The first thing I see is that you have several points where there are many timbers jointing the interior posts. This joint is going to be hard to execute.
Which way are your floor joists running? Gable to gable or wall to wall?
Whichever way, lower the supporting member by the height of the joists and run them over the supporting member and you'll eliminate this complex four way joint, as well as others.
Just my thoughts about your design, others may have more input.
Jim Rogers
