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arched opening? - Forno Bravo Forum: The Wood-Fired Oven Community

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New Forno Bravo Forum Feature

Forno Bravo Forum Community,

You will notice a new forum at the top of the main page called, "Ask Me Anything". This forum will be used for live one hour "Ask Me Anything" (AMA) sessions hosted by people who are knowledgeable in different areas pertaining to wood fired ovens. How it works:
- Each AMA will have a "sticky" thread where the community can post questions they would like answered during the live session. This will allow everyone to participate even if you can't be online for the live session. These questions will not be answered by the host until the live AMA; if you need an answer quickly, you should post it in the appropriate Forum area for the community to respond.
- Another thread will be posted for the live AMA. Registered users who are logged in during the live session can interact with the host by asking questions and receiving responses.
- The live thread will remain in the AMA forum to view after the session.

To kick off our AMA feature, we have invited author, chef and master bread maker and host of Pizza Quest, Peter Reinhart, to be our first host! Peter will be in the Forum on Monday, February 15th, from 7:00 - 8:00 pm EST. If you are unable to be online during the live session, you can post your questions in the sticky post. Peter will answer those questions during the live session on February 15th. You can view Peter's answers to your questions as well as what happened during the live session in the session thread.

We hope you enjoy this new feature! Please let us know if there is a topic that you'd like to have as an AMA and we'll look for a host!

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  • arched opening?

    Jim posted this photo of a pre-fab FB oven today.



    Is there any reason that home builders don't build this style of semi-circular entrance arch? We see so many ovens crack at the thin arch top of the usual style rectangualar or shallow arch opening. It seems that this would be stronger, as well as being easier to tie into the shape of the dome.
    My geodesic oven project: part 1, part 2

  • #2
    Re: arched opening?

    I think 2 reasons:
    1) The bricks pictured all appear to be tapered, with the bottom brick on each side appearing larger than a tyical firebrick - Tapered bricks can be very expensive; the local refractory supplier (the only place within 100 miles who stocked them) had prices that started at $4.50 per brick and wnet up to nearly $8 depending on size and degree of taper.

    2) Novice builders are a bit intimidated by the geometry involved and more importantly the skill they think they need to accomplish this. Remember, the basic Pompeii plans really don't call for anything more than right angle cuts and 1/2 bricks. Personally, I had done considerably BASIC stone, tile, and masonry work in the past and I too fell into this category to some extent. I actually started with the arch and entry, then proceeded to the dome where I tapered every brick...I think the confidence I gained building the arch and entry was the driving force behind tapering every dome brick and attempting as tight a fit as I could achieve. Bottom line, I think many believe arches to be difficult and as I mention, a bit intimidating. If I ever build another it most certainly will have a more decorative and supportive entry/arch.

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    • #3
      Re: arched opening?

      I built a catenary-type flue arch from tapered blocks but apparently was a bit careless when mortaring in the keystone: resulting in fine cracks on either side of the keystone. And on advice of the supplier of tapered flue and door arch bricks, I started on the twin arches FIRST and only then began laying the dome bricks...

      Still think the arch itself is nice and stable, and the tapered bricks worked very well. I'd recommend this type to other dome builders - just take extra care with the keystone!

      Cheers,

      LMH
      Last edited by carioca; 02-04-2008, 12:54 AM.
      "I started out with nothing, and I've still got most of it"

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      • #4
        Re: arched opening?

        Dmun,

        Just for clarity, I should point out that the archway on the Modena is cast as a single piece. The "brick" look comes from the mold they use. On the sides, it's nearly four inches thick. There's a slot in the top into which the metal vent fits quite nicely. Good thing I had help to get it into position.

        The next one I do, I'll take photos of it from various angles. This might help.

        Jim
        Last edited by CanuckJim; 02-04-2008, 08:47 AM. Reason: incomplete
        "Made are tools, and born are hands"--William Blake, 1757-1827

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        • #5
          Re: arched opening?

          I'm seriously contemplating opening a pizza establishment with a financial partner. So.. I've been checking out ovens.
          I think I am leaning toward gas fired... (I don't want to live at the place taking care of a wood fired oven) I've been checking out James selection of gas ovens for commercial use.
          Have you had much experience with these types Jim?
          And can they put out 60 - 70 pies an hour?

          Anyways.. I thought I'd ask.

          Dave
          My thread:
          http://www.fornobravo.com/forum/f8/d...ress-2476.html
          My costs:
          http://spreadsheets.google.com/pub?k...Xr0fvgxuh4s7Hw
          My pics:
          http://picasaweb.google.com/dawatsonator

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