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36" build in Tallahassee - AKA Bruce's Folly

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  • #46
    Re: 36" build in Tallahassee - AKA Bruce's Folly

    Russell,
    Thanks for your joining in. Second point first, I probably haven't communicated this in my posts, but I am actually confident that I will be able to build a working oven. Might be false confidence, but it sure looks to me that as long as the dome supports itself and is insulated it will be functional. Still, I am hoping you and others in this community will share their hard earned expertise so that my list of things I would like to have done differently will be short. Looking at the setback that includes a 12" shelf made me wonder if the shelf was all that useful. The problem is that I won't know unless I build it and see if it makes sense. I put it into my initial plan because that seemed common in the builds on this site. As Dave keeps pointing out, this is my build and as you might guess from my stand, I may go my own way. At the same time, it was the feedback I received from my initial proposal (in retrospect not a good one) that led to a stand that I could build myself from my wheelchair and is still sufficiently solid.

    Having said all that, I suspect my dome will be fairly standard. I plan to at least try tapering the bricks to keep the joints tight on the inner surface, but if this proves too hard I will go with the 1/2 brick and lots of mortar approach.

    I skimmed your build, but couldn't tell the distance from the front of your shelf to the cooking surface. How useful has the front counter been and would you change your setback?

    Right now, I am leaning toward reducing the setback to 15" from the front edge of the stand to the inner opening. This would likely place the outer arch only a few inches back from the front edge.

    Again, thanks for the reply. I am fully convinced that this is one of the most consistently supportive communities on the web. Bruce
    Link to my build here:
    http://www.fornobravo.com/forum/f6/3...lly-19181.html

    Check out my pictures here:

    Selected pictures of the build.

    https://picasaweb.google.com/1168565...g&noredirect=1





    sigpic “In theory, theory and practice are the same. In practice, they are not.” ― Albert Einstein

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    • #47
      Re: 36" build in Tallahassee - AKA Bruce's Folly

      In your last pic you have a steel lintel, dont use a steel lintel as it will twist and warp all over the place from the heat.
      The English language was invented by people who couldnt spell.

      My Build.

      Books.

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      • #48
        Re: 36" build in Tallahassee - AKA Bruce's Folly

        Thanks,
        Actually, I had simply used it to mark the 12" height. However, I had thought the pompelli plans recommended angle iron for a rectangular entry and would have used it if i went that route. At this point I am planning to make an arch to span the opening. Any thoughts about how high the vertical sides should be? You seem to be one of the goto posters regarding arches and masonry. Bruce

        Right now watching live reports regarding Boston bombing. Appears the suspects have been arrested, not official yet.
        Link to my build here:
        http://www.fornobravo.com/forum/f6/3...lly-19181.html

        Check out my pictures here:

        Selected pictures of the build.

        https://picasaweb.google.com/1168565...g&noredirect=1





        sigpic “In theory, theory and practice are the same. In practice, they are not.” ― Albert Einstein

        Comment


        • #49
          Re: 36" build in Tallahassee - AKA Bruce's Folly

          Originally posted by Bec1208 View Post
          Right now watching live reports regarding Boston bombing. Appears the suspects have been arrested, not official yet.
          Side step...

          Good news.
          Some home grown nutter no doubt.
          The English language was invented by people who couldnt spell.

          My Build.

          Books.

          Comment


          • #50
            Re: 36" build in Tallahassee - AKA Bruce's Folly

            Originally posted by Bec1208 View Post
            Any thoughts about how high the vertical sides should be? You seem to be one of the goto posters regarding arches and masonry. Bruce
            Mark out you arch on paper, cardboard, whatever.
            The top of the arch need to be within the golden ration/mean 1.62%.
            Your markings out of the arch will dictate the height of the springing point.

            Heres a sample of what you need to do to mark out your arch.
            Last edited by brickie in oz; 04-19-2013, 12:53 AM.
            The English language was invented by people who couldnt spell.

            My Build.

            Books.

            Comment


            • #51
              Re: 36" build in Tallahassee - AKA Bruce's Folly

              Originally posted by brickie in oz View Post
              Mark out you arch on paper, cardboard, whatever.
              The top of the arch need to be within the golden ration/mean 1.62%.
              Your markings out of the arch will dictate the height of the springing point.

              Heres a sample of what you need to do to mark out your arch.
              Al, I did some googling to try and better understand the ratio as applied to arch design. Have to say much of it went over my head (maybe because it's after 4 am my time). Assuming an 18" width and apex of 12", is there a simple method to determine the height of the side wall? I am going to call it a night and will try and work it out after some sleep.

              Current report is one suspect dead other at large.
              Link to my build here:
              http://www.fornobravo.com/forum/f6/3...lly-19181.html

              Check out my pictures here:

              Selected pictures of the build.

              https://picasaweb.google.com/1168565...g&noredirect=1





              sigpic “In theory, theory and practice are the same. In practice, they are not.” ― Albert Einstein

              Comment


              • #52
                Re: 36" build in Tallahassee - AKA Bruce's Folly

                Start with working out the finished inside oven height (top of dome inside), then 62% of that height is the top underside height of your arch.
                Work backwards to your marked out arch, you then have the springing point height of the arch.

                Brickwork is always worked backwards from the final finishing point.
                The English language was invented by people who couldnt spell.

                My Build.

                Books.

