We're getting ready to build a 65×30 metal addition, 11' in height. I'm about to start building the grade up but I need 75% of it to rise 24". I know I'm going to need roughly 18 trucks of road base, I know to build 6" and compact until where I need to be.
Where I'm struggling, is I'm assuming the footing will be 24"x24" all the way around the perimeter(haven't had concrete contractor verify this yet) It seems dumb to build up the entire pad and then dig my rock back out, is here a way to build the grade up around a 24"x24" cavity? Bags of some sort maybe? Any ideas?