If my feeble memory serves me, I'm in an 80 Mph zone. In the past year
alone, we have had two occasions of officially recorded straight-line blasts
of over 90 mph (recorded at the airport about 4 miles east of me). The last
one took down a dozen or so very large trees around my place, and ripped out
about 100 feet of split rail fence. So charts be damned, I built my recently
erected guyed R45 to Rohn's 110 mph specs. Total added cost to get from 80
to 110, as far as I can figure, is about $75 worth of extra concrete, some
extra sweat in digging larger anchor holes, and an added $100 or so more to
buy 4130N mast material vice something a little more bendable. I'd go for
the overkill on the wind speed rating, and give up a little tower height to
do it if necessary. You'll sleep better at night, I promise.
73, Jerry W5KP
----- Original Message -----
From: Gary B <blueis@sprintmail.com>
To: <TowerTalk@contesting.com>
Sent: Monday, September 10, 2001 11:50 AM
Subject: [TowerTalk] Paranoid vs. Overkill
>
> TowerTalkians...
>
> My question is simple. I live in a "70 mph" wind zone according to what I
> can determine. Can I SAFELY use the 70 mph figure or should I build in
> additional capacity by purchasing a stronger tower? Using a 'lower spec'
> Trylon tower (eg, T400 vs. T600) means getting a taller tower at
> approximately the same price. (Remember: size does matter!) What would
> you recommend? How reliable are the 'wind speed' tables? Do I stand a
> *reasonable* chance of long service and no tower failure using the 70 mph
> figure? Or does this all boil down to how lucky I feel?!?
>
> The more I read, the less likely it is that I can make a decision!
>
> Tnx
>
> Gary B
> k3gb
> RVN BTO
>
>
>
> List Sponsored by AN Wireless: AN Wireless handles Rohn tower systems,
> Trylon Titan towers, coax, hardline and more. Also check out our self
> supporting towers up to 96 feet for under $1500!!
http://www.anwireless.com
>
> -----
> FAQ on WWW: http://www.contesting.com/FAQ/towertalk
> Submissions: towertalk@contesting.com
> Administrative requests: towertalk-REQUEST@contesting.com
> Problems: owner-towertalk@contesting.com
>
>
List Sponsored by AN Wireless: AN Wireless handles Rohn tower systems,
Trylon Titan towers, coax, hardline and more. Also check out our self
supporting towers up to 100 feet for under $1500!! http://www.anwireless.com
-----
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
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Problems: owner-towertalk@contesting.com
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