Take the 2-minute tour ×
Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. It's 100% free, no registration required.

This question have a great answer with all the guidelines for drilling holes in joists.

The question: Are the guidelines the same for band joists?

A bit of context: I'd like to add an exterior outlet for my central vaccuum cleaner and the shortest path is through the band joist. But I'm not sure if I can drill a 2 1/2" hole in a 7" band joist.

If the guidlines applies (and are not more restrictive either), the maximum hole size would be 2 1/3 inches. I can get by with a smaller hole, but I'd have to get another hole drill bit.

share|improve this question
2  
Are you going to vacuum your lawn with the central vac? –  BMitch Oct 3 '12 at 15:41
    
Be sure to protect the outlet well. In my area some homes recently burned down because, during a brushfire, the central-vac outlet melted... causing hot embers to be sucked into the house. –  Matthew Oct 3 '12 at 15:52
1  
BMitch: Haha! It's only to clean the cars' interiors actually. That brings another question: is this a good idea? –  Danny T. Oct 3 '12 at 15:58
add comment

1 Answer

up vote 4 down vote accepted

No. Since the band (rim) joist is continuously supported by the foundation wall, the boring and notching rules do not apply. You will, however, want to use common sense. Try not to notch or bore directly under a window or door, especially right where the king/jack studs are. You also don't want to notch or bore the entire width of the joist, in other words don't remove a section of the rim joist.

You'll notice the rim joist is a common place for dryer vents, furnace vents, electrical service cables, and other utility openings. This is due to the lack of notching and boring guidelines, which accommodates the placing of such openings.

share|improve this answer
    
I agree with this answer. If you want a bit more strength, you could sister (attach a similar piece next to the existing one) a joist piece in the location where you plan on drilling the hole. –  Eric Gunnerson Aug 1 '13 at 3:40
add comment

protected by Niall C. Aug 1 '13 at 3:41

Thank you for your interest in this question. Because it has attracted low-quality answers, posting an answer now requires 10 reputation on this site.

Would you like to answer one of these unanswered questions instead?

Not the answer you're looking for? Browse other questions tagged or ask your own question.