Bar-B-Q Block

7 pieces per course are required, forming an inside diameter of 24 inches, and an outside diameter of 34 inches. A flat, level ground that is about 36″ x 36″ is an ideal base. If using multiple layers, it is recommended that you use only 6 pieces in the base layer to provide an opening to remove ash build-up and create a draft. For additional strength, the Bar-B-Q block can be mortared together.