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## [TowerTalk] Rohn 25 guy radius oddness.. 80% vs 50%?

 To: [TowerTalk] Rohn 25 guy radius oddness.. 80% vs 50%? Hank.Lonberg@Harrisgrp.com (Lonberg, Hank) Thu, 18 Nov 1999 09:04:39 -0800
 ```Gerald: Actually I don't think any of it is attributed to the fact it is 4-way guyed. A design condition would be with the wind load in line with one of the guys. In this case one guy is taking all the load and the other three are not. It is the same as my other response. The use of 4way guying allows for easier tilt over for the tower in lieu of 3-way. Always have the side guys helping to control the side to side direction of the tilt over. Again it shows that you can place the guy anchor points at some distance other than 80% of the height. You just need to calculate all the forces and design for what they are. Hank Lonberg, P.E. / KR7X Beaverton, OR USA Kr7x@arrl.net Hank.Lonberg@harrisgrp.com Team Pantelleria - IH9P - African Italy - CQWW DX SSB http://www.qsl.net/ih9p/ -----Original Message----- From: TexasRF@aol.com [SMTP:TexasRF@aol.com] Sent: Thursday, November 18, 1999 8:25 AM To: towertalk@contesting.com Subject: Re: [TowerTalk] Rohn 25 guy radius oddness.. 80% vs 50%? Another perspective on this question: If you examine the guying specs for a Rohn 48ft Foldover tower model FK2548 ypu will find a recommended guy distance of only 18 feet, or 37.5 percent of the tower height! This is with a wind load of 13.3 square feet as well. The guy plan is for a four way guy system. Perhaps someone can shed some light on how much of this shortened guy plan can be attributed to a four way versus three way guy plan. It makes sense to me that a standard (non foldover) 25G tower could be used with the four way shortened guy system just as safely as a foldover tower. Anyone else have any thoughts about this? 73 de Gerald Williamson, K5GW -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administrative requests: towertalk-REQUEST@contesting.com Problems: owner-towertalk@contesting.com Search: http://www.contesting.com/km9p/search.htm -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administrative requests: towertalk-REQUEST@contesting.com Problems: owner-towertalk@contesting.com Search: http://www.contesting.com/km9p/search.htm ```