Drew out my plans. I FOUND A SOURCE OF FIRE BRICKS here on Oahu thru Craigslist. Just a $1 per 6"x12" red clay bricks about 4 inches thick!!! Very cool...
So the middle drawing is the layout of my hearth oven floor. It will be 30 inches deep i.e. 2 and 1/2 bricks and about 32 inches wide i.e. 4 each of those bricks laid lengthwise.
The bottom drawing (also looking downwards) is the layout of the hollow tile (6"x8"x16" size). There will be five courses (rows) of hollow tiles which comes out to 40 inches tall wall. I plan to cut some cement board (wonderboard) to span the U shaped hollow time to surface and then place some cut up rebar laying down on the wonderboard and then pouring cement all over it creating a strong reinforced concrete table top.
Initial Purchase from City Mill:
Hollow Tile 6x8x16 Knockout, 16 each @$1.57
Hollow Tile 6x8x16, 22 each @$1.67
Hollow Tile 6x8x8, 4 each @$1.17
Wonderboard 1/2 inch $12.67
Motar Mix Quikcrete 60lbs. $8.87
Rock Gravel 3/4inch 1/2 cubic feet, 3 each @$6.69
Rebar 3/8 inch roundcut 10 feet, 2 each @$5.59
Total with Hawaii excise tax $124.96
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