Yes, these are joist pockets for drop-in joists (6x8s). The 8x12 would be considered wall girts.
I probably could've done a better job of illustrating that. :rolleyes:
And yes, the 1" deep pocket would seem shallow if it weren't for the straps of metal on top(Simpson Strong Ties) keeping the joists from sliding/shrinking/dropping out of the pocket. Oh, I can just hear the purists now...
The main jist of my question is about the wood directly under the pocket where there is more direct force.
If the grain of the wood goes (more or less) vertically, like this:
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Is the strength characteristic different than when the grain runs horizontally?
Like this:
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