It depends on the wire (size, length, composition, and the tension. I
used to regularly climb a 200' commercial tower that had 1" wire rope
for guys. there was an 18" tall, guy attachment point (don't remember
the height) Those guys would ring like a tuning fork when struck with
with a metal tool. it was way above 440
Hz. That kind of vibration will unscrew a lot of hardware, but not with
that kind of tension. The tower was a very solid 2' on a side in 20'
sections, down onto an elevated pier pin base. The elevated base was a
good 6' on a side. The pier pin was about 7' to 8' above ground. I have
no idea as to how deep the concrete went.
Turnbuckles on 1" guys are BIG!
73, Roger (K8RI)
On 9/22/2017 Friday 8:04 PM, Steve Maki wrote:
On 9/22/2017 19:36 PM, Grant Saviers wrote:
At the specified torque values for structural bolts, the fastener is
far less likely to loosen. That isn't the static load in a turnbuckle
which is exposed to many of the conditions that cause common
fasteners to loosen.
You would think so. But guy wires (and turnbuckles) seem to be under a
different dynamic situation than nuts and bolts in a motor for
example. Vibrations are relatively slow, and tension never nears zero
in a system with proper pre-tension. I think.
-Steve K8LX
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73
Roger (K8RI)
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