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[TowerTalk] guy rod angle

 To: [TowerTalk] guy rod angle w7ni@easystreet.com (Stan or Patricia Griffiths) Wed, 05 Sep 2001 12:30:44 -0700
 ```Mike Rauh wrote: > Hello TT: > > How does Rohn compute the guy rod angle? I tried taking the vector sum of > the guy pretension. That gives an angle that is too low. I didn't consider > sag; if I did, the angle would be even lower. What gives? > > Mike Rauh, NV7X Hi Mike, I didn't see any responses to your question so I will offer one. In general, Rohn does not tell anyone how they calculate anything, unless, of course, your are willing to pay for that service. You might want to ask them directly, but don't hold your breath waiting for the answer . . . There is a page in the latest Rohn Consumer Catalog (page HA80) that discusses guy anchors and some specifications about installing them. It does say that guy rod slope must be within + or - 1 degree but they neglect to tell you within 1 degree of WHAT or how to determine the ideal slope. Even if you knew the ideal slope, how could you measure within 1 degree of it in a typical tower installation? Is it really THAT important . . . ?? I think this is just another Rohn "escape clause" in case your tower comes down and they want to pass the responsibility buck back to the installer . . . but then that is just my personal opinion . . . I just take a look at the situation on paper (neglecting guy wire sag) and estimate the average slope of the guy wires to ground. I install my anchors so the rod slopes at the about the average of the guy wires, as close as I can get it. Has any tower failure EVER been attributed to guy anchor rod slope being off a few degrees? In 48 years of hamming, I have never heard of one. Yes, guys and anchors fail but not because the rod slope is wrong (unless it is WAY WRONG, like vertical elevated anchor posts, and even then, with proper design, you can elevate your anchor points just fine). Stan w7ni@easystreet.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 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 ```
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