How To Lay Footings For A Wall. So you must keep this in mind when drawing your walls. Instead they are formed on top of a trench filled with compacted sand or gravel base that allows water to wick away from the bottom of the wall.
The third step for your diy retaining wall is to prepare for footing!
Learn about different footing types including footing forms, belled base footings and buried support posts. Basically asking for a mess. Without reinforcement, codes say the thickness of the footing if the same was to be held true for a post frame building, the maximum diameter of an eight inch thick concrete pad, under a nominal six. The footing of a block wall provides a solid base for the blocks and reinforcement for the steel rods that reach up through the wall.