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Holes in shearwall sheathing for Mechanical piping

Holes in shearwall sheathing for Mechanical piping

Holes in shearwall sheathing for Mechanical piping

(OP)
Hello,

I am trying to find some literature about taking some sort of shear reduction capacity if there are holes in the sheathing of the shear wall for mechanical units. Originally we were just going to have them block around the holes, but the mechanical piping veers vertically through the top plate so it is not always possible to do the blocking. Does anybody have any options to remedy this? Is there a capacity reduction required? Any links to literature would be appreciated. Thanks for your help.

RE: Holes in shearwall sheathing for Mechanical piping

If it cuts the top plate you may need to deeper studs, ie, a wider wall.

What is the diameter of the piping and the current stud size?

Mike McCann
MMC Engineering

RE: Holes in shearwall sheathing for Mechanical piping

(OP)
The holes are ~6" diameter and the current studs are 2x6.

RE: Holes in shearwall sheathing for Mechanical piping

You are going to go to either a 2X10 or 12X12 wall, or construct a mechanical chase.

A 6" diameter pipe will not even fit in a 2X6 wall... The mechanical is going to have to give a little here too to make this thing work.

Mike McCann
MMC Engineering

RE: Holes in shearwall sheathing for Mechanical piping

How often does the pipe go vertical through the wall? Can you get the required capacity if you treat the shearwall as individual segments between the vert pipes?

RE: Holes in shearwall sheathing for Mechanical piping

I remember the Wood Design Manual 2010 issued be the Canadian Wood Council addressed shear capacity of walls with windows and doors by breaking them into separate parts like CANEIT mentioned. I recommend it as a resource.

RE: Holes in shearwall sheathing for Mechanical piping

That's true - another consideration would be to break the shear wall into smaller segments.

Mike McCann
MMC Engineering

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