I was wanting to get some thoughts on the feasibility of building a cabin with flat decked roofing area, using standard c16 lumber. I don't know if I can get away with it on concrete blocks with a bunch of hardcore beneath, which would be fine for a single story, or if I'd have to our loads of concrete foundations to not kill a bunch of people. the roof area would be 3x6 meters, if that's of any use. Any thoughts or advice?