OT : well maybe not

Question has to do with wood -- more of the house / structural variety. Seems there are a few carpenters around here, thought this might be an easy question.....
I am working on relocating my kitchen to another part of my house. I mis read the structure of an non load bearing wall (I thought there was going to be a 3x(2x12) header -- yeah I know, why would I think so for a non-load bearing wall......) anyway my original plan was to reframe the wall with 2x6's to provide a channel to get around the header for the 1.5" vent pipe for the kitchen drain
Ok so I find out after some demolition that the 3x(2x12) header is actually a box framed with 2x4's covered with the same 1x12 material that on an adjoining wall is covering the 3x(2x12) beam.
So here is the question. Can a plumber cut a 1.5" hole in the top plate of a nonload bearing (gable end) exterior 2x4 stud wall to run the vent pipe ? As I am doing the framing and my plumber is doing the plumbing and seeing that it is after COB on friday I'd hate to loose the weekend waiting to get the answer from him.
I have several resources on framing construction, but non on plumbing -- if there were any references on the web that would be greate as well.
for reference I live in Maryland
Now the real question is where did I put the receipt for the 25 2x6's that I have to exchange for 25 2x4's.......
TIA Eric
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In NC, you can put a 2 X8 on top of the wall (fastened), then drill through the plates and the nailer. -- Jim in NC--
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eric wrote:

your house will fall down anytime soon...since now it's a unit comprised of framing material, insulation, interior drywall/plaster, exterior siding/stucco/whatever. Have at it. cg
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If all he is using is a 3 inch pipe (max.) then yes. As a matter of fact it is done on load bearing walls too. Plumber guy should be able to help you if there are any code considerations (otherwise maybe he isn't the plumber you want)
--
Young Carpenter

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