There are two alternative ways of computing, just one relies on the understanding of the area of the walls, and the 2nd quantity. It is 3 inches thich with thin rebar via it which is supported on joists 18 inches aside. I selected it because it was pretty very easy https://aac-bricks-plant-cost92355.bloggadores.com/28348931/not-known-details-about-aac-bricks-plant-cost