Towertalk
[Top] [All Lists]

Re: [TowerTalk] LM-470 at 100 MPH

To: towertalk@contesting.com, k6zz@ccis.com
Subject: Re: [TowerTalk] LM-470 at 100 MPH
From: K7LXC@aol.com
Date: Mon, 1 Dec 2008 15:24:45 EST
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
 
In a message dated 11/30/2008 5:23:02 P.M. Pacific Standard Time, K7LXC  
writes:

>  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.
 
    IMO you're toast. A crank-up will probably  survive if it's cranked down 
but a stock LM-470 ain't even close. Maybe your  engineer can find a extended 
height that'll work but it won't be very high.  

Cheers,
Steve     K7LXC
TOWER TECH -
Professional tower services for hams



 
**************Life should be easier. So should your homepage. Try the NEW 
AOL.com. 
(http://www.aol.com/?optin=new-dp&icid=aolcom40vanity&ncid=emlcntaolcom00000002)
_______________________________________________



_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk

<Prev in Thread] Current Thread [Next in Thread>