Here’s a better look at it.
[FONT=Verdana]The issue is this: is the stud notched OR bored? If it’s a notch, it cannot exceed 25% of the stud depth. The opening clearly exceeds 25% so a code violation exists. If it’s a bored/drilled hole, it cannot be within 5/8" of the end of the stud and it clearly is withing 5/8" so a code violation exists. **Either way, whether drilled or notched, the opening is not compliant in my opinion. **[/FONT]
[FONT=Verdana]2006 IRC R602.6 Drilling and notching–studs. Drilling and notching of studs shall be in accordance with the following: [/FONT]
[FONT=Verdana]1. Notching. Any stud in an exterior wall or bearing partition may be cut or notched to a depth not exceeding 25 percent of its width.[/FONT][FONT=Verdana]
[FONT=Verdana]2. Drilling. Any stud may be bored or drilled, provided that the diameter of the resulting hole is no more than 60 percent of the stud width, the edge of the hole is no more than 5/8 inch (16 mm) to the edge of the stud, and the hole is not located in the same section as a cut or notch. Studs located in exterior walls or bearing partitions drilled over 40 percent and up to 60 percent shall also be doubled with no more than two successive doubled studs bored. [/FONT]