Very interesting... my expensive failure-modes-and-effects testing began the
same way - a failed eyebolt at the bottom end of a guy wire.
I have developed a phobia over drop forged eyebolts and turnbuckles over the
years. I still use them, but I also jump across them with a 'safety wire'
that is cable clamped to the guy ahead of the turnbuckle and wraps around
the back of the guy post. The next time I lose something drop forged it
won't cost me the tower..
Hal
N4GG
>And I used the same experiment to demonstrate that SS bolts shear. I still
>have the bolts.
>The failure point, BTW, was a drop forged eyebolt bolted into a concrete
>parapet horizontally, with the guy pulling upward on it (i.e. laterally)
>(max angle on the Rohn drawings). When the tower went down, a few of the
SS
>bolts sheared. Note that it was not the SS bolts in the tower joints
>shearing that made the tower fall.
>Mark, N5OT
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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