John's 42inch Aussie WFO

[John K]

Re: John's 42inch Aussie WFO

Does anybody have any information as to whether I need to support my suspended slab from underneath with a post or something similar? I am pouring a slab that is supported by brickwork right round expect for a door opening which is a metre wide. The slab will be 2.2 metres by 1.9 metres. I will make the slab 4" inches thick and am prepared to use as much steel mesh and re-bar as necessary.

Hi Mr G

I over engineered mine with 2 angle lintels. But at the end of the day it depends how comfortable you are with such a large span. You will definetly need a support under it untill your hearth slab sets.

cheers

[bigred]

Re: John's 42inch Aussie WFO

sorry I was just able to unsubscribe myself......

thanks anyway and good cooking to all
BIGRED

[bigred]

Re: John's 42inch Aussie WFO

can someone please remove me from this thread...I keep receiving email but am not involved in this discussion

thanks
bigred

[nissanneill]

Re: John's 42inch Aussie WFO

mr g
you should not need anything in the centre as the weight of the dome is supported around the perimeter walls. There is very little weight in the centre and if you need to, you could always weld plates on the ends of a piece of pipe, hammer it into position and secure with a couple of dynabolts.
When poring your slab, double the F62 mesh for that extra strength, one top in concrete and the other nearer the bottom.

Neill

[jmhepworth]

Re: John's 42inch Aussie WFO

When I build another one, I plan to divide the wood storage area into two the way I did with this one, but I'm not going to bother with the angle iron and the one row of block across the top of the openings, letting the concrete slab do the work. With enough rebar, I'm sure it will work fine.

[ThisOldGarageNJ]

Re: John's 42inch Aussie WFO

Mr G..

I put a block wall about half way thru the slab, Im not sure that it was really necessary, But it made me feel better..

Cheers
Mark

[mr g]

Re: John's 42inch Aussie WFO

Does anybody have any information as to whether I need to support my suspended slab from underneath with a post or something similar? I am pouring a slab that is supported by brickwork right round expect for a door opening which is a metre wide. The slab will be 2.2 metres by 1.9 metres. I will make the slab 4" inches thick and am prepared to use as much steel mesh and re-bar as necessary.

[mr g]

Re: John's 42inch Aussie WFO

John,

I am not much help with the number of bricks as I am still in the process of building but if it is any help, so far my build has taken me 27 beers to get to 4courses of bricks above the soilder, although this also includes the slabs and the block work. I estimate that it will take me at least another 24 beers and maybe even more if this hot weather stays (today was a 4 beer day ie 39deg C!)

Maybe it's best to get 2 cases of beer just in case

Paul

Boy am I glad I read this post, I was planning to lay my suspended this coming weekend and I have just realised that I had way under ordered my beer supplies. As usual the Frono Bravo Forum proves invaluable.

[Alter ego]

Re: John's 42inch Aussie WFO

John,

I am not much help with the number of bricks as I am still in the process of building but if it is any help, so far my build has taken me 27 beers to get to 4courses of bricks above the soilder, although this also includes the slabs and the block work. I estimate that it will take me at least another 24 beers and maybe even more if this hot weather stays (today was a 4 beer day ie 39deg C!)

Maybe it's best to get 2 cases of beer just in case

Paul

[3G_]

Re: John's 42inch Aussie WFO

Hi John, i bought 180 for 42". I will use most, i have a dozen or so lft and i course and the plug to go. I used tapered for the arch(additional).

[MikeyMann]

Re: John's 42inch Aussie WFO

Our firebricks 'down under' measure 230 x 115 x 75 mm. That equates to 9 x 4.5 x 3 inches in the imperial scale.

John, I forgot to mention that in addition to the 185 straight bricks I also bought 16 tapered bricks for the arch and vent. The taper is moderate... 75mm on one side, 63mm on the other.

[jmhepworth]

Re: John's 42inch Aussie WFO

Full, with all but the floor, the soldiers and the entry arch cut in half (or smaller).

[Mitchamus]

Re: John's 42inch Aussie WFO

240 full bricks? or 240 half bricks?

[jmhepworth]

Re: John's 42inch Aussie WFO

I used about 240 in my 42 inch oven, including the dozen or so that I wasted. That includes the bricks in my "double wide" entry arch.

[ThisOldGarageNJ]

Re: John's 42inch Aussie WFO

Hi John,
What size firebrick are you using "down Under" I used a few over 200 pieces for my total build. american size 2.5 x 4.5 x 9 inch... 42 inch oven

Cheers
Mark