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2012 IRC Section 302 Fire-Resistant Construction

T-Bird

T-Bird

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Joined
May 7, 2013
Messages
95
Location
Seattle
R302.2 Townhouses

Section 302.2.2.1 Continuity. The fire-resistance-rated wall or assembly separating townhouses shall be continuous from the foundation to the underside for the roof sheathing, deck or slab.

If I have an intervening floor assembly what do I need to provide this continuity?

And what about floors over crawlspaces?

I am inclined to show either 3" min. solid rim or blocking or provide a layer of 5/8 type "x" gwb protection at a single 2x rim or blocking.

I eagerly wait to hear from you.
 
I would check with the AHJ, see if they will accept it.

We see a lot of 2 hr shaft walls, solves the problem.
 
Townhouses can have a common 2-hour wall or two separate one hour walls. What the IRC is describing is a party wall (for a common wall).
 
Shaft liner from foundation to sheathing then frt plywood is most common here (no parapet)
 
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