Im working on a 2 story addition that is resting on 6x6 posts. Unfortunately due to timing I was unable to work out pouring a slab prior to our contractor begining our addition project and pouring the footings. So now I am left with a challenge I am over analyzing :).
Originally I wanted to put a 20'x10' slab or floating deck below the entire addition pictured, however because each footing is only 30" deep a single slab would require excavating below the footings on the left side of the photos.
As an alternative I'm thinking about a 2 tier slab or even a floating deck as pictured, but I am worried about undermining the posts either by surounding them in concrete or by digging too far down against the footings.
What would you do in this situation? The space will be unfinished and mostly used for storage.