My post shown below was in response K8RI's post regarding nylon rope.
K8RI stated he had severe stretching in 24 hours when using nylon rope to
support a vertical antenna. I said nothing in my post about using nylon
rope for temporary tower guys. Actually for my pier pin installation, I
immediately installed the permanent guy wires after lifting the tower into
position with a crane. In the tower guy example K8RI described below, the
nylon rope would only stretch 10-15 feet if the temporary guy had zero
tension and then was subject to a 30% load (about 1200 pounds for 1/2"
rope). This is a huge load change! The original post by K7LXC
suggested a way to pre-tension the temporary guy ropes to minimize this
Nylon is resistant to sunlight damage.
Subject: Re: [TowerTalk] Temporary guys
From: K8RI on TT <email@example.com>
Date: Sun, 03 Apr 2011 13:36:13 -0400
On 4/3/2011 10:32 AM, firstname.lastname@example.org wrote:
> I use nylon rope all the time for tower work and for supporting temporary
> antennas and I have never seen the stretch that you describe Roger.
> Actually I like a little stretch when installing large antennas as it
> for a little height adjustment while on the tower. According to the
> internet, nylon rope stretched 10-15% when under a load equal to 30% of
> breaking strength.
I don't think I'd want to be on a tower with temp guys that could easily
move 10-15 feet with a 100 foot guy line length. <:-))
Dacron and other synthetics give a little, but are far more stable than
Nylon which also deteriorates quickly in direct sunlight. I don't think
you'll find Nylon used by riggers very often.
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