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man7sell 06-18-2012 08:38 AM

New Build Oven At Granite Falls
 
Started my first and probably only, pizza oven build. We bought a half acre next to the Pilchuck river. The pizza oven will be part of the outdoor kitchen.

Progress so far is the base built. Oven bricks, FB, Insulation material, etc purchased. Design will be a 42 inch inside 21 inch oven height.

Here's pics of the base.

http://i1087.photobucket.com/albums/...enBuild009.jpg

http://i1087.photobucket.com/albums/...enBuild013.jpg

Laku 06-18-2012 10:56 AM

Re: New Build Oven At Granite Falls
 
How thick is your heart slab? It might be just a scale illusion but that doesn't look like 4" to me?

man7sell 06-18-2012 12:23 PM

Re: New Build Oven At Granite Falls
 
You are right, it's getting a second layer with more rebar this weekend. I was going to do the insulating layer but then went for the FB option so extra concrete needed ;)

Laku 06-18-2012 01:47 PM

Re: New Build Oven At Granite Falls
 
Even with insulating layer the slab should be 4" of concrete with single cast. Insulation is not structural element, it would not withstand the weight.

I'm not sure if 2 more inches of concrete will make up that it's poured in two layers, even with more rebar. Maybe someone wiser could chime in on this?

man7sell 06-18-2012 01:52 PM

Re: New Build Oven At Granite Falls
 
My concrete expert (Contractor guy next door) say it should be good as there is a bonding agent you can use between the layers to make the concrete adhere to the first pour. This said, it may be wise to add some vertical strengthening bolts set just below the surface of the second pour. But open to any inputs...that's why we are here right?

Cheers

Paul

Laku 06-18-2012 02:02 PM

Re: New Build Oven At Granite Falls
 
I'd just add at least 1" of more concrete making it additional 3" or more. If for nothing else then peace of mind. That being said, I'm not an expert in this area. :)

Concrete is cheap compared to collapsed oven and the amount of labour that would be wasted. ;)

man7sell 06-18-2012 02:05 PM

Re: New Build Oven At Granite Falls
 
Quote:

Originally Posted by Laku (Post 133395)
I'd just add at least 1" of more concrete making it additional 3" or more. If for nothing else then peace of mind. That being said, I'm not an expert in this area. :)

Concrete is cheap compared to collapsed oven and the amount of labour that would be wasted. ;)

Good point :eek:

Tscarborough 06-18-2012 02:47 PM

Re: New Build Oven At Granite Falls
 
If you do the calculation for the weight of a full brick oven from the hearth up, you will find the required PSI of the hearth slab to be incredibly low. Factor in where the majority of the weight is (the perimeter), and a solid 2" slab will probably be fine. Add another 2" if you want, it won't hurt anything.

Laku 06-18-2012 02:54 PM

Re: New Build Oven At Granite Falls
 
Heh, and there you have it. :)

man7sell 06-18-2012 03:07 PM

Re: New Build Oven At Granite Falls
 
Yep thanks Tscarborough and Laku. I will add the 2" and re-bar for piece of mind (and because I haven't mixed enough concrete yet...... :rolleyes: )

Tried a few cuts on firebrick to work out some angles. Glad we bought a professional grate tile cutting a couple of years back when my friend left the construction business. He had used it for only one bathroom project so it is like new. Cuts through them bricks like butter :)

http://i1087.photobucket.com/albums/...enBuild015.jpg


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