i am trying to decide what to do for my foundation for my cabin i am building. the cabin is going to be 24x36 with around a 2/3 loft. i built a small 12x16 two story cabin when i first bought the land and i used treated 6x6's 4-5' deep.the cabin is shaky in the summer. the ground is mostly silty sand with little clay. there is no gravel within piling length. i have a good deal on telephone poles (free) or should i go with sauna tubes. i am putting in a root cellar probably the 24' width of the cabin by 8'. i was planning on using treated 2x8 12" on center and using treated plywood and bituthane to enclose the root cellar, not quite sure on that yet. i have an excavator thats why i am making the cellar so big and i plan on putting my battery bank and plumbing down there. i am looking for suggestions on the pilings and framing the cellar.