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Guy wire tensining

C

CaptBob92

I'm looking at building a tower using a Rohn 45. When looking at the guy tensions as displayed on line I'm led to believe they are reccomending 660 to 800 lbs on some levels and over a thousand on the top guys. Is this typical of such tension? Seems awfully high to me. Anybody know about such things? Thanks
 
You did not mention how tall a tower you wish to build, or the wind and ice loads for which you want to budget. I took a quick look at the Rohn book, and for some of those higher-tension lines on 100+ ft towers they are calling for 5/16" EHS (extra high strength) guy wire. 1K lbs tension doesn't seem out of line for that size & strength, but make sure you match the guy wire & tension for the job.

By the way, I never knew that a tension meter was so relatively inexpensive http://www.championradio.com/Loos-Professional-Model-PT-3.19.
 
If you're just checking for a ballpark reading the clamp on type work OK.
Does your insurance cover you if you drop the tower while tensioning it yourself?
 
No direct experience with Rohn myself, but typically if you talk to the tower manufacturer and tell them your requirements (load, wind, ice, soil, lot size, ect) they will put together a package for you with all the correct parts, guys, hardware, how much concrete and rebar for the base, ect. including engineering drawings that you would need to pull a permit. You are going to pull a permit, right? ;) Even if it costs something it will be will worth it.

Of course the next best thing would be to have them put it up, but you should be able to take that bill of materials and engineering drawings to a qualified tower installer and have them put it up for you.
 
I've always heard that the guys should be tensioned at 10% of the breaking strength of the guy wire in question. Can anyone verify that?
 
Usually, but I am sure there are exceptions.
The wires on a 1000 ft tower at one of my stations are. Wires are 3/4" & 7/8" EHS and are indeed tensioned to 10% of breaking.
The same on a 325 ft tower. Wires are 3/8" EHS
 
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