I'm using Phillystran to hold up 100 feet of Rohn 25
here at K4RO. For the first 7 years I used unbroken
1/4" EHS. Then in late 1997, I changed all of the guy
wires (twelve of them, with a star bracket) to Phillystran.
I don't see much if any difference in stretch between the
two types, once the initial installation is tensioned properly.
I use a Loos guage to measure the tension twice a year, and
I don't see the Philly stretching now after 9 years in the air.
73
-Kirk K4RO
On Mon, May 15, 2006 at 01:41:44AM -0700, Jon M. Knodel wrote:
> Hello all,
>
> Thank you everyone for the help so far. I am back with another question
> though.
>
> It has actually worked out that Phillystran would be cheaper for me to use
> than EHS broken up into +/-11' lengths. I am leaning toward using it but am
> concerned about it's stretch. On K7NV's site (great info on tower design and
> loading), he runs one scenario (using Grape software) where the tower
> actually failed due to the Phillystran stretching too much. Granted, this
> was on a 100' R45 and my installation would be a 60' R25 but it still
> concerns me. Do you think it would be possible for the Philly to cause a
> failure? If so, would it be solved by increased initial tensioning (say 15%
> or maybe even 20% as compared to 10%)? Any help would definitely be
> appreciated. Thanks.
>
> 73 es gud DX!,
>
> Jon, N7XW
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