The numerous replies I received to the below post were EXTRAORDINARILY
informative and helpful.
Sincere thanks to each of you who took the time to reply, and I apologize to
those of you who had to recall some very painful memories when describing the
disastrous results you experienced when limbs or trees fell on your guys.
I had actually expected to receive some replies stating that small limbs would
probably just bounce off the guys. But I got no such replies, and was
surprised by the large number of you who have suffered this type of damage at
the hands of mother nature.
As a result of your replies, I have decided to move one planned tower to a
place where falling limbs shouldn't be an issue (since cutting down the
offending trees was not an option), and I have decided to make the other
planned tower freestanding to avoid the problem entirely.
So you have potentially saved me untold disappointment and repair costs.
Thank you all very much,
Subject: Force required on guys to cause catastrophic failure? Have your guys
been struck by falling limbs?
Date: Fri, 2 Dec 2011 04:29:20 -0800
This is a two-part question. There is a small survey at the end for those who
have had a guy struck by a falling limb or tree.
My main question is: Are there any engineers out there who can tell me how to
calculate the downward force on a guy that would cause a breakage or
On a practical level, I'm sure there must be some of you who have had limbs
fall on guys. I'm interested to hear:
What size/weight of limb hit the guy?
What was the tower configuration (height, type, and guy material)?
Which guy got struck?
How far did the limb fall?
What was the result? Damage or no damage?
Thanks for all input,
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