Why I Oughta...

Last week, I showed the final form of the raised hearth - after I stripped the concrete-pouring forms from the four sides and talked about how I can now move-on to actual oven building.    For me, that started with creating a template out of Masonite.  I bought an 8x4' sheet and created a little circle-drawing jig that I cabbage'd together out of spare parts I had on hand.  The sheet is just 48" wide and after thinking about it, I've decided to make a 40" oven (interior diameter), which means the outside footprint diameter is 49".  That meant that I'm going to be a half-inch shy on either side.  That's ok.   I also needed to figure out where the dome meets the inner arch.  I started by attaching the circle-drawing-jig to the center of the board and drew out a 40" and 49" circle.  Then, I started to think about my arch sizes and how the inner/outer arch differ.  I chose to go with a 20-1/8th" inner arch width.   That meant...