How much can be notched from a non-load bearing stud without compromising its structural integrity?

When it comes to notching non-load bearing studs, the general guideline is that up to 40% of the width of the stud can be notched without compromising its structural integrity. Non-load bearing studs are designed primarily to support wall coverings and do not carry significant loads, allowing for additional flexibility in alterations such as notching.

Notching beyond this allowable percentage may introduce weaknesses that could affect the overall stability and durability of the wall assembly. In comparison, notching options that suggest lower percentages would still be acceptable but more conservative than the maximum threshold. Hence, the choice that specifies 40% is accurate, as it aligns with the accepted construction practices regarding non-load bearing walls.