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@contesting.com] On Behalf Of David
Gilbert
Sent: Sunday, September 16, 2012 4:20 PM
To: towertalk@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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