Cantilever

Cantilever at the five-finger cookie in Frankfurt

As a projection , also jut is referred to in the building industry , the protrusion or protruding internal of a component on the building line or from the cubic volume on the base beyond the building. The component can be a bay window , balcony , an entire floor or part of a building, or even a roof . A wide overhang is a gesture that is often used as a dramatic element in contemporary architecture .

description

From a structural point of view, one speaks of a cantilever . Structurally, the cantilever can be realized through cantilevered ceilings , corbels, consoles or in masonry construction through stepped wall layers. Today's construction technology enables enormous spans through the use of complex calculation methods and very resilient materials.

In the Middle Ages, this technique was often used in half-timbered houses in order to obtain a larger area on the floors with a small area of the building. Often it was cantilevered from floor to floor.

Projecting components that break through the insulation level of a building form thermal bridges and are therefore problematic from a building physics point of view. A classic example are reinforced concrete balconies that protrude as part of the floor slab . This problem must be countered with suitable measures (such as Schöck -Isokorb or all-round insulation) in order to avoid structural damage.

Examples

Half-timbered structure with a cantilevered upper storey and cleats (17th century)
Cantilever barn in Tennessee
Cantilevered rooms on the WOZOCO building by MVRDV (1997)
Projecting component of the Liaunig Museum (2008)
China Central Television Headquarters (2009)