#11  
Old 11-21-2008, 09:40 AM
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Default Re: Alternating Partial-Taper brick construction?

Thanks Dmun,

Yes, I would have been surprised if this approach had not been done in practice or planned by someone given the amount of time that people put into their planning or project construction. Your sketch clearly illustrates the alternating tapers.

Cheers
Joe
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  #12  
Old 11-21-2008, 10:48 AM
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Default Re: Alternating Partial-Taper brick construction?

Hi Bandrasco,

The program I used (Sketchup) is a great program from Google. It is free to download! I have used another true cad program but this one is amazing in the ability to quickly draw very accurate models. It is much more intuitive with a very fast learning curve (Parabolic). If I finish up my Sketchup model to the point where I am happy with the final design I can post the native drawing so people can download Sketchup and open up the drawing, modify and play as they wish.
Cheers
Joe

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  #13  
Old 11-21-2008, 11:30 AM
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Default Re: Alternating Partial-Taper brick construction?

In terms of setting up the saw once for each layer or course, would it make sense to taper one side of each brick only?

On second thought, I see. You set the jig on your saw, cut the taper, flip the brick and cut the other taper - no changing of the jig. I think the alternating taper cut bricks look better than one side on each brick - though you could alternate layers.... taper left; taper right; taper every other...

Christo
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Old 11-21-2008, 11:42 AM
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Default Re: Alternating Partial-Taper brick construction?

http://www.fornobravo.com/forum/f6/1...mula-5207.html (1311 Refractory motar formula)

1 part Lime, 1 Part Portland, 1 part fireclay and 3 parts sand seems to be one mix method referenced around here. these materials are pocket book friendly for sure. There are more recipies if you poke around.

I'd think you could use the refrax mix for archs and structural things like that and the mix above for general oven construction. Overall I feel the expansion is likely similar to the brick in both cases (as soon as things have cured and moisture has been driven out)

Several folks here have built successful ovens here with that mix or mixes that are similar. Check out Frances thread on her oven - I don't think her mix even had portland in it.

Christo
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  #15  
Old 11-21-2008, 02:54 PM
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Default Re: Alternating Partial-Taper brick construction?

Hi Joe,
Your Sketchup dome is great. Welcome to the forum! You've generated some good points on tapering and having others previous ideas on 1 thread is helpful to us about to begin our build.

I was set to taper 2 sides and bottom of all lower courses but everyone says it's tiring to do that much saw cutting and people's diamond blade life seems to vary greatly. But the fully tapered domes (like Les') look beautifully fit and trim!

Thanks for sharing, Dino
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  #16  
Old 11-21-2008, 04:12 PM
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Default Re: Alternating Partial-Taper brick construction?

Quote:
Originally Posted by Dino_Pizza View Post
But the fully tapered domes (like Les') look beautifully fit and trim!
Dino, to set the record straight - I just tapered the sides with a compound angle to get rid of the annoying "V". I shimmed the back to get the correct angle. It is possible to do a complete dry stack, and that would be cool. If I had it to do over again - I think I would give it a shot.

Thanks!

Les...
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Old 11-21-2008, 04:38 PM
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Default Re: Alternating Partial-Taper brick construction?

Hi Dino,
It is fun to hear about the different approaches and experiences and the great conversations here certainly will reduce the number of mistakes made by those who have yet to construct their oven (like myself). I think the approach (like Les, or an alternating approach) used to get rid of the void between adjacent rectangular bricks is more than sufficient given that ovens made from rectangular bricks work quite well. I would like to get rid of the triangular void between bricks but would shim the vertical angle and fill with refractory mortar.

My intention is to have a nice looking dome with minimal work. I am not an advocate of trying to build to nuclear reactor standards. http://www.fornobravo.com/forum/imag...es/biggrin.gif
Cheers
Joe
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  #18  
Old 12-16-2008, 09:11 PM
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Default Re: Alternating Partial-Taper brick construction?

When I built my dome I cut every alternative brick to give a nice tight fit. I wasn't scientific about it, I just eyed it up and cut them with my nine inch angle grinder and a diamond blade. It was surprising how neatly you can cut them.

I started doing it on about the fourth coarse. My only regret is that I did not start doing it sooner as I hated filling the gaps inside the oven once the dome was finished. It was dark, cramped and very hot.

Good luck. Like you sketchup work, very impressive.

Jase
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  #19  
Old 12-16-2008, 10:07 PM
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Default Re: Alternating Partial-Taper brick construction?

Jase,

Thanks for the post and suggestion to start the tapering early. I think as you suggest when it comes time to cut bricks one does not need to be overly precise on the exact angles.
Cheers
Joe
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  #20  
Old 12-17-2008, 03:16 AM
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Thumbs up Re: Alternating Partial-Taper brick construction?

Jase,
Quote:
It was dark, cramped and very hot.
You don't (or shouldn't) get into your oven after you've just cooked your pizzas because it will be HOT. Believe me, it gets even hotter with a bright light inside with you.
Dark, well if you have a stomach like mine, it fills the opening when you have your head and shoulders in them stopping all the exterior light from illuminating your task.
They are all cramped once you try to crawl inside them, unless you built a huge one! Better off sending in the smaller (other half) to do the cleanup!
My glasses were fogging up completely within a couple of minutes whilst inside my oven during the final cleaning process

Neill

PS. Just joking about the hot oven!
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