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  #251  
Old 04-16-2013, 11:52 AM
GianniFocaccia's Avatar
Il Pizzaiolo
 
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Location: Disneyland, CA
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Default Re: new build in werribee

Colin,

I just read through your last posts. The pics you posted show that you are exactly on track for calculating angles with the template and string. You will notice, however, that the inside (down) facing angle of your TDC brick does not meet your inside arch meaning your arch is too far forward by about an inch. You can leave the TDC brick where it is (pic with projected angle below) or slide it forward so it's flush with the arch form. This will leave you with a slightly oblong shape to the front of your dome and bit of the dreaded droop, but nothing serious. If you're fussy, you can resize the bricks at the base of your arch. I would cut an inch off the front of your base arch bricks and push your arch form back into the oven one inch. As Dennis (Deejayoh) mentioned you still need to cut each brick to match the curvature you need.

Sharkey's right. Don't worry about the angles involved with a flatter dome. Notice on my arch the inside angle of the lower third arch bricks are nearly vertical, and gradually get shallower to match the dome template as they go up. This is why you cut your TDC brick first, and cut the rest of them to create the smooth transition between inside brick faces.

HTH,

John
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new build in werribee-colin-transition.jpg   new build in werribee-arch-interior-1.jpg  
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  #252  
Old 04-17-2013, 12:57 AM
Il Pizzaiolo
 
Join Date: Jan 2012
Location: Australia
Posts: 1,042
Default Re: new build in werribee

Thanks John, Sharkey, Dennis.

Now i think i have this in my thick head.

If i leave the TDC brick where it is [intersecting the Dome Template], following the line as my cut line for the arch bricks [john's photo], i will get a circular dome. All ok here.

By sliding the TDC brick back so that the bottom angle [inside dome] lines up with the Arch template i end up with a small tear drop.

God i hope thats right because i am so over thinking this.

The dome template [shape i wanted] is actually lower at the TDC point [arch apex], hence the triangle, at the back of the arch template. As long as the TDC brick intersects the Dome Template i should have a circular dome. This is my understanding with all your help.

I have a HEADACHE

Might have been easier to have another row of 75mm [75/75/65] thick bricks - Currently the Dome Template calls for the first 3 rows are 75/65/51 that would lift the lower angles higher and the intersection would lose that triangle.

Thanks Guys
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  #253  
Old 04-17-2013, 06:58 AM
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Join Date: May 2012
Location: Salt Lake City, Utah
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Default Re: new build in werribee

Colin,

I think you got what I was talking about. Where the vertical template and the arch need to meet. I had a similar situation but not quite a dramatic and if you leave as is you will get a slight tear drop like GF said, but with creative brick cutting you can overcome the tear drop after you clear the arch (since you have the super duper jig and 14" saw). BTW, this is an area of the dome no one ever sees after you are done and cooking pizzas.
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  #254  
Old 04-17-2013, 03:44 PM
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Default Re: new build in werribee

Don't worry about the triangle. It is not a gap in the structure or anything like that, it is just that your arch form doesn't meet your dome form. Just leave the TDC brick where it is and cut as you have marked and in the end you won't even notice. The only result will be that your arch is a bit deeper (front to back) than normal, but that's mainly because of your flatter dome.
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  #255  
Old 04-18-2013, 06:02 AM
Il Pizzaiolo
 
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Location: Australia
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Default Re: new build in werribee

Thanks To All

The Penny Has Dropped.

You Are All amazing Your Experience And insights Have Assisted More Than You Can imagine especially For A 1St Time builder.
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  #256  
Old 04-20-2013, 02:54 AM
Il Pizzaiolo
 
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Location: Australia
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Default Re: new build in werribee

Hi all

Didn't get much done today. Tomorrow out all day, damn.

I got the left and right arch brick layed and a few bricks on the same course. Then had problems with the brick tray dragging through debris so spent most of the day cleaning the bricksaw out. Shit of a job when the fireclay is wet.

Cut the next course 75/51mm firebricks cut in half.

Decided to cut a cardboard version of my dome template just a little easier around the arch and I can attach it to the ply template.

Have decided to cut the arch as I go [Doug's suggestion and I think a good one]. Anyway I took a few progress photos and thought I would post them.

Did a lot of double/triple checking with various things as you will see in the photo's.
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new build in werribee-imag0592.jpg   new build in werribee-imag0593.jpg   new build in werribee-imag0594.jpg   new build in werribee-imag0595.jpg   new build in werribee-imag0596.jpg  

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Last edited by oasiscdm; 04-20-2013 at 03:02 AM.
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  #257  
Old 04-20-2013, 03:00 AM
Il Pizzaiolo
 
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Default Re: new build in werribee

and some more photo's
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new build in werribee-imag0597.jpg   new build in werribee-imag0598.jpg   new build in werribee-imag0599.jpg   new build in werribee-imag0600.jpg  
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  #258  
Old 04-20-2013, 09:04 AM
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Default Re: new build in werribee

Colin,

The dome is coming along very nicely. Agree with Doug on building arch as you go along. My experience was to keep the arch bricks ahead of the course bricks which looks like what you are doing. Nice looking arch. You should be able to split the gap in the top of the arch through the remaining 6 mortar joints on each side and your never know the wiser. Very nice work.

PS, Your build is so clean but a tip, run a strip of duct tape where your plywood template meets the dome and the up the side of the first course. This will keep any errant mortar from dropping down into the crack between the floor and the dome minimizing filling up the expansion gap between the floor and the dome.

Last edited by UtahBeehiver; 04-20-2013 at 09:12 AM.
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  #259  
Old 04-20-2013, 05:55 PM
Il Pizzaiolo
 
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Location: Australia
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Default Re: new build in werribee

Hi Russell

Thx for the feedback yes it is neat not sure how much longer it will stay that way though.

I will put blue tack around the gap and also duct tape double precautions just to make sure. I cannot take credit for the arch as I cheated I am using 75/51 arch bricks and they form that exact shape so no big deal here. In Australia arch bricks are the same price as straights but still bloody expensive. But I am still trying to use 3mm gaps through out the build.

The same with the dome I am using 75/65/51/65/65/65/65/65/65/75/65/65 + Keystone. All in the goal of achieving 3mm mortar joints maximum [this is an aim not necessarily a fact but one can only try].

I am loading a mess load of photos as I want to chronicle my build from all angles left right top, I even stand on a ladder to take photos. I found trawling Forno quite cumbersome [so much information and that is a magnificent wealth of information lburo link so much simplifies this] but once you are looking for specifics, so taking lots of photos especially of the tricky bits might be useful for someone in the future.

Also that is the reason I have come up with a way of interchanging various different dome templates, the elaborate jig, using waterproof cardboard template as a quick gauge etc.
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  #260  
Old 04-21-2013, 01:59 AM
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Default Re: new build in werribee

Colin,
like the black cardboard stuff you are using as a template. Wish I had thought of that.
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