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I have been reading code for residential fireplaces and most…

I have been reading code...
I have been reading code for residential fireplaces and most that I have seen say to install a 12” footer.
I had planned on installing a 6” pad on top of the 4” pad.Do you think this will handle the load?
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Answered in 6 minutes by:
3/20/2018
Rick
Rick, General Contractor
Category: Home Improvement
Satisfied Customers: 24,405
Experience: Licensed construction supervisor with 35+ yrs. experience.
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A 6" footer with re-bar on top of the existing slab is plenty. You're building a patio fireplace with a much shorter chimney than a residential fireplace so much less load.

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Customer reply replied 4 months ago
Ok. I’m trying to lay the fireplace out in my 3D drawing program with cylinder blocks so I don’t have to cut them as much as I stack. What is the required wall thickness?

There are no requirements for a patio fireplace. 8" block with a fire brick fire box and a tile lined chimney flue will comply even for a fire place attached to a house. You can't dry stack anything smaller than 8" block.

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Customer reply replied 4 months ago
Ok. The 8x8x16 can be stacked and if I cut that in half 8x8x8 I can stack that in there. But if I use 4x8x16 I can’t stack those any where

You can't stack 4" block. You can buy full and half block with a squared off end for corners and ends.

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Customer reply replied 4 months ago
Ok. In the video I have referred to before it looks like the builder used either 4” or 6” blocks on the end and also for the firebox. So if I try to replicate this one to some degree I’ll have to butter my joints
https://m.youtube.com/watch?v=1cUxOIiNsXw

Since you're dry stacking the outer perimeter has to be 8" block. inside that you can use whatever works

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Customer reply replied 4 months ago
Ok. So the outside perimeter can be dry stacked with 8” block and then inside I can use smaller but I’ll have to mortar the joints if I do?

Yes

Rick
Rick, General Contractor
Category: Home Improvement
Satisfied Customers: 24,405
Experience: Licensed construction supervisor with 35+ yrs. experience.
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