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Posted by marson on October 23, 2006, 10:43 pm
If hot dipped galvanized fasteners are needed in nailing into the
bottom plate if it's ACQ treated lumber, then there are a lot of
builders out there in trouble. I don't know of anyone who is doing
that, and i've never seen that spec on a plan. You just try to get a
framer to dig out his galvy hand bangers to nail off the bottom plate.
It just isn't happening.
I use treated bottom plates as I said before, but I do think it's
overkill. if you have enough moisture in your slab to rot your bottom
plate on an interior partition, then what about your drywall, not to
mention your finish floor coverings? Plus, I have taken apart numerous
buildings that had good old white wood against concrete that were
fine--including my own seventy year old house which not only has
untreated mud sills but has concrete poured between the joists.
RicodJour wrote:
> Bob Morrison wrote:
> > In a previous post marson wrote...
> > > does anyone know if the irc requires treated bottom plates on partition
> > > walls on a slab on grade house? is it acceptable to use white wood
> > > with a capillary break such as tarpaper on the bottom?
> > >
> >
> > The relevant section is IRC2003 R319.1. This section allows the use of
> > untreated sill plates and sleepers if the wood is separated from the
> > concrete by an impervious moisture barrier.
> >
> > However, it seems to me that the cost of using treated plates in this
> > instance is pretty nominal so why not go ahead and use them? I would
> > think you would spend more horsing around with the "tar paper" than it's
> > worth.
>
> Do you specify fasteners that won't corrode at an accelerated rate in
> the ACQ? The metal connector tie downs and the hanger nails are
> corrosion resistant with ACQ already, but the sheathing and stud/plate
> fasteners should also be specified resistant. The shear walls are of
> particular concern.
>
> R
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