We got our introduction to wood ovens from the one in the house we bought. The previous owner included a Mugnaini oven in the remodel they did to our home in Omaha Nebraska. It is cast rather than brick. I have seen them in backyards before but never inside. After several years of experimenting and learning we decided to build one at our cabin near Castana Iowa. We spent the winter studying the plans and posts on this site deciding what would work best for our build. Through discussions at the office we heard of someone else in Omaha who was in the process of building an oven and contacted him to get more info. Lars has many posts here and was a good resource. We decided to use 4x6 posts for support and 2x6's joists to support the 1st 4" concrete pad with rebar reinforcement. Next a layer of vermiculite concrete to rest the firebrick floor on. We used fireclay to level the bricks which may not have been necessary but if nothing else gave them a consistent base.