Originally Posted by DIY1
but I think I'll feel even better if I wedge in a little 3/4" treated peace of wood between the foundation and under the joist (between the sill plate and the interior of the house). Then it seems to me that the joist will be at (very close to) full strength.
If it gives you peace of mind, I say go for it.
But in reality, you won't be doing much to improve the "strength" of the joist. If you can get a piece of wood wedged snugly under the joist, you may
decrease its effective span by one or two inches, thus reducing the maximum bending moment slightly. But again, the only tangible benefit would be peace of mind for yourself.
Instead of cutting a small block to put under each joist, why not just get a sill plate that covers the entire top of the stem wall? Again, I don't think that doing that is necessary, but it would be easier than cutting little blocks for each joist.