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Old 06-15-2008, 09:51 PM   #1
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Drill through base studs


I really don't know the proper terminology. I'm referring to the base studs at the bottom that attach to the foundation (slab). It is just two pressure treated 2x4's at the bottom of the frame. I need to run a drain for my water heater pan. Is there any problem just drilling through the studs? I can also build a small platform to set the water heater on and run it above.

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Old 06-15-2008, 11:08 PM   #2
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Drill through base studs


I think you're talking about the bottom plate(s) of your wall. Studs are vertical, plates are horizontal.

You can drill plates up to 50% of their diameter without doing additional reinforcement to restore their structural integrity.

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Old 06-15-2008, 11:09 PM   #3
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Drill through base studs


You can drill load bearing studs to 40% of their width if the hole is centered. Avoid it if you can!
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Old 06-16-2008, 05:45 AM   #4
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Drill through base studs


your talking about drilling a 7/8" - 1" drain hole through the side of the plate out the 3-1/2" ??? you will be fine . I suppose your going to run pipe through the hole correct?
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Old 06-16-2008, 09:16 AM   #5
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Drill through base studs


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Originally Posted by buletbob View Post
your talking about drilling a 7/8" - 1" drain hole through the side of the plate out the 3-1/2" ??? you will be fine . I suppose your going to run pipe through the hole correct?
Yes, it will be a 1" hole through two 2x4's (3"). The hole is for the 1" pipe for the drain. I can also just build a small stand to sit it on. I just don't know if that would look weird. If I sell the house, would an inspector frown upon drilling through the plates?

Last edited by navysuit; 06-16-2008 at 09:20 AM.
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Old 06-16-2008, 04:19 PM   #6
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Drill through base studs


I would not think so. As long as your in a beam space. I would think that you will be drilling between the lower and the upper plates because the drill chuck laying on the floor will usually bring you in that area anyway. unless your drilling at an angle. Just watch out for nails and foundation anchor bolts. just something that might pop up when drilling.


Last edited by buletbob; 06-16-2008 at 04:26 PM.
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