[TowerTalk] Screw Anchor Question

[Jim Lux]

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.