I missed meeting you; sorry about your dog. Will you return soon?
The very rocky ground protected by a 3' over hang, adding still more rock beneath beneath the plates, and making sure any surface water
flows away from the plates will result in a drier piece of wood
then one buried in a hole. I could've placed my upright members on large stone but that would require more tractor
time than I want to spend.
I am not certain of all of Jeremy's plans
. I know he put in a rubble trench foundation.
My bracing will be of the classic V variety. You can see from the plate I've placed uprights every six feet (which is appropiate given their 5 to 7" diameters). Addtionally, there will be two lofts and a two foot shelf at 7' off the ground (done correctly, these will further lock the uprights together).
I see I didn't anwer your inner plates question initially. If you notice the north and south plates have side notches in the middle. The side notches is where I will place an inner plate but that inner plate is for my floor which will tie the plates together east to west.
If the ground sinks, I jack up the plate and insert a rock as needed.