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engineered cinder block walls peterjgibson 09-28-2006
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Posted by on September 28, 2006, 11:21 pm
Greetings! I've been searching the web to try to find how does one
build a n engineered cinder block wall for a shop. Here is the
confusion, I've never done it before. The county I live in wants me to
start with 12" wide blocks for the first couple of layers, then use 8"
block for the mid and top layers. How do I go about putting in rebar to
make sure it will go through both blocks with the different width?
Where can I find an illustration? Part of the wall will be 6 ' high and
another section will be 8' high. It will be used as soil retaining and
is also for a shop addition. I greatly appreciate any information,
suggestions and ideas. Thanks
Pete


Posted by AndyS on September 29, 2006, 7:48 am

peterjgibson@sbcglobal.net wrote:
> Greetings! I've been searching the web to try to find how does one
> build a n engineered cinder block wall for a shop. Here is the
> confusion, I've never done it before. The county I live in wants me to
> start with 12" wide blocks for the first couple of layers, then use 8"
> block for the mid and top layers. How do I go about putting in rebar to
> make sure it will go through both blocks with the different width?
> Where can I find an illustration? Part of the wall will be 6 ' high and
> another section will be 8' high. It will be used as soil retaining and
> is also for a shop addition. I greatly appreciate any information,
> suggestions and ideas. Thanks
> Pete

Andy comments

This could get tricky. The soil retaining wall will have a lot of
horizontal pressure and may need the rebar and concrete filler.
The shop wall will have mostly downward pressure and doesn't
need to be as "solid". So it depends on how high the soild retaining
wall is and whether the shop wall is being built on top of it........

If you put drainage pipe on the "soil side" and use gravel as
backfill,
there will be a lot less pressure, assuming you can find a place to run
the drainage off to..... Also, the wall will probably leak, and may get

your shop wet.....

So, you see, your question can get complicated...

Here's an idea: Excavate about two feet back from the shop
wall, and there put a second, lower wall for your soil retention.
That till give you easier specs for each wall, and a place to
store your lawnmower and pictures of your mother-in-law.
Drainage will be easier, also, tho you might have a small
moat after a rain, but, heck, you can stock it with fish......

Andy in Eureka, Texas


Posted by on September 29, 2006, 10:47 am

AndyS wrote:
> peterjgibson@sbcglobal.net wrote:
> > Greetings! I've been searching the web to try to find how does one
> > build a n engineered cinder block wall for a shop. Here is the
> > confusion, I've never done it before. The county I live in wants me to
> > start with 12" wide blocks for the first couple of layers, then use 8"
> > block for the mid and top layers. How do I go about putting in rebar to
> > make sure it will go through both blocks with the different width?
> > Where can I find an illustration? Part of the wall will be 6 ' high and
> > another section will be 8' high. It will be used as soil retaining and
> > is also for a shop addition. I greatly appreciate any information,
> > suggestions and ideas. Thanks
> > Pete
>
> Andy comments
>
> This could get tricky. The soil retaining wall will have a lot of
> horizontal pressure and may need the rebar and concrete filler.
> The shop wall will have mostly downward pressure and doesn't
> need to be as "solid". So it depends on how high the soild retaining
> wall is and whether the shop wall is being built on top of it........
>
Andy Thanks for the reply. I did forget to mention that this wall will
have both rebar and be filled with cement as per county approved plans
that were engineered. I'm assuming that they know about the pressures
as you are and mentioned.


Posted by Bob Morrison on September 29, 2006, 10:35 am
In a previous post peterjgibson@sbcglobal.net wrote...
> Greetings! I've been searching the web to try to find how does one
> build a n engineered cinder block wall for a shop. Here is the
> confusion, I've never done it before. The county I live in wants me to
> start with 12" wide blocks for the first couple of layers, then use 8"
> block for the mid and top layers. How do I go about putting in rebar to
> make sure it will go through both blocks with the different width?
> Where can I find an illustration? Part of the wall will be 6 ' high and
> another section will be 8' high. It will be used as soil retaining and
> is also for a shop addition. I greatly appreciate any information,
> suggestions and ideas. Thanks
>

The simplest thing would be to have an engineer design the wall with the
necessary details. Then the county will have very little to complain
about.

--
Bob Morrison, PE, SE
R L Morrison Engineering Co
Structural & Civil Engineering
Poulsbo WA
bob at rlmorrisonengr dot com

Posted by on September 29, 2006, 10:43 am

Bob Morrison wrote:
> In a previous post peterjgibson@sbcglobal.net wrote...
> > Greetings! I've been searching the web to try to find how does one
> > build an engineered cinder block wall for a shop. Here is the
> > confusion, I've never done it before. The county I live in wants me to
> > start with 12" wide blocks for the first couple of layers, then use 8"
> > block for the mid and top layers. How do I go about putting in rebar to
> > make sure it will go through both blocks with the different width?
> > Where can I find an illustration? Part of the wall will be 6 ' high and
> > another section will be 8' high. It will be used as soil retaining and
> > is also for a shop addition. I greatly appreciate any information,
> > suggestions and ideas. Thanks
> >
>
> The simplest thing would be to have an engineer design the wall with the
> necessary details. Then the county will have very little to complain
> about.
>
Thanks Bob. It actually is an engineered, county approved wall that is
requiring me to start with the 12" wide and then going to 8" wide block
towards the top. It will also be filled with cement and rebar. I not
sure how to place the rebar or the placement of the 8" block on top of
the 12" block at the trancition?
> --
> Bob Morrison, PE, SE
> R L Morrison Engineering Co
> Structural & Civil Engineering
> Poulsbo WA
> bob at rlmorrisonengr dot com


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