[TowerTalk] AN Wireless tower

[David Gilbert]

That's kind of a silly extrapolation, don't you think?  We're talking 
"moisture" here, not volumes of water.  What was the point of that 
comment???  As a P.E., do you seriously think that concrete is indeed 
not porous to moisture?  Why do you think that all building codes 
require treated wood for wood that is in permanent contact with concrete 
floors (i.e., plates at the bottom of frame walls)??  In case someone 
spills water on the floor?  Nope ... it's because moisture can propagate 
through a concrete slab from the ground beneath it.

Dave   AB7E



On 9/16/2012 6:45 PM, KR7X wrote:
> In that case you had better tell all those concrete dams that have been
> built that they should not be holding back those reservoirs as they do.
>
> Regards
> Lonberg Design Group, Ltd.
> H. Lonberg, P.E.,S.E.
> Principal
>
>
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of David
> Gilbert
> Sent: Sunday, September 16, 2012 4:20 PM
> To: towertalk at contesting.com
> Subject: Re: [TowerTalk] AN Wireless tower
>
>
> Sorry, but that's an old wives tale.  Concrete itself is porous as hell and
> will pass moisture almost as easily as any cinder block. There is no way on
> this earth that concrete will keep moisture away from the iron, but the
> alkalinity of the concrete will indeed keep the iron from rusting and that's
> why our bridges hold together and our towers don't fall over.
>
> 73,
> Dave   AB7E
>
> p.s.  The specs for my tower called for 16 yards of concrete (9' by 9'
> by 5' deep), but it was impossible to carve a hole with straight sides into
> this rocky hillside so I ended up with over 20 yards myself.
>
>
> On 9/16/2012 4:02 PM, Edwin Karl wrote:
>> Do NOT use cinder blocks or red brick to support iron for the pour
>> Use concrete material, block pieces, curb stop etc. The purpose
>> is to keep moisture away from the iron. Cinder and red brick pass the
>> moisture through.
>> At least that's what we were told in the before time when I worked
>> as an iron worker.
>> I have an HD-90, it's a tough tower. The base got away from me
>> and we used 22 yds of concrete. It ain't going nowhere.
>>
>> 73
>> ed K0KL
>> _______________________________________________
>>
>>
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