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Posted by Glenn on July 18, 2006, 2:21 pm
A 10" thick wall seems a little heavy but I assume you have your
reasons. Pour the footing the day before forming the wall and I
would use (hire or rent) metal forms with regular form ties. That
would not only be easier, but cheaper than all the form lumber it
would take. Put the footing deep enough to allow you to use 4
foot forms and of course pour them full to screed off the top. I
would use 24" wide footings. If this is a retaining wall and it
sounds like it could be, I would go with at least 36 inch wide
footings. With your questions, I can see a disaster if you don't
use this method. Three feet of fall in 56 feet will be manageable
though I would use a slight slump, ie fairly dry. I assume you
plan on using steel rebar too.
>I want to build a concrete wall that is 56.5 ft long and 4
> ft high from the top of the wall to the bottom of the
> trench, that is, total height including the footing. The
> wall will be 10 in wide and the footing will be 20 in
> wide by 8 in. (or 10) deep. It will take 7.5 yards for both the
> wall and footing. The
> footing alone will take about 2 yards. If they bring 7
> yards will be chipper that if I order 2 plus 5.
> Then, I would have to pour footing and wall at the same
> time. Would the concrete stay in the forms up to a height
> of 4 ft? Or would if flow out through the bottom?
> Also, since the wall slopes by 3.5 ft over 56 ft, will
> the concrete run to the lower side?
>
> Than you
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