[TowerTalk] Guy Angles for my Small Property

[Jason Dugas]

Hello to the Group,

I got as far as actually having manufactured my guy anchors and then realized that I was going to have MAJOR trouble getting all my guy wires to fit on my property.  I have read with interest the discussions concerning varying distances from tower base to guy anchors, and I just didn't want to get into all that with my set up.

So I got on Excel and developed a set of equations which fully describes the guy lengths and angles based on an initial position of the first guy & assuming that all other guys are spaced 120 degrees from the other.

What I came up with was still a little outside of the Rohn spec, but I wanted to pose it to the group for comments.  Essentially, for a 50 foot tower (my tower height), Rohn does use the 80% rule with respect to the ratio of distance from the base to height of the tower.

Basically, mine has been cut down to the 60% range.  Just curious if others use the 60% ratio and if that would be acceptable.  I would be happy to say good bye to my tower in 80mph winds, but I'd like it to stand up in 30 or 40 mph gusts!!

Also, at what angle & tensions do I have to start worrying about actually collapsing the tower due to excessively low ratios?  What are my tradeoffs, assuming I actually have my 120-degree spacing between anchors?

Thanks,

Jason
KB5URQ