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Re: Plywood rigid diaphragms

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>How about cutting the sill plate so that the post with the holdown bears
>directly on the slab. On the second floor, cut the sill plate and dbl top
>plate,

The top plates are normally the chords, you would introduce new hardware for
that chord splice.

>OR..... How about asking Simpson or any other hardware company to come up
with
>a holdown anchor/nut/bolt assembly that selfs tighten as wood shrinks.
Maybe a
>friction type nut that works one direction only and as the wood shrinks,
the
>nut moves down on the anchor bolt but is restrained from moving upward.


There are at least three companies that make self tightening hardware. Two
of them were at the seminar that started this thread. Simpson has a good
hold (no pun intended) on the market availability. These companies claim
their products are competitive with Simpson, however, there is a learning
curve for both the engineer and the builder.

Jeff Smith