I get the sonotubes for the deck posts, it's the ones in white that are right next to each other, and inside your foundation, that I don't understand?The two rows of sono tubes are for a deck off the back of the house. Tubes in the front of the house/side of the garage are for pillars on the porch. I was going to pour the deck pads months from now, but just decided to have it all pumped at the same time and save on labor.
60 years ago, while still only a Civil Engineering student, but working a Summer job, I designed a concrete beam foundation set on creosoted oak pilings (driven into swampy wet material).Thank you. I grew up in the SF East Bay and every house I ever worked on, or knew of, was pier and beam. I never saw a slab foundation until I moved to Texas. But the older houses here are Pier and Beam, and they have the most foundation issues. Nothing wrong with Pier and Beam, but they didn't put the footings deep enough to handle the movement of the soil. Most are just brick on top of some concrete.
I'm looking forward to seeing pictures of how your pier and beam works. It's just very odd to me to see them right next to each other like that.