I used earth screw anchors on my 50 foot tower in
Alaska, which stood up to 125 mph winds and heavy
snow and ice loads with no problems. We lived
right on the coast and were subject to lots of
heavy storms coming in off the Gulf. Never had a
problem in the almost 10 years it was
there. When we moved, it was a bear trying to
get the earth screws out. May not work in sandy
or other soft soils, but it sure worked well for me.
At 08:55 PM 1/15/2006, Jim Lux wrote:
>At 04:45 PM 1/15/2006, Phil Camera wrote:
> >Don't take this personally, but IMHO screw anchors are only to be used
> >for a temporary installation.
> >A 70 ft. tower is a sizable structure and needs adequate anchors,
> >meaning, anchors that have concrete holding them in place.
> >Yes, you should be concerned about the anchor in question, as well as
> >the others.
> >If you get Zero rain, and I mean none, then your anchors may last. But,
> >if your location gets any kind of rain, then that soil can become very
> >soupy and won't hold worth squat.
> >I'd seriously rethink your installation. Gd Luck and be safe, Phil KB9CRY
>Properly selected and installed screw anchors are a suitable long term
>solution. They're used to anchor utility poles, for instance. However,
>like many things, they DO require appropriate engineering. It's not just a
>big old hunk of concrete in the ground with a bolt sticking out of it.
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