Nathan's 36" SoCal WFO build

[n8huntsman]

Thermal Break Support

I got this all fabricated and will do the final install tomorrow hopefully. The part that actually contacts the oven is .012″ (.3mm) Inconel for the high temps. The main face is .125″ (3mm) regular stainless. Next I can start the entry arch to support the chimney.

[n8huntsman]

Re: Nathan's 36" SoCal WFO build

I should have thought about this earlier, it may not be too late though. I could extend the .125" plate down to the bottom of the concrete and anchor it. If I did this do you think the .125" plate would be structurally sound enough to support everything?
If not, I may have to weld some gussets to it and beef it up.
Thoughts?

I was able to modify the plate so it will now anchor to the 5.5" face of the concrete. I think I've decided (against KB's concerns) to push ahead with the design as shown. I hope I don't regret this decision but I made it after looking at many pictures of existing ovens and considering the structure of my design. Does anyone else have an opinion on this matter? The arch will be supporting about 4' of 8" duratech chimney pipe and two 45? elbows.
Thanks

[n8huntsman]

Re: Nathan's 36" SoCal WFO build

I'll try to come up with some way of reinforcing them with some stainless steel. It's easier for me to work with metal than it is brick. Speaking of... I got my channels formed. When I finish the .125" plate, I'll use it as a guide to bend the curved channel.

[kbartman]

Re: Nathan's 36" SoCal WFO build

I should have thought about this earlier, it may not be too late though. I could extend the .125" plate down to the bottom of the concrete and anchor it. If I did this do you think the .125" plate would be structurally sound enough to support everything?
If not, I may have to weld some gussets to it and beef it up.
Thoughts?

My concern were these bricks falling out if the mortar loosened over time. I'm curious what others think.

[n8huntsman]

Re: Nathan's 36" SoCal WFO build

I should have thought about this earlier, it may not be too late though. I could extend the .125" plate down to the bottom of the concrete and anchor it. If I did this do you think the .125" plate would be structurally sound enough to support everything?
If not, I may have to weld some gussets to it and beef it up.
Thoughts?

[n8huntsman]

Re: Nathan's 36" SoCal WFO build

...my concern is the vent area, transition and vent pipe not being supported equally on both sides with two structurally sound arches of the same design.

Any ideas of how I can support the chimney and pipe without tying it into the dome? Here are some updated drawings trying to better show the .125" SS plate and .012" SS cladding.
You don't think the .125" plate is structurally sound enough to hold things together?

[kbartman]

Re: Nathan's 36" SoCal WFO build

Okay slight design mod here. I understand I only need a small thermal break but don't really want to completely redesign the stuff that remains. I've decided to form an arched U-channel to retain the upper insulating material. Similar to the entry sill that I already had planned except arched. This is made out of .012" (.3mm) stainless sheet. On the face, that leads into the chimney, I will use a 1/8" (3.2mm) stainless steel plate to retain the insulating material and prevent it from crumbling into my entry over time. Since it will now be fully contained, I'm thinking of using cal sil. or ceramic fiber blanket with a layer of vermiculite over it, then a final stucco coat for waterproofing.
Anyone see any issues with the new plan? Any preference of cal sil vs the blanket for this application?
Thanks

Nathan,
Congrats on plugging your dome. Awesome brick work and I love your CAD drawings and 3D modeling.

My concern is with your vent area and chimney/vent structure. Gulf and many others as myself, have our chimney structures constucted with two self supporting brick arches tie together with vent transition into the chimney structure and or vent pipe. Best as I can see of your with your 3-D model. Looks like you will not have a brick chimney and only a vent pipe. But my concern is the vent area, transition and vent pipe not being supported equally on both sides with two structurally sound arches of the same design. My concern is with the V-Crete, the thin stainless and their expansions, this may create some structural instability.

Just my humble opinion.

I really like the looks of the beautiful flowing curve of your vent transition. It should help channel that smoke up your vent nicely. How will this be supported and tied into the V-Crete and stainless on the back side of your vent area/transition?

[the_dr_masuess]

Re: Nathan's 36" SoCal WFO build

Man! I just closed up my dome yesterday and It is not as neat and tidy on the outside for sure... and I'll know later today how the inside looks. I love your stainless thermal break too. It's nice having access to build such a piece. Yours looks awesome! Looks like it took quite a long time!

[n8huntsman]

Re: Nathan's 36" SoCal WFO build

Must be an optical illusion. They are all 2.5" on the outside. The inside is slightly less on the last two due to the taper cut on the top and bottom.

[DavidApp]

Re: Nathan's 36" SoCal WFO build

Hello Nathan

I was looking at the ring next to the plug and the ring next to that. They look wider than the third ring out from the plug so I thought you may have turned the brick like the one on the left in my photo.

I think that I was cutting the brick into four at that point and getting the angles cut was getting tricky. I also rounded the outside corners.

David

[n8huntsman]

Re: Nathan's 36" SoCal WFO build

Thanks for all the comments. As far as turning the bricks 90?, not exactly sure what youre seeing.
On the 5th row, I turned my brick but only out of convenience. I was previously cutting the brick in half, orienting the cut in half end to the OD of the oven, then tapering the two sides. This was 5 cuts for 2 pieces.
I realized that I could take a whole brick, cut my tapers on the side, then flip the piece that is left over and use the other side of the cut. This left the inside and outside of the oven with uncut sides. This made it 3 cuts for two pieces. Here's a pic. My original way on the left new way on the right. As I worked my way up and the pieces got smaller, I was able to cut 3 or even 4 pieces out of 1 brick with minimal cuts.
The only thing I did differently on the last two rows was tapering all 4 sides of the brick instead of just the sides. Not sure if this is what your seeing or not. On the last row, in addition to the tapers, I rounded outside of the brick to get a tighter fit.
I have access to a lot of tools, not quite a sheet metal shop, but I can make do with what I have.

[DavidApp]

Re: Nathan's 36" SoCal WFO build

Looks really good.
Did you turn the bricks 90 degrees in the last 2chains to make narrower pieces?

Your design mod looks like a great idea. You must have access to a sheet metal shop.

David

[Greenman]

Re: Nathan's 36" SoCal WFO build

Nice. Very tidy and for what it is worth, I like it a lot.

Your plan for the thermal break is what I would consider to be close to my ideal. I used RHS and your plan will be more efficient than that.

I am sure that you will be eating pizza well before the end of your summer and after that, it is everything in its own season.

[n8huntsman]

Last row complete and plug cut

Almost done! Just need to mortar the plug in, pour the entry slab counter, build the entry arch, insulate the entire outside, cure it, stucco it, mount the chimney… No way the entire bar is going to be done by summer!

[n8huntsman]

Re: Nathan's 36" SoCal WFO build

Okay slight design mod here. I understand I only need a small thermal break but don't really want to completely redesign the stuff that remains. I've decided to form an arched U-channel to retain the upper insulating material. Similar to the entry sill that I already had planned except arched. This is made out of .012" (.3mm) stainless sheet. On the face, that leads into the chimney, I will use a 1/8" (3.2mm) stainless steel plate to retain the insulating material and prevent it from crumbling into my entry over time. Since it will now be fully contained, I'm thinking of using cal sil. or ceramic fiber blanket with a layer of vermiculite over it, then a final stucco coat for waterproofing.
Anyone see any issues with the new plan? Any preference of cal sil vs the blanket for this application?
Thanks