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  #121  
Old 12-11-2009, 04:29 PM
Il Pizzaiolo
 
Join Date: Mar 2009
Location: USA
Posts: 1,436
Default Re: My Cast Refractory Oven Build

hey joey,,

sounds like it worked out well....


cheers
mark
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  #122  
Old 12-11-2009, 05:06 PM
Serf
 
Join Date: Oct 2009
Location: Charlotte, NC
Posts: 22
Default Re: My Cast Refractory Oven Build

Joey,
I've been following your build with much interest, as I will be casting my oven when the weather improves. I was wondering how you were going to secure the dome to the trailer, and I guess you answered that. However, I am a bit concerned that this is not going to be enough based on this: The strapping is a low-grade thin steel-alumina metal, and once welded to the angle iron ( which I am assuming is plain hot-rolled carbon steel?) will form a very weak joint that will break with not to much vibration. I could be wrong, but I do a lot of fab & welding and have seen many thing break because of the welding of two different thicknesses and materials.

Ideally you could have cast in some stainless eyebolts every 90-degrees and used it to anchor with some sort of turnbuckle or hain, but that is water under the bridge at this point. How about just a few pieces of flat stock that would go up the sides and then bend/angle inward to meet the profile of the dome? The would not necessarily have to go all the way across the dome, rather hold it down at a few corners?

Just a though. I would hate to see it start jumping around and taking the cladding with it, or even worse......
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  #123  
Old 12-13-2009, 05:35 PM
Journeyman
 
Join Date: Mar 2009
Location: North Louisiana
Posts: 305
Default Re: My Cast Refractory Oven Build

Thanks but I think with the 4" of perlcrete going on top if it it should be good. I was planning on installing eyebolts to the perlcrete and securing it down before applying the 1" of stucco.
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  #124  
Old 12-14-2009, 05:32 AM
Il Pizzaiolo
 
Join Date: Mar 2009
Location: USA
Posts: 1,436
Default Re: My Cast Refractory Oven Build

[QUOTE I was planning on installing eyebolts to the perlcrete and securing it down before applying the 1" of stucco.
][/QUOTE] will the eyebolts go thru to the frame ?
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  #125  
Old 12-14-2009, 07:08 AM
Journeyman
 
Join Date: Mar 2009
Location: North Louisiana
Posts: 305
Default Re: My Cast Refractory Oven Build

The eyebolts will be imbedded to the perlcrete and then cables from there to turnbuckles attached to the frame...it is still in the design stages.
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  #126  
Old 12-14-2009, 07:20 AM
Il Pizzaiolo
 
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Location: USA
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Default Re: My Cast Refractory Oven Build

sounds pretty solid....
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  #127  
Old 12-14-2009, 10:24 AM
cynon767's Avatar
Apprentice
 
Join Date: Dec 2008
Location: Sacramento, California
Posts: 230
Default Re: My Cast Refractory Oven Build

I'm not an expert, but the perlicrete doesn't seem like it has enough tensile strength to hold the eyebolt securely enough to hold down the entire oven. When I had to cut mine to make channels for the steel stud track, it didn't take more than a few taps with the hammer and brickset to carve it away. It's fairly strong in compression, but it crumbles way too easily.

Even if the eyebolts were attached to tabs spreading the force throughout a larger area of the perlicrete than threads would, it seems like it would still work loose with vibration.
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Last edited by cynon767; 12-14-2009 at 10:32 AM.
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  #128  
Old 12-15-2009, 04:12 PM
david s's Avatar
Il Pizzaiolo
 
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 4,698
Default Re: My Cast Refractory Oven Build

Joey, In kiln building the ceramic inner blanket is held in position by porcelain buttons and thin high temp wire. Any conductive material that connects the inner dome to the outside is sucking heat away. If you use thick steel eyebolts they will get really hot and you'll lose heat. Perlcrete is not particularly structural and if you have turnbuckles on the eyebolts then they'll probably pull out. If you are concerned about securing the dome down I think you'd be better off with some ratchet straps over the top. My oven is only secured via the base with the outer shell attached to the base by grinding into the base and the outer shell attached to it by the adhesion of the cement and the final layer of acrylic render on the outside. It has never moved or cracked.
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  #129  
Old 12-17-2009, 07:10 PM
Journeyman
 
Join Date: Mar 2009
Location: North Louisiana
Posts: 305
Default Re: My Cast Refractory Oven Build

I guess I will wait and see how secure it is after the 1" stucco layer, Maybe a 2" wide stainless steel strap over the center of it and have the strap attached to the frame with turnbuckles that I can tighten as needed????
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  #130  
Old 12-18-2009, 03:52 AM
Il Pizzaiolo
 
Join Date: Mar 2009
Location: USA
Posts: 1,436
Default Re: My Cast Refractory Oven Build

Hey Joey,,

You can always just throw some cargo straps over it while your trailering it... attached to the frame.. Just take em off when you get there.....

Cheers
Mark
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