Building the Wood Fired Pizza Oven – Laying out the material
With a stack of flattened stainless steel sheets my next task was to figure out dimensions for the pizza oven.
I started with dimensions for the commercial units I liked which was 27″ x 27″ for the interior dimension. Recall that as an insulated stainless steel unit there is both an inner and outer. shell.
The standard fire bricks I am using are 9″ x 4 1/2″. So three bricks placed long way wide gives 27″ and six bricks deep makes 27″.
To get a handle on what I could accomplish using the materials at hand I labeled each piece of stainless steel and measured them up and then set about with a pencil and pad of paper figuring out designs.
The oven shape is simple enough- half circles. The formula for the circumference of a circle is 2 x 3.14 x radius, so the half circle shape amounted to half that or 3.14 x radius.
So, long story short, the material I had to work with dictated that the inner shell have a diameter of 27″ wide by 22 1/2″ deep.
The outer shell would have a radius 3″ greater to provide a gap for insulation between the inner and outer shell.
To make layout work a bit easier I grabbed a piece of 3/4″ thick plywood to make a master pattern with. To draw the half circle I picked a piece of aluminum flat from my scrap pile and drilled a bunch of 1/8″ holes in it. The first near the end would serve as the pivot point – when placed over a finishing nail tapped into the plywood – and other holes were drilled 13.5″ and 16.5″ further out from this point – the inner and outer curves respectively.
I used a jigsaw to cut the plywood curve out. This then served as the template for laying out the back inner wall, the back outer wall, and the front curved piece. One thing to take not of is that I marked out the initial curve described by the template but then added another inch to use to make tabs to bend over to provide additional structural support as well as give a place to spot weld the backs and fronts to the flat outer pieces…
Stay tuned for the next steps as we work towards a really cool pizza oven made from stainless steel scrap.