My 30 x 40
I am getting all my ducks in a row to start my shop. I will be a 30 x 40 metal bulding with a 40 x 40 foundation. the foundation is what I have question about. It was to be 4" thick with #3 re bar 16 on center with perimeter beam with #5 re bar in the beams then 2 interior beams with #5 re bar also.
I just got back from the engineer who told me that the foundation is minimum for this bulding. This is what the builder said would be plenty. The engineer said I need to have Post-Tensioning foundation in stead of re bar.
Is this over kill or right on? Cost is an issue but should not be the only issue.