What grade must stud grade be for load-bearing walls?

For load-bearing walls, the grade of the studs is crucial to ensure structural integrity and safety. Studs that are graded at least #2 grade are typically specified for use in these applications. This grading level indicates that the lumber has been inspected and meets performance standards for strength, durability, and minimal defects.

Using #2 grade studs ensures that they can support the loads imposed upon them while maintaining the stability of the wall. Studs graded lower, such as #3 or other grades, may contain more knots, warping, or other imperfections, which could compromise the strength needed for load-bearing walls. Stud Standard or #1 grade, while suitable for some applications, do not necessarily ensure the same consistency in quality required for the rigorous demands placed on load-bearing components. Therefore, the requirement for at least #2 grade studs helps in constructing safe and reliable structures.