Notching a load-bearing stud: what is the maximum allowed percentage?

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Multiple Choice

Notching a load-bearing stud: what is the maximum allowed percentage?

Explanation:
Notching a load-bearing stud weakens the member, so the allowable removal is tightly limited. The maximum notch for a load-bearing stud is 25% of the stud’s width. For a common 3.5-inch-wide stud (a typical 2x4), that translates to a notch no deeper than about 0.875 inches. Holes bored in studs have a different limit (up to 40% of the width) and are not the same as notches, which is why that option isn’t the correct context here. So the correct limit is 25%.

Notching a load-bearing stud weakens the member, so the allowable removal is tightly limited. The maximum notch for a load-bearing stud is 25% of the stud’s width. For a common 3.5-inch-wide stud (a typical 2x4), that translates to a notch no deeper than about 0.875 inches. Holes bored in studs have a different limit (up to 40% of the width) and are not the same as notches, which is why that option isn’t the correct context here. So the correct limit is 25%.

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