In by Jackie Dunn

The end of a building, as distinguished from the front or rear. The triangular end of an exterior wall from the level of the eaves to the ridge of a double-sloped roof. In house construction, the portion of the roof above the eave line of a double-sloped roof.

Merriam-Webster Online Dictionary
gable (noun)
a) the vertical triangular end of a building from cornice or eaves to ridge
b) the similar end of a gambrel roof
c) the end wall of a building
a triangular part or structure
Gable (biographical name)
(William) Clark 1901–1960 Am. actor
gable (Wikipedia)
A single-story house with three gables, although only two can be seen (highlighted in yellow). This intersection of gables is a crossed gable roof
Decorative gable roof at 176–178 St. John's Place between Sixth and Seventh Avenue in the Park Slope neighborhood of Brooklyn, New York City

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.[citation needed]

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.

The opposite or inverted form of a gable roof is a V-roof or butterfly roof.

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