Step 6Create brace forms and upper countertop form
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create a form for the upper countertop. because it overhangs the barbecue by a few feet, it is a good idea to brace it. this may be slight overkill, but better safe than ssorry. create brace forms out of wood, we made 3. attach them to the side of the barbecue and pour them first. make sure to add rebar to them before they dry. these braces will stick up through the bottom of the countertop form. create that form from wood . ours overhangs by about a foot. make sure this is very well supported and contains rebar.