unique situation (to me). Have existing slab with footer around perimeter. Its a 12 think approx. 2 ft tall footer around perimeter with backfill and conventional slab inside. problem is new building going on it and building columns location will not be directly over footer and will rest on slab. Its only a open wall building with no load bearing qualities other than combined mass. Here is rub; advice is to create a new beam on top of slab and bridging footer to support and anchor building columns. New beam would be approx. 18" wide and approx. 6-9" thick, doweled into existing. I cant find anything supporting this idea or for that matter refuting it. Any input would be helpful.