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## [TowerTalk] Tower Guying when the 3 guy points and the tower base are no

 To: [TowerTalk] Tower Guying when the 3 guy points and the tower base are not at the same elevation "Scott Dickson, W5WZ" W5WZ@arrl.net Sun, 10 Aug 2008 18:42:06 -0500 mailto:towertalk@contesting.com>
 ```I have a question regarding computing guy tensions for an installation where the 3 guy points and the tower base are not at the same elevation. My guy posts are large I-beams that protrude 3.5 feet above ground level. The referenced elevations are to the actual points on the I-beam where the guy wires will attach. I used my bubble level (transit) to establish elevations. Tower Base = 0 inches W guy point = +68 inches relative to tower base, at a distance from tower base of 88 feet SE guy point = +19 inches relative to tower base, at a distance from tower base of 97 feet NE guy point = - 48 inches relative to tower base, at a distance from tower base of 113 feet Using a tower guy point at + 100 feet (arbitrarily chosen for calculations), I calculate the following angles, which are close but vary from guy post to guy post W = 47 degree angle with ground SE = 45 degree angle with ground NE = 43 degree angle with ground I suppose I know just enough to be dangerous here. From physics classes long ago, I believe that since the guy wire angles are different, it stands to reason the tension in the wires needs to be different, because of the vertical and horizontal components of the guy wire. However, I do not remember those calculations. Before I go dig the formulas up, assuming my angle calculations are correct, my question is simply: Is there enough variance to matter? Is there a "ready reference" anywhere for these calculations? --Scott, W5WZ _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinfo/towertalk ```
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