New 32" build in Saskatchewan, Canada

[thebigt]

Re: New 32" build in Saskatchewan, Canada

So after using my IT i was able to visualize the issues pointed out to me by Utah with my arch support placement. Fortunately the mortar is fairly new and not super hard to get off. I just started my 4th course so I removed the end bricks in each row as well and will replace them with appropriately sized bricks.

Lesson learned for the next oven lol

[UtahBeehiver]

Re: New 32" build in Saskatchewan, Canada

This link will also help you. Here is a pic of an arch similar to yours.

http://www.fornobravo.com/forum/8/octoforno-7122-7.html#post119582

[thebigt]

Re: New 32" build in Saskatchewan, Canada

Thanks for pushing me to get that arch form built, it's much easier to visualize with something real in place! I had been putting off building the arch form as I was concerned at the difficulty but Google seems to work well I found this link which helped me visualize drawing out a segmented arch.

http://tic.wpengine.netdna-cdn.com/w...Segmental1.png

I built the form with relative ease and am happy to be passed that. I seem to worry about things that aren't overly difficult!

Anyways I put a few bricks at the dead center of the top of the arch and I had one that I had cut earlier for a arch support piece but cut it wrong and used my IT to match up a half brick and it was almost flush(See attachment). So given that I think that I am good to proceed.

[UtahBeehiver]

Re: New 32" build in Saskatchewan, Canada

Build your arch form and see what you need to do at the top dead center of the arch using your IT. Most likely the arch brick will need to be longer and adjusted for the shape of the dome. If you can make if work at the TDC then the rest of the arch will work.

[thebigt]

Re: New 32" build in Saskatchewan, Canada

So after I got my honey doo list done I went back outside and took the tarp off the oven and dry fitted the 3rd arch brick and checked where the IT intersects and my IT just barely misses the edge. Am I ok or should I start over with the arch support pieces?

[UtahBeehiver]

Re: New 32" build in Saskatchewan, Canada

The inside of the arch should intersect the inside of the dome. Here is a pic showing the first arch brick and arch form relative to the inside of the dome. I cut off the small triangle piece to the right of the pencil line by the IT so it matched the inside of the dome. Hope this helps.

[thebigt]

Re: New 32" build in Saskatchewan, Canada

Made some progress today. Got my 2nd course done and started the 3rd. Though I will need to look at my arch brick placement, and also looking at my picture some seams are getting a little closer than I'd like. The rain came and I had to pack up but of course it stopped once I had put everything away!

[thebigt]

Re: New 32" build in Saskatchewan, Canada

Big T,

IMHO, Take a look on how the position of the current placement of the first arch brick is going to affect the dome on higher courses. The first arch brick is currently in-set by a couple inches from the inside diameter of the dome. This could affect the shape of the dome later on. Just something to look at.

Thanks for catching that! Given your thoughts I should move it back out of the oven and line it up with the outer edge of of the inner diameter? Easy to correct now as I've only started on my 3rd course.

[UtahBeehiver]

Re: New 32" build in Saskatchewan, Canada

Big T,

IMHO, Take a look on how the position of the current placement of the first arch brick is going to affect the dome on higher courses. The first arch brick is currently in-set by a couple inches from the inside diameter of the dome. This could affect the shape of the dome later on. Just something to look at.

[cobblerdave]

Re: New 32" build in Saskatchewan, Canada

well! to me all this discussion re flue is way over the top! It only keeps a bit of smoke out of your eyes when you open the door! It does not have any effect on the oven, quite a few people don't even bother with a flue?

G'day
My flues no higher than my dome but does keep the smoke from my face. My mates oven has an internal chimney which has to be blocked at some stage to stop heat loss. Those hot gases coming out of that oven mouth can take out your fringe,eyebrows and beard pretty fast.
Of course an oven will work without an entrance/chimney, my opinion they are worth the bother to build
Regards dave

[tonybaker]

Re: New 32" build in Saskatchewan, Canada

well! to me all this discussion re flue is way over the top! It only keeps a bit of smoke out of your eyes when you open the door! It does not have any effect on the oven, quite a few people don't even bother with a flue?

[thebigt]

Re: New 32" build in Saskatchewan, Canada

Well I finally made some progress today. I'm a bit behind schedule as I spent a week at the lake and yard work needed to be done!

I got the floor layed down on Sunday and today I got the 1st course in place and mortared. The arch bricks gave me a bit of trouble figuring out the angle to cut and then I used an abrasive blade in my cheap chop saw and while it cut through easily the blade wobbled. So I eventually just used the chisel and hammer and then cut the angle off the corner.

I'm hoping to get more done tomorrow. My plan is to build up the arch 3 bricks high then start the arch...That will likely be my next challenge and I'll have to do some research on how to calculate the angle it needs to go on and then get it drawn out.

[thebigt]

Re: New 32" build in Saskatchewan, Canada

T,
I think that I would go with 48" on the height.

It sounds to me that after allowing clearance (for the framing, the cement board, insulation and full thick face brick), the chimney is going to take up a heck of a lot of real estate. You might want to draw that out to scale to see just how wide it would need to be.

I know that you are concerned about replacing the liner later, if it cracks. But so what if it does. It probably wont fall out on to your pizza since it is laying in a vertical plane. If it is placed in there secure enough, and you stay away from those "useless" nuke sized fireloads, there should not be a problem.

I don't know if it is a better way, but I notched my 4"X8" face brick to save weight and some of that "real estate". The 2" space between my brick liner and the face brick was filled with vcrete.

[ATTACH]43875[/ATTACH][ATTACH]43876[/ATTACH]


I feel like a similar approach would help with the uneven cooling associated with clay liners and also give some lateral support.

[ATTACH]43877[/ATTACH]

An 8" OD clay liner would require a 16" OD for your face brick, if they were notched.

Thanks Gulf. I think you are right that the chimney would be massive if I did as I described. I'll definately look at doing the same thing that you did on yours as that looks like it would work for me as well.

[Gulf]

Re: New 32" build in Saskatchewan, Canada

T,
I think that I would go with 48" on the height.

It sounds to me that after allowing clearance (for the framing, the cement board, insulation and full thick face brick), the chimney is going to take up a heck of a lot of real estate. You might want to draw that out to scale to see just how wide it would need to be.

I know that you are concerned about replacing the liner later, if it cracks. But so what if it does. It probably wont fall out on to your pizza since it is laying in a vertical plane. If it is placed in there secure enough, and you stay away from those "useless" nuke sized fireloads, there should not be a problem.

I don't know if it is a better way, but I notched my 4"X8" face brick to save weight and some of that "real estate". The 2" space between my brick liner and the face brick was filled with vcrete.




I feel like a similar approach would help with the uneven cooling associated with clay liners and also give some lateral support.



An 8" OD clay liner would require a 16" OD for your face brick, if they were notched.

[thebigt]

Re: New 32" build in Saskatchewan, Canada

I'm on vacation next week without the kids so planning on starting then. I am planning on using some 8x8OD clay flue that I have , will 24" be tall enough? I was thinking of framing it with something such as cement board and then wrapping in 1" ceramic fibre blanket and then building a brick chimney around that with some veneer bricks that I have. The reason for framing it first was in case it cracks I could in theory put another one in its place as I have 8 kicking around. Does this sound like an ok idea or isthere a better way? My eesearchbwas inconclusive so far.