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Concrete Pilings to get below frost line? - Forno Bravo Forum: The Wood-Fired Oven Community



I'm Peter Reinhart! Ask Me Anything! Monday, February 15, 2016 7:00-8:00 pm EST

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.

Ask Me Anything New Forum Feature

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.

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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Concrete Pilings to get below frost line?

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  • Concrete Pilings to get below frost line?

    Hi all,

    I worked one summer pouring concrete & when we did walkways we would use an auger to drill 4 foot holes every 6 feet or so to support it.

    I'm looking at building a small outdoor kitchen & was wondering if I would employ a similar method to support it, rather than setting the foundation all the way down.

    It will consist of a pizza oven, gas grill, fridge & potentially a sink. I live in central Alberta & the winters get COLD!

    What other solutions other than full foundation do the Canadians here use?


  • #2
    Re: Concrete Pilings to get below frost line?

    I believe that sonotube type protrusions from a slab is the worst of both worlds: they give ice lenses something to grab onto. I think the best solution for a freestanding oven is a slab on well drained crushed stone. The theory is that if there is no water next to the slab there is no frost heave. If you want to use sonotubes, they make a flaired form for proper base footings, but that's almost as much trouble as building footings below the frost line.

    If you are building an oven inside, you will have to follow building code for masonry fireplaces, which means foot thick footings protruding six inches beyond the perimeter of your structure, poured on undisturbed soil. For a freestanding structure, I think it's complete overkill.

    For a Canadian approach to the same problem, you can research "frost protected shallow foundations"
    My geodesic oven project: part 1, part 2