What percentage of their depth can wood studs be cut or notched in non-bearing partitions supporting no loads other than the weight of the partition?

When it comes to cutting or notching wood studs in non-bearing partitions, it is crucial to respect the structural integrity of the framing. For non-bearing partitions that carry no additional loads aside from their own weight, wood studs can be cut or notched up to 40% of their depth.

This allowance is based on construction standards that ensure sufficient support while still permitting flexibility for piping, electrical work, or other penetrations that might be necessary within the wall. Cutting or notching studs more than this percentage could compromise their strength and stability, potentially leading to issues such as warping or failure under certain conditions.

The other options represent lesser or greater percentages that do not align with the industry standards for safe practices in woodworking and framing. Therefore, knowing that the safe limit for notching or cutting is set at 40% helps ensure that partitions remain structurally sound while allowing necessary modifications.