#21  
Old 08-10-2013, 04:06 PM
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Location: puget sound, wa
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Default Re: ~38" build in Seattle

By the way, thank you to everyone who's offered help and advice so far. I hope my oven comes out marginally close to the quality builds I watched y'all do.

I'm nervous about actually committing to mortaring bricks together. Even knowing it's going to work out, it's tough to just jump in with zero first hand experience and a few years of reading these threads.
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  #22  
Old 08-10-2013, 08:43 PM
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Location: Minneapolis, MN USA
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Default Re: ~38" build in Seattle

Quote:
Originally Posted by pluscwc View Post
I don't understand that. The shape of the roof of the oven should be defined by the IT and if I make each run level or not. Or how else I screw things up.

My arch template is defining the forward edge of the arch. The back edge(s) of the arch is defined by the IT. Looking at the arch brick, these are the two rightmost faces. The upper face should be radial from the center point, the lower face should be perpendicular to that one, in the same plane as the inside of the oven. I can change where that is a little bit, but if I push it further back into the oven, I will need to make the arch taller to get it tangent with the interior of the dome. Without changing the template height, I can move the template back only as far as the bottom of the piece currently shown, which does nothing to the arch or dome geometry. It's just an artifact of having a template that is too thin.
I posted this before but it sometimes requires repeating.

The key for me in understanding this type of inner arch design was to understand that the slope of the cutoff for the top of the inner arch (the cut that will receive the dome bricks) is defined by the inner radius of the dome -- lower edge of brick, the outer radius of the dome - upper edge of brick, and the slope of the cut, as a vector from the center of the oven.

This works for straight sided openings as well as circular. You need to check alignment of all of the bricks in the arch if it is hemispherical as the shape starts at the first course.
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Last edited by mrchipster; 08-14-2013 at 04:37 AM. Reason: Typo
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  #23  
Old 08-13-2013, 10:11 PM
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Join Date: Aug 2009
Location: puget sound, wa
Posts: 15
Default Re: ~38" build in Seattle

Quote:
Originally Posted by mrchipster View Post
I posted this before but it sometimes requires repeating.

The key for me in understanding this type of inner arch design was to understand that the slope of the cutoff for the top of the inner arch (the cut that will receive the dome bricks) is defined by the inner radius of the dome -- lower edge of brick, the outer radius of the dome - upper edge of brick, and the slope of the cut, as a vector from the center of the oven.

This works for straight sided openings as well as circular. You need to check alignment of all of the bricks in the arch if it is hemispherical as the shap starts at the first course.
I think you said it better than me, but that is what I was trying to say. One exception I would take is that the upper edge of the brick doesn't need to be the outer surface of the dome, but the other two variables, slope and lower edge are important.

Got almost all the soldiers mortared in today. Need to cut a half size piece to finish, but I had run out of mortar.
Also built a PVC tarp tent so I can hopefully be ok when it rains next. No pictures since it's dark.
Next up, testing out my brick jig and deejayoh's spreadsheet.
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  #24  
Old 08-14-2013, 04:43 AM
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Default Re: ~38" build in Seattle

Quote:
Originally Posted by pluscwc View Post
I think you said it better than me, but that is what I was trying to say. One exception I would take is that the upper edge of the brick doesn't need to be the outer surface of the dome, but the other two variables, slope and lower edge are important.
.
I agree that the upper edge does not to be the outer surface of the dome but that location is important, the brick needs at least that amount of surface available for the dome bricks to seat on. If the arch brick surface is not cut back at least that far or that much material is provided there will not be enough surface to maintain a uniform thickness of brick.
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