Burn out remaining steel beams and 4" lolly columns" of existing decking. Start digging for removal of existing footings for the "lolly columns". Architect is allowing existing 4" x 4" wood posts in cellar fire corridor to remain. Two layers of 5/8" sheetrock will be applied on either side of 15/8" x 20 gauge metal studs, to maintain our required 2 hour fire rating for the backyard fire egress to the street, with a minimum width of 44".
