first of all, did you get a SI report for your site prior to your construction of foundation. this is dirt cheap to get and certainly helps you the hassle of differential settlement in the long run.

I think your pile qty a bit too much. frm the SI, we can know if your soil is strong enough. A raft foundation will do or combination with shallow pile which should cost a lot less with more provision for future upgrading...say 3 sty

Just my 2 cents.

Anyway, gr8 sharing here...keep it up. can't wait to see the end picture.

This post has been edited by Vip3R: Nov 27 2014, 02:31 PM