Framing the counter-top

before pouring the countertop I built a wood frame around the wall, and a sheet of wood under the counter. To allow for a coating on the blocks, I allowed for a 1/2" overlap of the counter-top. This required adding some strips of wood under the 2 x 8 planks that I used for the sides of the counter mold. The outside frame was supported by 4 legs and kept in place by 3 side supports. The sheet was supported by 6 legs, however Once pouring I noticed some bowing, so I added a couple of extra legs. If I were to redo this I would make a 2x4 frame to support the sheet with cross bars to prevent sagging. Once the frame was installed, a 12" x 12" grid of 1/2" rebar was added to reinforce the first layer of concrete (4").