Pdx 42" update

[Macrinehart]

And here's the form for the opening arch! This is cut 1/8" low so it can be propped on slats that I'll remove after the arch is done to drop the form and make it easier to pull out. Didn't have enough plywood to do the proper height so there is a gap on the bottom outside. Like the handle?

Cheers, Mac

[Macrinehart]

Hey Duane - Yes I did get the security warning today and I think there is a web server security issue someone will have to investigate.

Regarding the positioning of the bricks I believe I'm ok but I'm no expert either. My plan is simply to dry fit the opening arch first and use my IT, once it's setup, to verify the positioning. If any adjustments are required I will make them accordingly.

Thanks, and congrats on closing your Dome!

Cheers,

Mac

[Hamilton]

Hey Mac, my name is Duane.
Couple of things!
Did you get any kind of security message when you logged in today? When I logged in through safari this morning I was given a warning that the Forno site certification has expired and may not be private. I ignored it and logged in anyway. Just a moment ago I tried it with google and got a similar message. You are the only other one that I can see that has posted today.
Next, while I am an no expert and hopefully somebody will weigh in here pretty soon.To me it looks like your entry bricks to the oven are to far back not allowing for the next brick to extend a little further in to the oven as you go up. I set the inner corner toward the front to the pencil line you have drawn for the outer diameter and trimmed the brick extending into the oven to match the inner diameter of the oven. As you go up there will be less to trim.
I found the forum after I has started my build and have been following your build/plans, I wish I had planned for a heat break, larger reveal around the oven entry and handled my IT differently, but we are going to get there. Closed my dome today, what a feeling!

[Macrinehart]

Hi All - It's Saturday, what a day! Today I finished up the floor, decided to go with herringbone pattern and not regretting it. After spreading the sand/fire clay mix I decided to redo that work because the grain size was not fine enough. In order to get a better size I borrowed the fine siv from the kitchen, 2 mm square holes, and sifted all the pebbles out of my fire clay. Once that was done the notch trowel worked a lot better, and the floor went in easily as well.

I wrapped up the day by cutting all the perimeter bricks, and laying out the opening. The oven entrance is ever so slightly off center, but I think it's close enough that it will not be noticeable in the finished project. Overall I'm pretty satisfied with today's progress, but I think I will build the form for the opening before I finish.

[Macrinehart]

Ok, hopefully this hits the mark. I adjusted back to the Point suggested by mongota, at the center line that's 3-13/16" inch inside the dome. I marked the IR line on the block, moves the arch back a little shy of 2 inches from the prior placement.

[JRPizza]

Look back at post #34. You have a couple of inches of fore/aft placement where the TDC brick will intersect the dome. People that need to shorten up their landing as much as possible due to design constraints can move the arch towards the center, but that takes up some cooking space and leaves very little protrusion to build the chimney up/over. I moved mine forward/outward as much as I thought I could and still have a good inner radius on my TDC, as I wanted to have plenty of arch sticking out for my vent area. If you have room, I'd say move it out (away from center of dome) but not so much as what you are showing in your sketch.

[mongota]

Macrinehart
Mac, you're welcome. I noticed when I blew up the drawing that the drawing I marked up still has your dome opening at 10" tall. I recall you increasing that in previous posts. Still, using the drawing as a generic guide and adjusting the build to your current dimensions should help figuring the in/out range of the TDC brick and thus your arch. Build on!
Best, Mongo

[Macrinehart]

mongota - your markup of my drawing clarifies things a lot, thank you!

JRPizza - Iooked back at your post #23, which has the same CAD drawing #133 above. I didn't have all the same context back then, it makes more sense now. I do notice that in your build thread #3 your TDC brick is further forward than the updated drawing, it looks more loke Mongata's markup. From that I assume you advise positioning the opening arch even further inside the oven.

[JRPizza]

mongota has it right - your arch is a little too far forward. This is what I was trying to explain in post #19 and 20. I should have included the sketch below but I think it is in my build thread too.

[mongota]

It's possible I'm interpreting things incorrectly, but I'll post this and let you and the moderators chime on on this. I marked up your drawing.

I outlined the original location of your TDC brick in YELLOW. As I see it, if you locate it there you'll have to infill a small piece of brick behind the TDC brick, where the LIGHT BLUE cross-hatched area is, if you want to maintain the smooth spherical interior surface of the dome. I have seen builds where builders have left voids back there, but I didn't know if that was your intention.

By moving the TDC brick further back into the dome, outlined by the GREEN line, so the back edge of the brick touches the point shown by the BLUE arrow and BLUE text box, it eliminates the need for that cross-hatched infill piece.

You then cut your TDC brick as shown by the thin BLACK line.

If I buggered this up my apologies, the last thing I want to do is cast doubt in your head about your layout, as I remember myself how confusing it can be!

[Giovanni Rossi]

The perspective of your picture certainly exaggerates the depth of the landing. However, looking at your drawing, the flue is positioned further from the dome than I’ve seen in other builds. Certainly not an expert…just my 2 cents.

[UtahBeehiver]

David S actually mentioned the deep entry a few posts back. I deep entry does make if harder to access but your choice.

[Chach]

Your earlier pic of the troweled fireclay reminded me of a japanese zen garden.

Hahah me too

[Macrinehart]

Hi Mongo - you know it's funny, I think I have planned things correctly but you're comment has me second guessing myself, even though that positioning is based on the layout I had from my full sized template, reattached below. I could cut off up to 2" on the brick length. The chimney landing is on the outer rank of bricks. I am dispensing with the third rank (which is supposed to be the decorative arch). The chimney landing is outside the door. And the door will be an insulated door fabricated by my blacksmith friend.

[mongota]

One of those "I hate to ask a dumb question" questions, but I'll post it anyway.

Having a full brick length before the door reveal puts your oven door several inches (about a half-brick length) further away from the oven when compared to most builds. Are you planning an insulated door? If so, will the flue be outside of the door?

Your earlier pic of the troweled fireclay reminded me of a japanese zen garden.