaks up the effect. The addition of a vertical fin to low-pitched roofs can also help. Thirty-five degrees is the effective pitch of a roof where uplift is achieved or not – below 35 degrees the roof is subject to uplift; above this the roof is pushed down onto the wall plate.
- Bell-gable – Espadaña
- Crow-stepped gable
- Dutch gable
- Gablet roof
- Hip roof
- Cape Dutch architecture
- Anne of Green Gables
- The House of the Seven Gables
- John Ruskin's The Seven Lamps of Architecture for an influential opinion on truth in architecture
- Passmore, Augustine C.. "Twenty Styles of Architecture". Handbook of technical terms used in architecture and building and their allied trades and subjects,. London: Scott, Greenwood, and Co.;, 1904. 360. Print.
- Roof damage by hurricane force winds in Bermuda The Fabian Experience, September 2003, page 5, Mark Rowe, Department of Environmental Protection, Government of Bermuda
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