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Are these firebricks the right weight? - Forno Bravo Forum: The Wood-Fired Oven Community

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Are these firebricks the right weight?

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  • Are these firebricks the right weight?

    We're all set to start building the oven floor. I decided to double check our red firebricks and compare them to the yellow ones I bought for another project years ago.

    The red firebricks are 8 5/8 " by 4" and weigh 6.3 pounds apiece.

    The yellow firebricks are slightly larger-- 8 7/8" by 4 3/8" and weigh 7.5 pounds.

    Does the weight of the red firebricks sound right? Low duty? Medium duty?

    Thanks very much!

    P.S. I am taking photos of my oven every step of the way. I'm in the middle of "work stuff" and "life stuff" right now, so posting them is beyond my abilities.

    I really appreciate all the support and advice that's on this forum!

    --DB

  • #2
    Re: Are these firebricks the right weight?

    Sounds about right: The weight thing is to warn people off the kind of insulating firebricks used in ceramic kilns, which would weigh under two pounds. I believe that you'd need a scientific scale to determine the alumina content in brick - they would all look the same to a postal scale.
    My geodesic oven project: part 1, part 2

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    • #3
      Re: Are these firebricks the right weight?

      Thanks very much. That's a big relief!

      I have another question, which I'll post separately, because it's about the insulfrax blanket. The supplier I've called has it in 2" x 24" x 12.5' in 3 weights--4 lb, 6 lb, and 8 lb. I'm inclined to go with the heaviest, but maybe that's overkill.

      I'll post this question separately.

      DB

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