[TowerTalk] Fwd: Welding Rebar

[Roger (K8RI) on TT]

On 1/6/2014 12:58 AM, Hans Hammarquist wrote:
> I believe K2TTT put one tower up using nothing as a base, just the tower standing on a small plate, resting directly on ground. Yes, it is (was) guyed.
Over the years (since 61) I've had 7 towers up using dirt bases. They 
were only 40-50' with one 60 footer, and one 90 footer, all guyed.  I 
had a 5L 20M KLM, 6L 15M KLM,(42' booms) and a 7L Wilson 10M Yagi on a 
39' boom. One was 90' with a Cushcraft ATB34  It's a rather rugged dirt 
base and in solid soil, I'd not hesitate to go 90 feet with 25G, but 
avoid those towers that only have the horizontal bracing.   
http://www.rogerhalstead.com/ham_files/Dirt_Base.htm  I'd consult an 
engineer for higher or different soil.  I over guyed the 90 footer which 
was a mistake.  The extra weight and proper tension of the larger steel 
guys put an excessive vertical load on the tower causing the bottom 3 
sections to bell out where they join, requiring a hydraulic jack to get 
them apart.

73

Roger (K8RI)

>
> Dave, am I correct?
>
>
> Hans - N2JFS
>
>


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