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Old 05-19-2009, 12:57 PM   #1
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Drilling holes through studs


Im adding a sub panel and need to run a 1 1/4" conduit. I would like to put the conduit in the wall but wondering what is the maximum size hole that I can drill through the studs. It would probably need to be drilled 1 1/2" size and have to drill about 6 studs. I can run it surface if needed but would like to put it inside the wall.

Whats the max size I can drill through the studs?

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Old 05-19-2009, 01:53 PM   #2
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If it's not a bearing wall, I wouldn't be concerned. You still have an inch on each side left.


Think about steel studs. They have 1bout 1 1/2 inch holes punched in them every couple feet.


Technically, I don't know the answer.

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Old 05-19-2009, 01:58 PM   #3
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If it's not a bearing wall, I wouldn't be concerned. You still have an inch on each side left.


Think about steel studs. They have 1bout 1 1/2 inch holes punched in them every couple feet.


Technically, I don't know the answer.
Thats exactly what I was thinking also, "technically" I dont know the answer either
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Old 05-19-2009, 02:31 PM   #4
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40% allowed in bearing walls and 60% allowed in non-bearing walls.

For a 2x4 this is 1-7/16" or 2-1/8"

Either way you will need nail plates on BOTH sides of every stud.
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Old 05-19-2009, 03:18 PM   #5
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40% allowed in bearing walls and 60% allowed in non-bearing walls.

For a 2x4 this is 1-7/16" or 2-1/8"
I believe you, so don't take this question the wrong way. Could you provide a code citation? This is really good information, and I would like to be able to tell people this and back it up. Thanks, sincerely.
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Old 05-19-2009, 04:52 PM   #6
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Look at wall framing here:

http://www.codecheck.com/cc/pg03_04building.html

Be safe, G
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Old 05-19-2009, 05:11 PM   #7
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I believe you, so don't take this question the wrong way. Could you provide a code citation? This is really good information, and I would like to be able to tell people this and back it up. Thanks, sincerely.
I have this Wood Boring Guide .pdf file. It is from:

Western Wood Products Association
522 SW Fifth Avenue Suite 400
Portland, OR 97204-2122
503/224-3930 Fax: 503/224-3934
e-mail: info@wwpa.org
web site: http://www.wwpa.org

I don't remember where I got it but you can try it here: http://www2.wwpa.org/Portals/9/docs/PDF/A11.pdf

I had to join their site to see if it was still available. It is but you may have to join (for free).
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Old 05-19-2009, 05:24 PM   #8
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Drilling holes through studs


Quote:
Originally Posted by Speedy Petey View Post
I have this Wood Boring Guide .pdf file. It is from:

Western Wood Products Association
522 SW Fifth Avenue Suite 400
Portland, OR 97204-2122
503/224-3930 Fax: 503/224-3934
e-mail: info@wwpa.org
web site: http://www.wwpa.org

I don't remember where I got it but you can try it here: http://www2.wwpa.org/Portals/9/docs/PDF/A11.pdf

I had to join their site to see if it was still available. It is but you may have to join (for free).
Thank you very much.
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Old 05-19-2009, 06:21 PM   #9
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Drilling holes through studs


Did the .pdf link work for you?
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Old 05-19-2009, 06:49 PM   #10
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Drilling holes through studs


Speedy, the pdf works. Very good info. Thanks.
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Old 05-19-2009, 06:49 PM   #11
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Did the .pdf link work for you?
Yes, it did. Very interesting reading. Thanks.
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Old 05-19-2009, 07:35 PM   #12
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Drilling holes through studs




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Old 05-19-2009, 07:53 PM   #13
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IRC R602.6
Same info. Perfect reference Michael. Thanks.
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Old 05-19-2009, 08:27 PM   #14
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Drilling holes through studs


Do you have a drawing like that for floor/ceiling joists?
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Old 05-20-2009, 05:39 AM   #15
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Do you have a drawing like that for floor/ceiling joists?
In that .pdf I linked above.

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