[TowerTalk] LM-470 at 100 MPH

[Bob Maser]

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 at ccis.com>
To: <towertalk at 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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