The big advantage that poured concrete anchors give you is that they are at
least partially dependent for their effectiveness on sheer dead weight; my
Rohn-spec poured anchors weigh around 2000 lb each. On the other hand, a lotm
of pretty savvy hams have used screw anchors in permanent installations without
73, Pete N4ZR
At 12:08 AM 1/16/2006, k0dan wrote:
>Well from my recently-related tower adventure of some years ago (Rest In
>Peace), this is definitely the case. What perturbs me (and this is all water
>of the damn dam now) is that there were no warnings or other implementation
>notes from either the anchor manufacturer nor the distributor. Interestingly
>they did come with suggestion on how to install, and in what kind of soils,
>but nothing else. Without other experience or guidance the "amateur" just
>goes on his merry way, believing he is doing things right.
>----- Original Message -----
>From: "Phil Camera" <firstname.lastname@example.org>
>Sent: Sunday, January 15, 2006 6:45 PM
>Subject: Re: [TowerTalk] Screw Anchor Question
>> 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
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