Size the trench so there's enough room for the retaining wall block and at least 8 in. of space behind it. Excavate deep enough to completely bury at least one full course, including space for 6 to 8 ...

In this video I show and explain how I built my fire pit from retaining wall blocks with a galvanised round garden bed for the inner rim. I will be using our fire pit to cook with eg spit roast our ...