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DIY Pizza Oven Foundation Slab - Rebar and Reinforcement - May 2024

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Last week, I ran through the details of the final dimensions of our backyard wood-fired pizza oven including the reinforced slab, the block stand and the insulated hearth.  I had been thinking of a 39" diameter oven and after looking through the actual dimensions of the block stand (less than 16" per block), I've settled on these final dimensions: Reinforced foundation slab: 72" wide x 80" deep. Stand: 4 blocks wide x 4.5 blocks deep - 62.5" wide x 70.312" deep. Hearth: Same as stand.  Framed with 2x6 dimensional lumber. Oven: 39" interior, 51" exterior side-to-side x 64" front-to-back. The first major task is to pour the foundation slab.  The steps to get that done include: Excavate the site Lay down 1/2" gravel and compact the base Think about drainage on/around the foundation slab  Set up the forms and stake them level and square Buy the material (concrete, rebar, cinder blocks, angle iron) Lay down a 6 mil vapor barrier In