Rebar Holes

You will now "stick a ring" of vertical rebar lengths around the perimeter of the trench (either 18" or 24" apart: equal distance spacing, even numbers opposite-spacing), placing these "sticks" 3" inside the outer rim of the trench. This ring of vertical rebar "sticks" will, thus, circle the inside of the circular trench, 3" in from the outer rim. However, a gap will be left of 2 ½ to 3 feet, somewhere on the perimeter, which will serve as the future door. On either side of the "door gap" place a tight triangle of vertical rebars (3) spaced 6" apart.

Note: these will be long lengths of rebar, so pilot holes can be driven by taking a pipe of the same diameter, or slightly more, of about 4 foot length and starting the holes by driving pipe into the ground the same depth and removing it. You will then be able to insert the long rebars more easily. The lengths of the rebars must be long enough to extend into the ground below footing level deep-enough to hold them vertical, plus enough uniform length for bending along height-equivalent of dome wall to overlap one foot with adjoining rebar on opposite end. When you are done with this phase, you will see a ring of rebar "sticks" sticking up vertical from around the inside of the circular trench, with the exception of the future door area.