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Post by marudge on Apr 4, 2013 16:07:12 GMT
Hey, your build is great. You are just ahead of me, which is ideal! Can I ask about the brick arch? I have been toying with different lintels to put across the opening but I see you haven't used one at all but simple put a nice looking arch in there. Does the pad itself provide enough support not to need a lintel? Thanks Regards Mark
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Post by h12rpo on Apr 4, 2013 17:10:39 GMT
The arch is purely decorative in as much as its not intended to be loadbearing (although it probably would simply because it is an arch). The thing to remember is that the upper slab contains a rebar mesh and so the slab doesnt need any support across the span. In effect it forms its own rsj. In my photo you can see the slab is temporarily held up in the middle with some blocks. On top of the blocks is ply board and the concrete is poured onto this.....the rebar is buried in half its depth. When all is set, the middle support blocks will be removed. If all the above is confusing do a bit more research on the builds of others on this forum and all will make sense
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Post by cannyfradock on Apr 4, 2013 17:59:55 GMT
Arches can take a fair bit of weight....
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Post by h12rpo on Apr 16, 2013 19:55:25 GMT
Removed the shuttering, removed support, cut and shaped the thermolite blocks. and mortared them into place. (although this photo shows them before I mortared them into place ). Getting excited now !
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Post by h12rpo on Apr 21, 2013 13:57:17 GMT
Sun shining in Cardiff yesterday so got a bit done......its very exciting to be building the dome at last, but also a bit terrifying, so first, out with the drawing (which I spent an inordinate amount of time on trying to get things in perspective in my head). Then actually laying up the hearth bricks on the drawing to establish where the cuts would be......you'll see that it was only at this stage my original chimney position was completely wrong so another drawn in ! (and yes I know there are two 15's ......now I do anyway!). Also, it was only at this stage that I realised I hadnt actually drawn out a herringbone pattern as was my intention.......no matter the lines of the brick hearth are still at 45 degrees so as not to catch the peel so I left it like that. After much centering/moving/marking/prevaricating, I eventually mixed some homebrew and transferred the drawing placements to the insulating deck and started the soldier course of 1/2 bricks. It was my intention to place a piece of cardboard around the hearth and but the soldiers up to that but I forgot!
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Post by h12rpo on Apr 21, 2013 14:03:42 GMT
Up Up and away! View of the IT and more courses. About this time I had a rethink on the opening and found I'd left myself some awkward cuts where the pillars join the chains .....see the right hand pillar (stupid boy!). The right hand six blocks are just placed in position to make me feel like I've done more that I have Here's a closer look of that silliness at the pillar
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Post by h12rpo on Apr 23, 2013 14:39:28 GMT
one more chain today although had some serous head scratching with the arch/dome transition
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Post by h12rpo on Apr 23, 2013 14:40:22 GMT
inside photo
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Post by h12rpo on Apr 23, 2013 14:43:56 GMT
also did some parging and some tidying of perps - two words I've been dying to use spot the deliberate mistake..... Thought I was being cocky and forming the start of the chimney. however if I placed the opening to the chimney there, I wouldnt be able to get a seal on the door - DOH!
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Post by cannyfradock on Apr 23, 2013 17:56:39 GMT
r2d2
....now then. There's some serious building going on at Chez Vous!!
Nice neat work....I must try and use a jig in my next build. It's always a bit tricky ....the arch/dome transition, but a bit of trial and error usually suffice's.
I think I can see what you was attempting with the top bricks of your internal arch.....just remember.......internal arch and dome are one. The external arch/entrance and vent forming are separate.
Great pics....and I love the progress.
Terry
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Post by h12rpo on Apr 26, 2013 17:04:36 GMT
A bit more progress today and yesterday in between hailstone showers but boy am I fed up with cutting bricks and brick dust everywhere......and Mrs R2 is pi$$ed right off with the dust I'm dragging in house closer ( have started the heat break using the sawn celcon/thermolite blocks ...well, why not.)
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Post by cannyfradock on Apr 28, 2013 12:37:33 GMT
r2d2
.....brilliant progress. Again I touch my forelocks to you Sir if you are making trapazoid cuts in the dome. I like the idea of using thin pieces of thermolite block to cause a heat stop from internal to external arch. I've seen this once before but can't remember where.....but it works. On my last Pompeii I used fire rope....only time will tell if it works. Out of interest on my first few Pompeii builds I just butted external arch up to internal arch with no thermal break..... for anyone reading this....it doesn't affect performance of the oven that much....it just makes a good job even better.
Also love the herringbone hearth...on the diagonal!!. I do a herringbone fashing but lay it square to the dome.....yours is of course worth that extra effort as your pizza peel will "glide" off that hearth floor.
Love your work....
Terry
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Post by h12rpo on Apr 29, 2013 17:03:43 GMT
Another dry sunny day in Cardiff and with Mrs H12 at the mother in laws, I good a good amount of graft in. heres the underneath of the board which the sand dome was going on. Then a top view of the sand dome on the board Not exactly perfectly round but hey, the pizza wont care. Heres the 'topped out' photo ----whey hey!!!!! I placed the bricks on the sand with the spacing and poured a very wet mix of the homebrew into all the cracks from the outside. The idea I think was sound but I wasnt brave enough and didnt do it quite wet enough so the mortar didnt go right the way down the cracks and therefore left me with a large amount of pointing the inside which is what I was trying to avoid.....anyway I think the idea was sound ( next time eh?) - so inside photo: Close up showing the 'trap' cuts on the final chain (oooh, get me!)
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Post by mickytapp on Apr 29, 2013 19:17:43 GMT
Hi Cardiff, just speed reading this post thread, well ok looking at your pics mainly and I have a question. Are you going to include a chimney? I have read that the Portuguese don't use chimneys and prefer to vent the smoke through the door. I am considering a purchase of a ready made oven and I have noticed that some models have a chimney and others don't of the same make. Is the lack of chimney designed t help keep the oven hot for slow cooking? Best regards MickT
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Post by mickytapp on Apr 29, 2013 19:37:08 GMT
oops sorry h12rpo got your name wrong!
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