The ground level installed IFCW™ dimensions are 90' x 4', or 360 square feet. Note that the "dry side" thrust shoe at the base of the parting support is there to resist load. For IFCW™ up to 4' in height this support method is utilized. Plank lengths are 10', thus intermediate vertical supports are not needed. "Wet side" concrete footing and sill plate are landscaped to lawn level.