by remy » Sat Nov 16, 2013 3:26 pm
The footing for the interior bearing wall should be right up under the slab.
I think you're allotting too much space for the 1st floor plenum. It looks like you brought the non-rated partition 6 inches past the finished ceiling, and then you left another 8 inches for the lights. But this space should be shared.
The second floor joists sit a little too deep into the bearing walls. 4 inches is the suggested amount.