What is the maximum corbelled projection beyond the face of the wall allowed?

The maximum corbelled projection beyond the face of the wall that is permitted is one half of the wall thickness. This provision is crucial for maintaining the structural integrity of the wall while allowing some architectural design elements like corbelling. A corbel is a structural feature that supports an overhanging element, such as a beam or a roof. If the projection extends too far, it could compromise the stability of the wall by creating an imbalance and potentially leading to failure.

Building codes, including the North Carolina Residential Code, set these limits to ensure safety and to provide guidelines that builders must follow. Allowing a projection that exceeds one half of the wall thickness might result in excessive loading conditions that the wall may not withstand over time, particularly under the influence of various loads such as wind, snow, and other environmental factors. By restricting the projection to this specific measurement, the code helps ensure that corbelled features can be effectively integrated into the structure without jeopardizing overall safety and durability.