on 9/3/02 11:57 PM, K7LXC@aol.com at K7LXC@aol.com wrote:
> Fifty-feet of 25G has 2 sets of guys; the maximum guywire strength at the
> anchor before failure is 8,000 pounds. This is SIGNIFICANTLY more than the
> capacity of the screw-in anchors. Even if you used one screw-in per guy,
> you'd still have a mismatch. I'll sure someone will mention screw-in creep
> due to wet soil conditions.
Where did you get the 8000 pound number? The specs on 3/16" guy wire from
Rohn are 3990 pound breaking strength. 1/4" guy wire has 6650 pound
strength and 5/16 guy wire has 11,200 pounds strength.
So while the screw in anchor is rated at 2500 pounds, that's a lot closer to
the breaking strength of the guy wire which is less than half of what you
said. Or where you combining both sets of guys?
I would be more worried about screw creep with wet soil than I am about the
amount of force on the guy wires.
So far I've gotten a variety of answers just as I thought. There is no
consensus on this issue. I guess if they just don't work, why would Rohn
make them! I'm still not sold one way or the other although my time for
putting in concrete is running out before my tower assembling get together.
So now I have another question: How much tension does one tighten the guy
wires to?
73,
Jon
NA9D
-------------------------------------
Jon Ogden
NA9D (ex: KE9NA)
Life Member: ARRL, NRA
Member: AMSAT, DXCC
http://www.qsl.net/ke9na
"A life lived in fear is a life half lived."
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