Ihome owner wants to build a circular fire pit on outdoor patio. the patient will be surrounded by a brick ledge. the diameter of the pit must be at least 16 inches. the leg must have a width of 2 inches which is the width of each i home owner wants to build a circular fire pit outdoor patio. it will be surrounded by a brick ledge. the diameter of the spit must be at least 16 inches. i have a with 2 inches which is the width of each brick. the maximum area for the pit and the width of each break. the maximum area for the pit and the ledge is 2826 in.²