#1  
Old 08-25-2011, 10:42 AM
Serf
 
Join Date: May 2010
Location: Pennsylvania
Posts: 24
Default MT's 42 in State College

I have been working on a patio project this summer that has yielded some serious mission creep. What started out as a plan to replace my small existing patio has turned into a 1200 square ft patio with a pergola and a wfo. I have completed most of the patio and poured the concrete base and hearth for the oven. I have never laid block or brick in my life until this summer. I have two main questions that I hope the forum can help me with.
1. I have seen and read about the indispensable tool. Are there directions or tips on how to make one? I have searched but I cannot locate a thread discussing it.
2. While building the dome, do I need a brick saw or can I get by with an angle grinder with a diamond blade?

Thanks to all for your help. If my oven turns out half as good as all of yours I will be elated. Thanks, Mike
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  #2  
Old 08-25-2011, 11:25 AM
Il Pizzaiolo
 
Join Date: Jun 2009
Location: So. Orange County, CA. USA
Posts: 1,157
Default Re: MT's 42 in State College

1 - The tool is a simple way to limit the dome brick at a set distance from the center of the oven floor. There are fancy tools with clamps and magnets but initially it was a string from the oven floor's center point and the skill was to make the mortar tacky enough to hold the brick at this set distance.

I made a tool using a caster mounted upside down on a piece of plywood set on the floor bricks of the oven. The wheel was replaced with a rod and at the set distance, the radius of the oven, a short piece of angle iron was attached to the rod that then served to limit the dome brick being placed. I have a link to a thread for you to peruse.

http://www.fornobravo.com/forum/f28/...idea-2573.html (Hendo's dome gauge -- nice idea)
http://www.fornobravo.com/forum/8/sc...ld-7035-3.html (SC Chris's 42" WFO build)
See post 25 for my version

2 – A grinder is a great tool and it can be used, but the dust and discomfort is going to be considerable. Check your local craigslist for brick saws. You’ll be happy you did and you can resell it for what you paid.

Chris

Last edited by SCChris; 08-25-2011 at 11:27 AM.
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Old 08-25-2011, 02:08 PM
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Join Date: May 2010
Location: Pennsylvania
Posts: 24
Default Re: MT's 42 in State College

Thanks for your reply, I will try to see if I can locate one. One more question, once I start the chains for the dome, how many can be completed at once? Should you not start the next chain until the mortar dries on lower chain or can you lay them over top one another with no problem? Thanks again, Mike
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Old 08-25-2011, 02:30 PM
Il Pizzaiolo
 
Join Date: Jun 2009
Location: So. Orange County, CA. USA
Posts: 1,157
Default Re: MT's 42 in State College

The number courses that can be completed is a function of your time and your mortar. If your mortar sets up relativly fast then I'd expect that a good day is 3 courses. The entry takes more time to complete because of the tie in to the dome.

John's build shows a lot of thought and great execution, the entry is really well done..
http://www.fornobravo.com/forum/8/octoforno-7122-5.html (OctoForno) Post 46..

Dino_pizza is a great build for it's detail and take a look at:
Les's build at
http://www.fornobravo.com/forum/f8/les-build-4207.html (Les' Build)

http://www.fornobravo.com/forum/f28/...our-12453.html (If you had the chance to rebuild your oven, what would you change?)
for builders recomended changes.

Chris
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  #5  
Old 08-25-2011, 02:51 PM
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Join Date: Aug 2008
Location: Sacramento, CA
Posts: 174
Default Re: MT's 42 in State College

Hi mtalone,

I second Chris's post above. It all depends on the builder, the mortar, and the brick cuts. I had someone helping me and we were able to complete 5 chains in one day (including the arch transition and moving past it).

But you don't have to wait until the first chain dries before starting on the next one. Just keep going.

aceves
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  #6  
Old 08-26-2011, 09:54 AM
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Join Date: May 2010
Location: Pennsylvania
Posts: 24
Default Re: MT's 42 in State College

Thanks to all for the advice. I hope to work on the oven this weekend unless the hurricane gets out of hand. I will post more pictures as I go along. Thanks again and have a great weekend. Mike
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  #7  
Old 08-26-2011, 03:05 PM
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Il Pizzaiolo
 
Join Date: Oct 2006
Location: Vancouver Island
Posts: 1,374
Default Re: MT's 42 in State College

If you use a "fan" form instead of the "indispensable tool" approach you can lay up as may chains at once as you like.
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  #8  
Old 08-27-2011, 03:01 PM
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Join Date: May 2010
Location: Pennsylvania
Posts: 24
Default Re: MT's 42 in State College

Hey Guys,
I started laying my oven floor this weekend until the hurricane weather came in. I am placing my floor on the FB board. My hearth is perfectly level (or as close as I can make it) but the FB board is not. It all seems to even out over longer stretches but not all of my bricks are flush as a result. Do you think this will be a problem? Also, just laying them on top of the fb board still allows them to move. Is this ok? Sorry if these are basic questions, I am feeling like I have gotten in over my head this time.. Mike
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  #9  
Old 09-16-2011, 08:22 AM
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Join Date: May 2010
Location: Pennsylvania
Posts: 24
Default Re: MT's 42 in State College

I have been working on the oven every chance I have over the last few weeks. I have made some progress and am overall happy with how things have turned out so far although I wish I could start over knowing what I know now. I guess you can say that about most things in life. I have a couple questions:

First, around my arch transition I have some places that aren't perfectly smooth which I guess is inevitable to some degree. I found a product that is "castable firebrick". It mixes like mortar. Would it be a good idea to fill in irregular areas around my transition with this? Do you think it would be a problem?

Secondly, I would like to start my vent opening this weekend. I am going to build it like "karangidude" did. I think what he did was a great way to build it. How wide should I make the opening for a 42. I have heard bigger is better, is that true? Thanks to all for your help. Mike
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