eliutbbIm sorry but this is not right, I know that Im going to sound rude, but if you want to avoid being in a world of pain and misery, I strongly sugest that you follow this advice:
“First of all, If you are not a structural engineer, you should not do this your self. Get a structrual engineer involved.”
It really pisses me off (this is where I get rude) when people take everything on their hands even when they are not completly sure of what they are doing. How do you know if the underground is solid? A lot of people just think that in order to make a foundation you just have pour and pour indiscrimante amounts of concrete, and that the more is the best, that is wrong in most cases, when the “friatic mantle” (is that the right translation?) is too high your trenches and foundations might float or sink.
Again Im sorry, and please dont take this personaly, but that is not professional behaviour.
I truly hope you sove your problem I’v been there.
Cheers!
Eliut