Obviously true, however the building department won't look
at it that way. They'll want to see an
analysis/certification showing the conditions under which
the structure will meet the wind loading requirements. They
may accept my committment to "keep it cranked down when the
winds are up", but I suspect not. I'll find out soon
enough.
Bob
----- Original Message Follows -----
From: "Bob Maser" <bmaser@tampabay.rr.com>
To: <k6zz@ccis.com>, <towertalk@contesting.com>
Subject: Re: [TowerTalk] LM-470 at 100 MPH
Date: Sun, 30 Nov 2008 02:50:01 -0000
> Anybody that leaves a crankup tower up in 100mph wind
> potential deserves to lose it. I guarantee you that a
> LM470 cranked all the way down will not be blown down in
> any wind. Of course, the elements will be stripped off
> the boom long before, then goes the boom.
>
> Bob W6TR
> ----- Original Message -----
> From: "Bob Selbrede, K6ZZ" <k6zz@ccis.com>
> To: <towertalk@contesting.com>
> Sent: Sunday, November 30, 2008 1:32 AM
> Subject: [TowerTalk] LM-470 at 100 MPH
>
>
> > Hello,
> >
> > Has anyone had the Triex LM-470 professionally evaluated
> > for antenna load capacity in a 100 MPH Basic Wind Speed
> > zone? Turns out our local building code will be changing
> > on 1 Jan 09 to require new structures to meet the 100
> > MPH requirement. I suspect most free standing crankup
> > towers, fully extended, may not handle these wind
> > conditions unloaded let alone with a good size tribander
> > on them. How does an 85 MPH 3 second gust rating of 18
> > Sq Ft look at 100 MPH? I would estimate around 4 Sq Ft.
> >
> > 73, Bob K6ZZ
> >
> > _______________________________________________
> >
> >
> >
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> > TowerTalk@contesting.com
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>
> _______________________________________________
>
>
>
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