http://www.flickr.com/photos/11829197@N06/3291969262/ This is what happens when a wind storm topples a tree that clips a guy wire of a 100' tower on the way down. Happened at the Skyview Radio Societ
Hmmm, Doesn't look like that tower was spec'd to go 100ft, esp. with the number of antennas attached. Better Luck Next Time, wa3gin _______________________________________________ ___________________
Tower had been up a long time. Would still be there if the guy wire hadn't been compromised. It was an old tower - probably as old as the club itself and we're celebrating our 50th anniversary this y
Yup...I know. I took down 100ft of Rohn 25 for an old timer. He had a pair of stacked 8 element 2m beams on top and under them a Cushcraft A3. The tower was guided with aluminum ground wire at the 75
Good old "American Steel" towers. They were built to support a TV antenna. OTOH I've had them up to 90' holding a TH3, or ATB34, plus a Shakespear 2-meter repeater antenna on top of a dirt base for 2
I don't agree - my Rohn 25 would almost certainly fold just like that, above the second guy station, if the wrong top guy failed in a high wind, and it is well within ratings. 73, Pete N4ZR _________
I think you need to consider the tremendous force placed on the subject guy wire when the tree hits it - even before the guy breaks, and then I would figure there would be some backlash after it brea
When that tower was put up, it met all the specs of HamSpec 101.1. You know, when the 4 oldest guys in the club gather around the tower, give it a shake, and say ..."looks OK to me"... . 73, Dick, W1
One of the things that happens in a case like this is an "oscillation" begins to occur with the tower once a guy has been compromised or even if it is just hit hard enough to cause some backlash. Pre
If you've ever seen the ROHN add showing the weights applied to two towers demonstrating the lateral strength, your 25G is also considerably stronger than the old American Steel towers in the lateral
I wasn't suggesting that the old tower wasn't less strong than Rohn 25. My point was that with a guy gone, or alternatively with it having been pulled on by a falling tree, in 70 mph+ gusts I'd expec
I had a stick of 120' of Rohn 25 guyed every 30' up with Philly. A large, previously thought healthy maple went to ground due to wind & rain. The maple took out the eastern guys at 30' and 60'. The t