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## Guy Line Tension

 To: Guy Line Tension kb5ylg@why.net (kb5ylg) Mon, 16 Dec 1996 12:45:50 -0600
 ```I think the problem can be approached using Pythagoreans Theorem and = force vectors.... a|\ c |_\ b a^2+b^2=3Dc^2 Shrinking the ac angle (making steeper) causes b (lateral force) to = shrink. To equalize b (lateral force) with other runs of shallower = angle, and a (vertical force) being constant, then c (tension on guy = wire) must be increased. David Johnson KB5YLG ---------- From: Roger L. Elowitz[SMTP:K2JAS@worldnet.att.net] Sent: Sunday, December 15, 1996 8:15 PM To: towertalk@contesting.com Subject: Guy Line Tension Hi Guys, I know that this just might sound a bit silly with all you big guns and = tall towers but... who better to turn to for advice? I just put up a 3-section (9-ft ea) push up mast on the top of my garage with the lowest section bracketed to the side of the house for just = about it's full 9-foot length. The second and third sections are guyed in = three directions with 1/8th inch diamond braid dacron Kevlar core line that is supposed to be rated at 450# tensile strength. On the top of the mast is a Ham-M rotor, a Cushcraft A-144-11 2m beam, = about 4 feet above that is a 23-el ATV beam and way above that (about 8-ft) is = an AEA isopole for two meters. Now the question I have has to do with guy line tension. My friend, who = is an Industrial Arts teacher and who helped me install the set-up, says = that the guy lines which run down to the garage roof at a steeper angle than = the guys to the house roof- need a greater amount of tension to keep the = mast vertical. This he claims is because of the shallower angle naturally requires more tension. Well, I have a bad track record when it comes to doubting people, = (BETTER stainless IS NOT MAGNETIC) but, I had the opinion that the angle of the = guy to the tower should make NO DIFFERENCE when it comes to tensioning them = and that I should aim for equal tension in all the lines. To be on the safe side..... I left the guys with the steeper angle much tighter than the others. Of course, I don't have a tension gauge so I = really have no idea if I am anywhere near the maximum rating on this guy = material. I do know that the mast is as vertical as I can possibly make it. Your thoughts on this subject- on the reflector, would be much = appreciated as perhaps this subject applies equally to guying any structure with any material. Thanks all, Roger, (easily snookered) K2JAS =20 =20 -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administrative requests: towertalk-REQUEST@contesting.com Problems: K7LXC@contesting.com Sponsored by Akorn Access, Inc & KM9P -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administrative requests: towertalk-REQUEST@contesting.com Problems: K7LXC@contesting.com Sponsored by Akorn Access, Inc & KM9P ```
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