Haunch
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A haunch [ vut ] ( French voûte "vault", "vault", "ceiling valley") is a triangular bevel or rounding of an (inner) corner, a support , the widening of an otherwise uniformly wide column under the support at the transition of a Column or pillar in a ceiling or wall .
In contrast, the bevel of the outer edge of a solid component is called a bevel .
A haunch can be straight or rounded ( concave curved, in the form of a fillet). The haunch on a column is ring-shaped and resembles a capital . Due to the haunch, the flow of forces becomes more even, which can be statically and economically advantageous and is also more aesthetic.
Construction
If a haunch is not used purely for decorative purposes, it can be used to introduce and distribute the loads introduced, to increase corner stiffness and to create a rigid corner .
In bridges , a haunch is also the increase in the construction height towards the supports , which enables better adaptation to the moment curve .
In rooms with increased cleaning requirements (hospital rooms, operating theaters etc.), the transition from wall to floor is rounded (haunched) to prevent dirt and pathogens from collecting in gaps between wall and floor. Such recesses make cleaning much easier.
Similarly, (corner) reinforcements on components such as T-beams or on the (plate) foundation for distributing line loads under walls and, in particular, point loads under columns, are called haunches.
In steel haunches are commonly used in reinforced concrete rare, because of the increased cost of the formwork .
Transportation
A cove in vehicles for passenger transport such as buses and rail vehicles is the connection between the side walls and the vehicle roof. This usually separate assembly is, in particular for visual reasons, co-determining the design of the vehicle from the outside of the vehicle and is functionally used to seal against water and air. The inside serves completely different functional purposes, e.g. B. lighting, ventilation, luggage rack or access opening. Vehicle technology is often installed between the outside and inside, e.g. B. compressed air tanks , switching technology , lines for compressed air , water and electricity .
Photo studio
Backgrounds (mostly roll-off cardboard webs) in photo studios are regularly designed in such a way that the transition from the vertical to the horizontal (floor) is executed as a hollow . This avoids the creation of an edge. For this background design, in addition to the term “hollow”, the term “haunch” is also used.
