Step 2Dig a Hole
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We dug a hole 2 feet wider than the fire pit--about 7 feet across. Make the hole round by hammering a stake into the center of your fire pit area. Loop a 3 1/2-inch length of string over the stake and mark the circle. Dig out 12 inches of soil. Shovel in 4 inches of gravel and 4 inches of sand. Tamp that layer flat. Onto that base lay down the base course of blocks. Make sure this course is level in all directions. Fill the space outside the blocks with gravel. This nearly buries the first course, making the stone base strong.
Seriously it's a nice project and I'm planning on building one when I move which isn't too far away.
Can you use charcoal instead of wood? That way it would make an awesome charcoal grill and if I could find a cover, a smoker as well