Framing & StructuralQuestion 312 of 700
For a bored hole in an EXTERIOR bearing-wall stud, what is the MAXIMUM hole diameter as a fraction of the stud depth, and how close may it come to the stud edge?
a.25 percent, 1/4 inch from the edge
b.60 percent, no edge limit
c.40 percent, with at least 5/8 inch of wood between the hole edge and the stud edge
d.50 percent, flush with the edge
Explanation
A bored hole in a bearing-wall stud may be up to 40 percent of the stud depth and must leave at least 5/8 inch of solid wood between the hole and the edge of the stud. The 25 percent figure is the notch limit, 60 percent applies to non-bearing studs, and holes may never be flush with the edge.
Law Reference: 2025 CA Residential Code §R602.6Practice all 700 questions free — no signup required.
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