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Posted by marson on April 12, 2008, 8:07 am
> wrote:
>
>
>
>
>
> >> Hello, I will build a concrete block wall 4 blocks high for a garage.
> >> Three of the courses will be below grade. I want to make this wall as
> >> strong as practically possible. (I could not use a poured wall because of
> >> access problems). I live in a freeze/thaw area. I want to use some rebar
> >> in the cores for strength. Should these cores with rebar be filled with
> >> concrete or mortar? Also anything I can do to prevent cracking from the
> >> freeze/thaw cycles? Would a control joint on each wall make sense?
> >> Thanks, paul
>
> >Thanks.
> >Basically I don't want the wall to crack. It will sit on a 8 x 16 footer at
> >the frost line. The wall will be 4 blocks high with 3 below ground. My
> >concern was could expansion/contraction from freezing/thawing crack the
> >wall? And if so, is there anything I can do to prevent this?
> >I'm not sure this would normally happen, so maybe it's not a problem, but
> >since I don't know I sent the post. I will use the rebar in the footer and
> >at 4' as DanG suggested.
> >Thanks,
> >Paul
>
> How tall are the blocks? You probably will want the bottom of your
> footing about 4.5 to 5 ft down.
As long as the bottom of the footings are below code frost depth
(which is certainly shallower than 4.5 to 5' in Indiana!) you should
be fine.
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