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Unread 01-17-2016, 10:54 AM   #1
wwhitney
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Wall framing

Quote:
Originally Posted by cx
The stud wall does not qualify as a support wall without adequate sheathing on at least one side or proper blocking between studs.
I wasn't aware that sheathing would be required, although I agree it is a good practice. Do you have a building code reference? I would think that if the wall is only designed for gravity loads, and isn't part of the lateral force resisting system, that it wouldn't need sheathing.

Cheers, Wayne
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Unread 01-17-2016, 11:01 AM   #2
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Because the unsheathed studs can (and will) bend in every direction independently. The sheathing and blocking greatly reduces the chances of that happening.

Quote:
R602.4 Interior load-bearing walls. Interior load-bearing walls shall be constructed, framed and fireblocked as specified for exterior walls.
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Unread 01-17-2016, 11:03 AM   #3
cx
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Don't have a code citation for you, Wayne, but it's not really lateral load in question here. It's the flexing of the individual studs when vertical load is applied that can be a problem in allowing the floor joists to deflect where no deflection at all is desired for the support. A 2x6 wall will do better than a 2x4 wall, of course, but both still require sheathing or blocking.

My opinion; worth price charged.
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Unread 01-17-2016, 11:53 AM   #4
wwhitney
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Thanks Paul and CX for the explanation, and thanks Paul for the code cite:
Quote:
R602.4 Interior load-bearing walls. Interior load-bearing walls shall be constructed, framed and fireblocked as specified for exterior walls.
I did see that part of the IRC, but I didn't see where unsheathed exterior walls require mid height blocking. I dimly recall a requirement that applies if the studs are over 10' or something like that.

But the upshot for the OP is that a tile installation will be improved by installing either sheathing or mid-height blocking on that supporting wall. At least under the joists that are supporting the area to be tiled.

Cheers,
Wayne
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