What is the maximum percentage of depth that a non-load bearing stud may be notched?

The maximum percentage of depth that a non-load bearing stud may be notched is indeed 40%. This regulation is set to ensure that the structural integrity of the stud is maintained while allowing for the necessary modifications during construction. Non-load bearing studs, which are used mainly to support wall coverings and not structural loads, can accommodate notches to facilitate the installation of wiring, plumbing, and other elements that pass through the walls.

Permitting a notch up to 40% helps prevent potential weakening of the stud, which could compromise the stability of the wall. Notching beyond this limit could lead to failure risks, such as buckling or insufficient support for the wall assembly. Therefore, adhering to this 40% guideline preserves both the functionality and safety of the building structure while allowing enough flexibility for necessary installations.