I'm going to install a concrete footer/base for an outdoor fireplace.
The specs say this footer/base must be able to hold 1500 lbs. I
haven't received the fireplace yet, so I don't have the full specs/
directions (I do have the dimensions), I want to get started on the
footer before it gets real cold. My questions are:
1) The Fireplace itself is 2' x 4.5' , what should the dimensions of
the footer/base be?
2) How thick does this footer/base have to be?
3) Do I need a real footer, like a deck footer below the freeze line?
4) It's going to be right next to my patio, should I tie it into the
patio (which is only 5" thick) or just pour it next to it?
Why? If I read right it's a freestanding fireplace out
by the patio. Pour a slab on the surface 4 or 5 inches
thick maybe 6 inches bigger than the fireplace. Put a
little rebar in it just to keep it together. So it
floats with frost. Let it. So does your patio.
Sometimes we tend to go overboard.
On Dec 12, 4:47 pm, firstname.lastname@example.org wrote:
A couple of things, from my limited knowledge:
You really only need to go down below the frost line for the dwelling
unit foundation and things attached to it. Typically soils are
expected to support at least 1500 lbs per square foot, so the size of
the base shouldn't be a huge deal. I wouldn't tie it into the patio,
since the base and patio might "heave" differently with the frost in
the winter. As for how thick, I really don't know. A couple pcs of
rebar wouldn't hurt...
On Dec 12, 5:47 pm, email@example.com wrote:
Larger than the fireplace - how much larger is up to you. You can
treat the base as an extension of the patio with additional room, or
just make it the same size as the footprint of the fireplace if that's
all you need and want.
That depends on what it's made out of and whether you want to build
for the ages.
That depends on your soil conditions, and how you build the base. I
wouldn't go down three feet for such a light load. I'd excavate a bit
deeper and compact some crushed stone or other drainage material under
the slab or pavers. That should take care of the frost heaving. If
the fireplace sits on feet, I'd probably go with a slab. If it's on a
continuous base and your patio is built of pavers, I'd probably go
Well, I guess your patio is a concrete slab. Now the question becomes
whether you want the extension to appear seamless (it won't no matter
what you do), or if you want to set off the base.
Basically, it's entirely your call as it's primarily aesthetics.
Contact the manufacture and find out if there is a photo gallery so
you can get some ideas of how other people dealt with it.
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