What is the primary purpose of a corbel in construction?

A corbel is a structural feature used in construction to support the weight of elements above it, such as beams or arches. When incorporated into walls or ceilings, corbels project from the surface and bear loads, essentially acting as brackets that transfer the weight to the wall below, thus ensuring stability and integrity of the structure.

While corbels can sometimes have decorative aspects that enhance the aesthetic appeal of a building's design, their primary function is indeed to support structural elements. This support is crucial in ensuring that loads are evenly distributed and that the structural integrity is maintained.

The other choices present functions that are not the primary purpose of a corbel. Since electrical systems do not rely on corbels for support, corbels typically do not facilitate ventilation, and while they may add visual interest to a structure, that is not their main role. Understanding that the essential function of corbels is to provide necessary structural support helps clarify their significance in construction.