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-   -   Thickness of Hearth (http://www.fornobravo.com/forum/f8/thickness-hearth-16297.html)

GeorgePalmer 07-06-2011 03:33 PM

Thickness of Hearth
 
Hi,

I've search for this but can't find anything, so just want to double check. Is 3.5" thick enough for the concrete hearth? It'll be reinforced with rebar and will have the fibre board on top + oven and housing. By my reckoning this could be:

300 bricks for housing * 2.5kg = 750kg
150 fire bricks for dome and floor (guess similar weight) = 275kg
? bricks for chimney (yet to be designed)

So guess would want strength for 1.5t to be sure. Any thoughts? Have enough concrete to make it upto 5" thick if required (presumably the extra weight of the concrete is better rather than stressful on the bricks below?).

George

brickie in oz 07-07-2011 02:05 AM

Re: Thickness of Hearth
 
Quote:

Originally Posted by GeorgePalmer (Post 116556)
Any thoughts?

Its all about the span as to how thick the concrete is, the bigger the span the thicker it should be.

GeorgePalmer 07-07-2011 03:02 AM

Re: Thickness of Hearth
 
It's 1.6m x 1.6m with a triangle (0.95x0.95x1.35) cut out the corner, for the classic corner design.


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