Thanks everyone for your emails.
The problem with the AB-577 manual is that it does not contain data of
relevence to a professional engineer. Practically all of the manual
describes how to use it rather than the materials involved in its
manufacture. Does anyone know of a study done with these types of things, or
especially one with regard to wind load? I'd need to be able to provide a
professional engineer with enough documentation to show that my AB-577 with
an improved guy system can survive a 90mph wind gust for 3 seconds.
Thanks,
Michael N3CA
On 4/15/06, Joe - WD0M <WD0M@centurytel.net> wrote:
>
> Hi Michael,
>
> If you don't have the technical manual for the
> mast, here's a reference for the HTML version on line:
>
> http://www.tpub.com/content/antennaandmasts/TM-11-5820-538-12/
>
> You can also order the manual on CD from that web
> site, and others (including eBay). It MAY have
> the technical information you're looking
> for. All I've been able to find thus far is that
> it withstands 75MPH and 1/2 inch of ice.
>
> That antenna support was intended to hold two
> antennas, model AT-903. Here is a link to a photo:
>
>
> http://www.tpub.com/content/antennaandmasts/TM-11-5820-538-12/css/TM-11-5820-538-12_20.htm
>
> If you can find the weight of that antenna, that
> should give you a guideline as to what it will hold.
>
> Tower talk has an archive reference that may help:
>
> http://lists.contesting.com/archives/html/Towertalk/2002-04/msg00723.html
>
> I hope these references help you find what you're looking for.
>
> 73,
> Joe
> WDØM
>
>
> At 11:51 AM 4/15/2006, Jim Lux wrote:
> >At 08:31 AM 4/15/2006, Michael Braun wrote:
> > >Dear TowerTalk subscribers,
> > >
> > >Hi - I'm Michael Braun, N3CA. I am a 17 year old ham and enjoy
> > >contesting as my primary interest.
> > >
> > >About 3 months ago I was lucky enough to procure one of the AB/577 GRC
> > >Military masts from a good friend and we successfully installed it at
> > >48 feet, assuming that a permit would not be required because it is
> > >temporary.
> > >
> > >I am writing to ask if anyone knows any Professional Engineers that
> > >are familiar with the AB/577 GRC 48 foot mast and may have done some
> > >complete engineering studies on it related to wind loading and other
> > >factors, or anyone who has had such studies done for themselves..
> > >While I know that the 6 square feet of antenna I have at the top (48
> > >feet) can be adequality
> > >handled by the mast, I need to prove this to my county.
>
>
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