What percentage of a wood stud's depth is allowed to be cut or notched in exterior walls and bearing partitions?

Cutting or notching wood studs is regulated to ensure the structural integrity of walls and partitions. According to building codes and standards, a maximum of 25% of a wood stud's depth may be cut or notched in exterior walls and bearing partitions. This guideline helps maintain adequate strength and load-bearing capacity.

When a stud is notched or cut beyond this limit, it could compromise the structural system, leading to potential failure under loads. The 25% limit is established to balance the need for adjustments and applications like electrical, plumbing, or ventilation work while still safeguarding the strength of the wall assembly.

In contrast, the other percentages provided would exceed the acceptable limits as per typical building codes, which are designed to prioritize safety and structural performance in construction practices. Thus, understanding these limits is essential for anyone involved in framing and wall construction.