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window hole in concrete wall Art 07-19-2007
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Posted by Art on July 19, 2007, 11:24 pm
We have a reinforced poured concrete basement walls. One wall has a window
about 4 feet wide by 40 inches tall in it 2 feet from the top of the wall.
The wall is a nominal 10 inches thich. There is no steel over the window.
Should there be? I am the guy that posted about the Jacuzi support where
the Jacuzzi is partially sticking out cantilevered over this window.
Engineer came today and looked at the joist issues inside the house but
after he left I realized the window was just in a hole. By the way, the
outside is brick veneer and there is a steel lentil holding up the brick
over the window as there should be but it is not holding up the concrete
wall above the window.

Back to the Jacuzi issue from last week:

As far as strengthing the joists, he pointed out that my vision sucked. I
had thought and previously posted that I had a cantilevered box and the rim
joist was attached to a joist that was part of the main house floor system.
Turns out there is a triple joist there parallel to the wall and the
perpendicular joists that make up the cantilever sit in joist hangers
attached to one of the triple joists. We didn't discuss it but I believe
his analysis assumed that the triple were well attached to each other. They
are not but they will be before I am done. Even so he thought that there
would be too much deflection and I should add a 4th joist or angle iron to
the triple joist. He didn't feel it had to go span all the way to the
support beams but he thought I should go as far as possible to stiffen it
up.



AppliancePartsPros.com, Inc.
Posted by Nick Hull on July 20, 2007, 8:38 am
In article

> We have a reinforced poured concrete basement walls. One wall has a window
> about 4 feet wide by 40 inches tall in it 2 feet from the top of the wall.
> The wall is a nominal 10 inches thich. There is no steel over the window.
> Should there be?

If there is no steel rebar inside the concrete over the window
opening you are in trouble

Posted by hallerb@aol.com on July 20, 2007, 8:47 am
> In article
>
> > We have a reinforced poured concrete basement walls. One wall has a window
> > about 4 feet wide by 40 inches tall in it 2 feet from the top of the wall.
> > The wall is a nominal 10 inches thich. There is no steel over the window.
> > Should there be?
>
> If there is no steel rebar inside the concrete over the window
> opening you are in trouble

run metal detector around window rebar is probably there


Posted by Doug on July 22, 2007, 1:35 am

>In article
>
>> We have a reinforced poured concrete basement walls. One wall has a window
>> about 4 feet wide by 40 inches tall in it 2 feet from the top of the wall.
>> The wall is a nominal 10 inches thich. There is no steel over the window.
>> Should there be?
>
>If there is no steel rebar inside the concrete over the window
>opening you are in trouble

Why do you say the above?
I've seen concrete, perhaps a foot or two in height over basement
windows without any rebar or other reinforcements.
It depends a lot on the strength of the concrete mix.
Some of these homes/basements were nearly a century old.

The Romans used concrete (they invented concrete) in aqueducts now
over 2000 years old that still stand. They didn't use steel rebar.

Doug


Posted by Nick Hull on July 22, 2007, 8:35 am

>
> >In article
> >
> >> We have a reinforced poured concrete basement walls. One wall has a
> >> window
> >> about 4 feet wide by 40 inches tall in it 2 feet from the top of the wall.
> >> The wall is a nominal 10 inches thich. There is no steel over the
> >> window.
> >> Should there be?
> >
> >If there is no steel rebar inside the concrete over the window
> >opening you are in trouble
>
> Why do you say the above?
> I've seen concrete, perhaps a foot or two in height over basement
> windows without any rebar or other reinforcements.
> It depends a lot on the strength of the concrete mix.
> Some of these homes/basements were nearly a century old.
>
> The Romans used concrete (they invented concrete) in aqueducts now
> over 2000 years old that still stand. They didn't use steel rebar.

But they used arches and did not leave the top of windows/doors
flat as is the current custom with rebarred concrete

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