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Thermal expansion in floor/vent landing design - Forno Bravo Forum: The Wood-Fired Oven Community

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Photo Galleries are back! Instructions below.

Dear forum users,
Thank you for your patience with the Photo galleries. We've got your galleries online!
We have finished writing a custom script to migrate the PhotoPlog to vBulletin5’s albums.

Unfortunately V-Bulletin killed the "Photoplogs" in their software upgrade which was unforeseen and we're the first development group to have written a script for getting the galleries back... that said, it took some time to reverse engineer the code and get the albums to move over seamlessly!

Forum users will be able to access their “PhotoPlog” images through their user profile page by clicking on the “Media” tab.
They will also be able to browse other albums by going to the albums page. (On the forum site, there is a link in the black bar beside “Forums” to the albums.)

In order for users to create an album please follow the steps below.
1) Go to user profile page and click “Media”
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3) Enter Photo Gallery Title in the first field
4) Click Upload or Select from Photo Album to add photos
5) Click Post
6) Once posted, the album will be created as a “Topic” on the albums page for the public to see. The topic title will be the “Photo Gallery Title” they created before uploading their photos.


To create this migration path we used vBulletin5’s default album structure. Unfortunately, it won’t work like the “PhotoPlog” but is an album/gallery component on the forum now.
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Thermal expansion in floor/vent landing design

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  • Thermal expansion in floor/vent landing design

    Hi all,

    I'd first like to express my admiration at the creativity and engineering capability of the folks on this forum. You have truly inspired me to think that I might be able to build an oven myself, despite my lack of masonry skills. So thanks for that! -- (wife not so thankful, however, since all I've been able to talk about for the last two months is pizza ovens!)

    I'm in the design stage for a 42" Pompeii.

    I'd like to build the dome around the floor to maximize heat retention. I've noticed that a lot of the ovens on the forum that use this design DO put in a gap between the floor and the dome and between vent transition and the entry arch to allow for thermal expansion.

    However, once into the vent landing, it looks like most people do not leave a gap for expansion between the vent landing and the vent structure/decorative arch, and between the firebricks and the oven landing.

    I'd appreciate thoughts on whether a gap between all floor bricks and all vertical structures would be worthwhile. In my newbie way of thinking, there's a lot of heat in one of those ovens and the more expansion joints the better. Even if the vent landing floor isn't getting too hot, is it moving around as a result of the expansion of the cooking surface bricks?

    Any chance the lack of such expansion joints might be causing some of the issues with cracks in the arch and other structures?

    Thanks,
    Jim

  • #2
    Re: Thermal expansion in floor/vent landing design

    Originally posted by jschwappach View Post
    Hi all,

    So thanks for that! -- (wife not so thankful, however, since all I've been able to talk about for the last two months is pizza ovens!)

    Thanks,
    Jim
    It's catching, soon they will be on board as well!
    RCLake

    "It's time to go Vertical"
    Oven Thread

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    • #3
      Re: Thermal expansion in floor/vent landing design

      Jim, brick expansion based on saturated heat is something like .21 max. This is why those that are building the dome around the floor bricks are leaving 1/8 to 1/4 gap. As for the entry area, no gap occurs with wall bricks to floor because the heat is much reduced, although it still exist. The heat likely does not expand the bricks enough for such concern. I hope this answers your question.
      An excellent pizza is shared with the ones you love!

      Acoma's Tuscan:
      http://www.fornobravo.com/forum/f8/a...scan-2862.html

      Comment


      • #4
        Re: Thermal expansion in floor/vent landing design

        I removed my vermiculte/concrete layer on the outside half of my landing area. I developed 1/8th inch gaps between some of the bricks from the heat expansion. I think it has something to do with the differences in the insulating abilities of vermicrete v. concrete. It makes perfect sense to me (now) that the entryway is subject to different expansion/contraction than the dome. My soldier course was on top of the floor, if that makes a difference.

        The .21 expansion might be significant. I'm not sure if this number is a percentage. I'm pretty positive that different manufactures of bricks have different numbers too.
        GJBingham
        -----------------------------------
        Everyone makes mistakes. The trick is to make mistakes when nobody is looking.

        -

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        • #5
          Re: Thermal expansion in floor/vent landing design

          I have a quater gap for my dome, none for the arch. My entire wall system is off the floor bricks.
          An excellent pizza is shared with the ones you love!

          Acoma's Tuscan:
          http://www.fornobravo.com/forum/f8/a...scan-2862.html

          Comment

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