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  #11  
Old 10-15-2013, 01:42 AM
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Default Re: Modified 3G Masterly Tail Build

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Not sure where you got 200 from-
Prolly from the brick on edge and the thick concrete underneath it.
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  #12  
Old 10-15-2013, 02:03 AM
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Default Re: Modified 3G Masterly Tail Build

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the hearth bricks will sit on edge on, giving a floor thickness of 115mm, on top of a full 4" of perlcrete insulation above the hearth slab.
There is insulation under the floor bricks, so it could hardly be considered thermal mass.

Last edited by david s; 10-15-2013 at 02:50 AM.
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  #13  
Old 10-20-2013, 02:48 PM
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Default Re: Modified 3G Masterly Tail Build

ok so made a fair bit of progress on Saturday - Got the stand put up and filled with concrete.

The blocks were on the terrible side of 'pretty crap', and I was chasing plumb & level with every course.
One fell apart in my hand when I picked it up. I guess they are using the bear minimum amount of cement in them to maximise profits.
Some of them were different heights left to right, and the faces weren't straight on a lot of them.
From here on up, the sides will be finished with 1/2 width blocks - If I get these blocks from the same supplier, I will mortar them in from now on.

This stand be rendered/painted/skinned with stone (haven't decided yet) so it doesn't have to look amazing, just be structurally sound.






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Last edited by Mitchamus; 10-20-2013 at 05:52 PM.
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  #14  
Old 10-20-2013, 03:01 PM
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Default Re: Modified 3G Masterly Tail Build

I made a dent it the Hearth slab formwork on Sunday morning too.

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  #15  
Old 10-22-2013, 04:28 PM
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Default Re: Modified 3G Masterly Tail Build

I have managed to source some 2nd hand insulating fire bricks to make a thermal break between the oven vault and the chimney.

They are in pretty poor condition, but they will be in the back of the chimney, and I'll use the best ones in the spots that can be seen, or perhaps cut them to clean the faces up a bit.
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Modified 3G Masterly Tail Build-img_2770-1-.jpg   Modified 3G Masterly Tail Build-img_2769-1-.jpg  
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Last edited by Mitchamus; 10-22-2013 at 04:38 PM.
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  #16  
Old 10-22-2013, 04:37 PM
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Default Re: Modified 3G Masterly Tail Build

I'm torn as to whether to add in the Ash drop or not.

I built one on the swishy, and I have used it about 3 times in 5 years.
I do think though it aids in drawing air directly into the oven, but as far as removing ash...
there is never really any ash to remove, and what there is... can be shoveled out with a peel.

The only times I think it's useful is to remove ash/charcoal when baking or roasting... but usually at these times you are removing a live fire... and are putting it directly into a metal wheel barrow or old paint tin.
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  #17  
Old 10-23-2013, 04:47 PM
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Default Re: Modified 3G Masterly Tail Build

Do you need to add re-enforcing in the insulating hearth layer?

to my mind, this would decrease the insulating capacity... but is it needed for strength?
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  #18  
Old 10-29-2013, 02:45 PM
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Default Re: Modified 3G Masterly Tail Build

ok so I got the hearth slab layed on the weekend

Nearly there:


All finished!


And I also got the insulation slab all poured too.
Formed up:


Done:


Next job this weekend is to pour a 2" mass layer under the floor, and then I can start the oven floor!!!
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Last edited by Mitchamus; 10-30-2013 at 01:44 AM. Reason: fixed pics
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  #19  
Old 10-29-2013, 11:11 PM
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Default Re: Modified 3G Masterly Tail Build

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Next job this weekend is to pour the 2" cladding layer, and the I can start the oven floor!!!
Whats a cladding layer?
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  #20  
Old 10-30-2013, 01:47 AM
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Default Re: Modified 3G Masterly Tail Build

Sorry, I mean a thermal mass layer.
I have decided to add 2" of extra mass under the floor.
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