How deep can a non-load bearing stud be notched?

A non-load bearing stud can be notched to a depth of one-third of its overall depth. This guideline is in place to ensure the structural integrity of the stud is maintained while allowing for the necessary adjustments in construction for electrical or plumbing purposes.

Notching beyond this limit, such as half or two-thirds of the stud, can significantly weaken it, potentially leading to issues such as buckling or failure under lateral loads or other construction stresses. Therefore, following this one-third rule helps to balance the need for modification with the need for strength, ensuring that the non-load bearing wall continues to perform its necessary functions during and after construction.