#1  
Old 11-25-2010, 01:56 PM
Laborer
 
Join Date: Oct 2010
Location: new zealand
Posts: 62
Default Cutting Fire Bricks

Has anyone ever cut a 230mm fire brick into 4 leaving 50mm, or should they be cut into 3 max (75mm). This is to cut costs down as the best I can get a single brick for is $6.50 thus if cut into 3 it is $2.16 each or if 4 $1.65 each.
Any suggestions on this
Cheers
Kriso
I can get clay pavers for $1.95 each but they are only 50mm high not 75mm
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  #2  
Old 11-25-2010, 03:53 PM
mklingles's Avatar
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Join Date: May 2010
Location: Portland, OR
Posts: 93
Default Re: Cutting Fire Bricks

You may need a sketch of the cuts your thinking of to get a good answer.

My thought is that the dome and floor require a certain mass of fire brick. Cutting them into smaller pieces doesn't seem like it would reduce the total number of bricks required. Maybe I'm miss-understanding your question.
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Old 11-26-2010, 12:01 AM
david s's Avatar
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Location: Townsville, Nth Queensland,Australia
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Default Re: Cutting Fire Bricks

You could go for the cheaper pacers and back it up with a bit more cladding on the outside to get the thermal mass. That's what I'd do.
Dave
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Old 11-26-2010, 12:31 AM
Laborer
 
Join Date: Oct 2010
Location: new zealand
Posts: 62
Default Re: Cutting Fire Bricks

I was thinking of that dave and just add a little extra to the vermiculite layer. I may have some old second hand fire bricks on the way but they are pretty old, do you know what type of life span a fire brick has and if they will deteriorate when cut.
Cheers
Kriso
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Old 11-26-2010, 01:20 AM
david s's Avatar
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Default Re: Cutting Fire Bricks

Old second hand fire bricks should be quite ok, if they are really high duty bricks they may be harder to cut.
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Old 11-26-2010, 02:57 PM
GianniFocaccia's Avatar
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Default Re: Cutting Fire Bricks

Kriso,

Even if they are old, I think your used firebricks will be fine. If you want to add thermal mass, you can add a couple inches of refractory mortar to the outside of your dome. Adding thickness of vermiculite is adding insulation.
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