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-   -   max hole size on 2x4 top and bottom plate (http://www.diychatroom.com/f19/max-hole-size-2x4-top-bottom-plate-139687/)

 BlueBSH 04-08-2012 03:04 PM

max hole size on 2x4 top and bottom plate

I need to run some DWV vent through 2x4 walls that are non-load bearing walls.. what is the max hole size for this situation? just trying to figure out if i can retro fit 1 1/2 or 2" PVC vertically through that space...thanks!

 TarheelTerp 04-08-2012 03:42 PM

Quote:
 Originally Posted by BlueBSH (Post 894562) I need to run some DWV vent through 2x4 walls that are non-load bearing walls.. what is the max hole size for this situation? just trying to figure out if i can retro fit 1 1/2 or 2" PVC vertically through that space...thanks!
Quote:
 Originally Posted by IPC F101.3 Bored holes. A hole not greater in diameter than 40 per-cent of the stud width is permitted to be bored in any wood stud. Bored holes not greater than 60 percent of the width of the stud is permitted in non-bearing partitions or in any wall where each bored stud is doubled, provided not more than two such successive doubled studs are so bored. In no case shall the edge of the bored hole be nearer than 0.625 inch (15.9 mm) to the edge of the stud. Bored holes shall not be located at the same section of stud as a cut or notch.
3.5 x 60% = 2.1"
3.5 x 40% = 1.4"

 sublime2 04-08-2012 03:50 PM

Looks like your good to go!

 bcgfdc3 04-08-2012 05:20 PM

Just a question. The 60%/40% is that for vertical studs? I beleive the OP is boring the top plate and bottom plate. Could you completely bore the top and bottom plate in a non load bearing wall?

 BlueBSH 04-08-2012 05:40 PM

Quote:
 Originally Posted by bcgfdc3 (Post 894629) Just a question. The 60%/40% is that for vertical studs? I beleive the OP is boring the top plate and bottom plate. Could you completely bore the top and bottom plate in a non load bearing wall?
thats actually one of the reasons i was asking.. ive seen examples online where they cut the plates out completely and just put nail guards across.. but wasn't sure if that is allowed now or not

 sublime2 04-08-2012 06:09 PM

The calculation applys be it vertical or horizontal. Metal plates are recommended .

 ratherbefishing 04-08-2012 07:01 PM

If it wasn't allowed, how would any bathrooms be vented?

 AndyGump 04-08-2012 11:19 PM

1 Attachment(s)
This should help.

Taken from the 2009 IRC.

Andy.

 psilva8 04-09-2012 01:14 PM

Assuming the framing is done correctly, it is not uncommon to see a section of top or bottom plate completely cut out even in a load bearing wall. Happens all the time.

 BlueBSH 04-09-2012 02:42 PM

Quote:
 Originally Posted by AndyGump (Post 894858) This should help. Taken from the 2009 IRC. Andy.

so... this is allowed if im reading the picture right as long as its strapped and fireblocked

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