I have a patio made up of 8'x8' slabs which are around 4" thick. I'm planning to install a patio cover and will have (3) posts on the edge of my patio. I'm curious what the best method is to put a footing under these slabs to meet code? Code calls for a 14" square footing, 12" thick. How would one put this under an existing patio slab?
Appreciate any input.