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Hi guys,

I have to run a 3" toilet PVC drain pipe through a 2x8 floor joist. I know that the biggest hole you can drill through a 2x8 is 2 3/8" but I have no other option but to go through this joist. Is there any way I can scab the joist?

Thanks,

Pat
 

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Pluming or carpentry are better forums for this thread.

There are a variety of ways to repair this, some would take an engineers approval
 

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Moved.
Need more info such as span, # of joists drilled, pipe layout, etc
 

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The proper way to do it is to add double headers on each side of the pipe to to the 2 adjacent joists. Technically they should probably be doubled bit I seen a lot of them that aren't. Add the framing before you drill the hole and use joist hangers.
 
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