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Waste Line Through Joist

 
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Old 08-26-2018, 06:42 AM   #1
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Waste Line Through Joist


Writing a proposal for a bathroom remodel this morning, and I have a question for my plumber, but he won't answer his phone on Sunday.

Will he be able to run a 3" toilet waste line through 2x8 pine floor joists with no other penetrations in them?

We need to significantly move the toilet for this room to work.

He handles 95% of our plumbing needs so I have no idea what codes govern the size cutouts you can make in what joists.
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Old 08-26-2018, 07:03 AM   #2
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Re: Waste Line Through Joist


D/3. So no. You could look into these
https://www.metwood.com/cold-formed-...rcers%E2%84%A2

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Last edited by ksc1; 08-26-2018 at 07:11 AM.
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Old 08-26-2018, 08:24 AM   #3
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Re: Waste Line Through Joist


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Originally Posted by ksc1 View Post
D/3. So no. You could look into these
https://www.metwood.com/cold-formed-...rcers%E2%84%A2
I don't know what D/3 means, but I believe you fellas.

Those brackets are swifty as hell. I'm going to go ahead and bang out the quote now, and I'll send that link to my plumber, although I would hope he knows about that kind of thing already. Thanks.
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Old 08-26-2018, 08:30 AM   #4
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Re: Waste Line Through Joist


Quote:
Originally Posted by onmywayup View Post
I don't know what D/3 means, but I believe you fellas.
Depth of joist divided by 3.

7-1/4”/3=2-7/16” A 3” drain line requires a 3-3/4” hole.

Other factors come into play, but this is a good starting guideline.

Tom
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Old 08-26-2018, 08:55 AM   #5
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Re: Waste Line Through Joist


It might be faster and cheaper to head off those joists to run the plumbing. I think those brackets are custom made.

This is good to memorize, and give a copy to your plumber.
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Waste line through joist-8418d1168887083-proper-notching-floor-joist-notching-small-.jpg  
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Old 09-03-2018, 06:08 AM   #6
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Re: Waste Line Through Joist


I’m late to the party, on this one.

The 1/3 rule mentioned above, is correct and what I’ve seen inspectors use.
As to the option, I would check with the building inspector, first.



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Old 09-05-2018, 12:45 AM   #7
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Re: Waste Line Through Joist


posted wrong place

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Last edited by developernj; 09-05-2018 at 12:46 AM. Reason: posted inccorectly
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