                Comment


                • #53
                  Re: 36" build in Tallahassee - AKA Bruce's Folly

                  Bruce,

                  The front counter (abt 8" deep) I do not use as much as the side counters. It basically holds the beer bottle . From the inner arch to outside of my decorative arch is 12". But like you say, you need to build what works for you. I think you are on the right track, go for tight inside dome joints and use mortar as your friend. One thing about mixing mortar for your dome, use only need to mix small batches. Good luck.
                  Russell
                  Google Photo Album [https://photos.google.com/share/AF1Q...JneXVXc3hVNHd3/]

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                  • #54
                    Re: 36" build in Tallahassee - AKA Bruce's Folly

                    Originally posted by UtahBeehiver View Post
                    Bruce,

                    One thing about mixing mortar for your dome, use only need to mix small batches. Good luck.
                    By small, is that about a pint or maybe a quart?

                    Bruce
                    Link to my build here:
                    http://www.fornobravo.com/forum/f6/3...lly-19181.html

                    Check out my pictures here:

                    Selected pictures of the build.

                    https://picasaweb.google.com/1168565...g&noredirect=1





                    sigpic “In theory, theory and practice are the same. In practice, they are not.” ― Albert Einstein

                    Comment


                    • #55
                      Re: 36" build in Tallahassee - AKA Bruce's Folly

                      Start with a pint or less - you're looking for enough to set 5-6 bricks. You'll have to guess on the volume, as that will depend on the size of the gaps that you're filling, and how quickly it sets up on you.

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                      • #56
                        Re: 36" build in Tallahassee - AKA Bruce's Folly

                        Thanks, that's helpful. Bruce
                        Link to my build here:
                        http://www.fornobravo.com/forum/f6/3...lly-19181.html

                        Check out my pictures here:

                        Selected pictures of the build.

                        https://picasaweb.google.com/1168565...g&noredirect=1





                        sigpic “In theory, theory and practice are the same. In practice, they are not.” ― Albert Einstein

                        Comment


                        • #57
                          Re: 36" build in Tallahassee - AKA Bruce's Folly

                          Worked on arch and entry layout. First pic is a quick cardboard setup. This was,interrupted when heavy started. The apex is at 11.25", very close to 62% of 18" (11.16"). I did a 15" setback which seems more manageable. This should leave about 3-5" from the outer entry to the front of the stand.

                          I picked up and unloaded the the 100 firebricks I had ordered. Good thing is there are 85 cents cheaper per brick. Bad news is they appear to be lighter duty compared to the $2 brick from the other source. Did not ask their restocking policy but assume there will be a significant charge.

                          My first thoughts are to buy enough of the $2 brick to cover the oven floor.

                          Will the lower duty brick work okay for the dome, perhaps with a cladding layer of mortar. Or, I could use the brick I have for the lower levels and use higher quality brick for the top of the dome. Other option would be to slightly lower the dome height.

                          Any thoughts? Bruce
                          Link to my build here:
                          http://www.fornobravo.com/forum/f6/3...lly-19181.html

                          Check out my pictures here:

                          Selected pictures of the build.

                          https://picasaweb.google.com/1168565...g&noredirect=1





                          sigpic “In theory, theory and practice are the same. In practice, they are not.” ― Albert Einstein

                          Comment


                          • #58
                            Re: 36" build in Tallahassee - AKA Bruce's Folly

                            Gudday Bruce
                            Heavy duty means a lot more time and wood is required to heat up. Lite duty as you have probably discovered after moving them are a fair bit heavier than a house brick! Heaps of mass to store the heat in. My own oven is lite duty.
                            You will probably use roughly 40 on the hearth floor, 150 odd for hearth and dome depends on cutting. How many you will use on the outer entrance comes back to design. I seem to remember mine (42 in) consumed 165 odd bricks for dome and hearth then I used commons outside.
                            Before I forget if you want more mass on the hearth floor don't lay the bricks flat turn them on the side,then your floor will be thicker. Use a few more bricks but probably suit multiple bread bakes more.
                            Anyway back to brick cleaning I'm finally getting around to buttressing that arch,you have "shamed" me into it
                            No not really I'm I loving the chance to work outside .... It's a beautiful day
                            Regards dave
                            Measure twice
                            Cut once
                            Fit in position with largest hammer

                            My Build
                            http://www.fornobravo.com/forum/f51/...ild-14444.html
                            My Door
                            http://www.fornobravo.com/forum/f28/...ock-17190.html

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                            • #59
                              Re: 36" build in Tallahassee - AKA Bruce's Folly

                              My guess would be the 2 buck brick is medium duty and these bricks are light duty, qa bit lighter and 8". It's funny, when I explain the theory of WFO's to my friends, I feel like an expert - but when I look at the empty stand, not so much. Based on reading this site, it seems better the mid duty would be better for the floor. Not clear to me if adding extra mass with cladding would make dome performance equivalent. I suspect any of the approaches would be functional. Still, one may be at least somewhat better.

                              I made some Salmon Poppers on my green egg (ceramic grill) and posted as a new thread.

                              http://www.fornobravo.com/forum/f31/...ers-19244.html

                              By the way: 2nd suspect arrested in Boston
                              Link to my build here:
                              http://www.fornobravo.com/forum/f6/3...lly-19181.html

                              Check out my pictures here:

                              Selected pictures of the build.

                              https://picasaweb.google.com/1168565...g&noredirect=1





                              sigpic “In theory, theory and practice are the same. In practice, they are not.” ― Albert Einstein

                              Comment


                              • #60
                                Re: 36" build in Tallahassee - AKA Bruce's Folly

                                There's a thread on another forum... it seems the thermal properties of a W-G light duty floor are well matched to the biscotto tiles in the Italian professional ovens. As for the dome, they also cut a lot easier - faster cuts, and much less wear on the blade. I think you're golden.

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