Greetings, I have a couple of questions for knowledgeable friends. 1-my raft foundation is on hard ground, but because the elevation is low on the other side of my building, a part of the foundation (30-35cm) is exposed. Is there any problem with this? (basic 80cm) 2- There is a shelter at the back of my building and I have columns 4 meters apart. I combined them with a 60 cm thick curtain. The control person in the municipality said that I should reduce the 4-meter column spacing to 2 meters. It would be better, is there a basis for this, Sounds like business to me.