This is my first endeavor into building an arch. Pans purchased off of craigslist, the front has dividers and the rear raised flue. Both were home built previously so I really don't know their specs. Built the arch to fit out of 2x2 3/16" angle and sheet steel for the skins. The arch is lined in concrete to save money over bricking and so far, so good after 3 test burns to play with the internal setup. On the 3rd burn I was able to get both pans boiling with little effort. I did make it possible to add a blower in the rear and will consider once the season starts easily.