Roger,
Congratulations on your planned new tower!
Use the guy wire specified in the Rohn drawings and tension it to 10% of
breaking strength. If tension is less than approximately 8 percent, the guy
wire may gallop in the wind, increasing the stresses on your tower. If you
tension it more than approximately 15 percent, you will reduce the rated load
of your tower.
I'm surprised you had corrosion problems after only 10 years. Perhaps you live
in an industrial area. Galvanized EHS cable should have a 20 year life in a
non-corrosive environment. I do not recommend coating the wire, if the
coating traps any moisture it will reduce the life of the cable, and the
deterioration may not be visible to inspection.
73!
Frank
W3LPL
---- Original message ----
>Date: Sun, 31 Dec 2006 18:50:12 -0500
>From: "Roger Kissel" <kc8hz@hotmail.com>
>Subject: [TowerTalk] New tower info request
>To: towertalk@contesting.com
>
>Hi all
>
>I'm planning to put up a new tower for HF and even tho I've done this
>before, I have never gone as high as I plan to go this time. All towers in
>the past have been under a hundred feet. I plan to go 150 this time.
>
>I will be using 45 and guy it at the heights recommended by Rohn. However, I
>haven't been able to find recommended or approved guy tensions. I understand
>equal tensions and making sure the tower is straight all the way up. I also
>know that there will be a certain amount of 'sag' in the guys. However, I
>haven't been able to find out how much pull I should have on the guys.
>
>Is there a correct pull ?
>
>I do know that guys should not be tensioned to more than 10% of their UBS.
>However, this doesn't mean that if I go to a larger cable, I will
>automatically pull harder.
>
>Any ideas ?
>
>Roger
>KC8HZ
>
>_________________________________________________________________
>Fixing up the home? Live Search can help
>http://imagine-windowslive.com/search/kits/default.aspx?kit=improve&locale=en-US&source=hmemailtaglinenov06&FORM=WLMTAG
>
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73!
Frank
W3LPL
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