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Step 5Stack Bricks to Make Arch, and Remove the Jig
Place the jig at the back end of the oven, against the wall. Put a thin (1/4" or less) shim under each leg.
Starting from the outside, add the bricks on their sides, moving inwards from each side. The middle brick (keystone) ended up fitting perfectly into place. Break one of the firebricks and use the shards in between the gaps to keep them from shifting and falling during the jig removal.
Once the arch is in place, you want to gently slide the shims out from underneath the legs. The jig will drop down and the bricks will settle a bit. At this point, you can gently pull the bottom of the jig towards you to slide it out from the bricks. If everything was done correctly, they should remain in place. I have never seen this not work, but still, do it gently.
Watch the attached video for a demonstration.
Once the first layer is done, repeat for two more - the arch ceiling is three brick lengths long.
Starting from the outside, add the bricks on their sides, moving inwards from each side. The middle brick (keystone) ended up fitting perfectly into place. Break one of the firebricks and use the shards in between the gaps to keep them from shifting and falling during the jig removal.
Once the arch is in place, you want to gently slide the shims out from underneath the legs. The jig will drop down and the bricks will settle a bit. At this point, you can gently pull the bottom of the jig towards you to slide it out from the bricks. If everything was done correctly, they should remain in place. I have never seen this not work, but still, do it gently.
Watch the attached video for a demonstration.
Once the first layer is done, repeat for two more - the arch ceiling is three brick lengths long.
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