You poured to Rohn Specs? Rohn does not spec that kind of
soil, which is far from what Rohn does spec - "Normal Soil".
I can't even imagine building a tower in an old river bed, with
5 feet of spongy soil, without having a local engineer involved.
----- Original Message -----
From: "Pete Smith" <firstname.lastname@example.org>
Sent: Monday, January 16, 2006 7:43 AM
Subject: [TowerTalk] Speaking of structure issues
>I was out working at the base of my tower yesterday (97 feet of Rohn 25),
>and was surprised to discover that the base concrete block - poured to Rohn
>specs - is visibly tilted. Because I have a pier pin base, this isn't a
>big concern - the hole in the base for the pier pin is more than large
>enough to handle the misalignment - but I was wondering what would have
>happened if I had used a rigid embedded base section. Maybe the concrete
>block wouldn't have tilted.
> The tower is in an old river bed, with about 5 feet of spongy topsoil, and
> it gets pretty squishy nearby in the spring. Fortunately, a guyed tower
> base isn't called on to take much but vertical loads.
> 73, Pete N4ZR
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