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How much wane is acceptable in stud grade lumber? Is there a risk of insect infestation if excessive waning exists? Is it proper to ask the builder to replace substandard studs during the framing step?
Your building department can give you a better guideline than we can. My guess is that anything more than 1/4 to 1/3 the total dimension reduction due to wane would be too much.
Thanks for the quick reply. In your experience, is their a risk of insect infestation with exposed bark versus a solid piece if lumber?