My understanding from a metal cable company is that if you use a thimble on
a guy cable you lose 20% of the strength of the cable at that point. If you
weave the end of the cable you lose 5% of the cable strength. Is this true?
Also, what strength do you lose when using a guy-grip?
[mailto:firstname.lastname@example.org]On Behalf Of Mike Gilmer, N2MG
Sent: Monday, January 06, 2003 08:44
Subject: [Towertalk] Knots for Guys
I would never use a knot in this application. Phillystran is to be
terminated with grips designed specifically for Phillystran.
But why not ask them yourself?
http://www.phillystran.com (almost worthless)
For grips, go to http://www.preformed.com
and look up "Phillystran" in their search tool
Gee, even PLP refers to it as Phillystrand on this search results
page...there is no "D" at the end; they should know better!
And yes, you need turnbuckles - they are mandatory to tighten the
cables to proper tension - especially given that they stretch/relax
73 Mike N2MG
> There was a lot of discussion recently about knots, particularly
> the bowline for making loops and using when the knot would remain
> under tension. I want to use Phillystran to guy a 40 foot aluminum
> tower that I bought, and I'm wondering if I can use bowline knots
> to secure the line around the thimbles. I would definitely secure
> the line ends to the main line (maybe tape them?) and the guys would
> be under constant tension so the bowlines shouldn't slip.
> Secondly, with Phillystran, would I still include a turnbuckle in
> each guy to allow for adjustment, tightening, etc?
> Last, would I have to use an aluminum thimble at the tower so it
> would not be disimilar metals?
> Advice appreciated.... Jerry
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