[Towertalk] Guy Wire Assistance

[Pete Smith]

At 04:13 PM 12/24/02 -0500, TNeill1648@aol.com wrote:
>I am putting up 100 feet of Rohn 55 and have a guy wire question.  My
>preference is to use Phyllistrand nonconductive guys and I have no experience
>with this product having always used 3/16 inch steel.
>
>My question is which size of the Phyllistrand to use.   I believe there are
>four different sizes of Phyllistrand available.  The PHTG21001 has a breaking
>strength of 2100 pounds and the HPTG 40001 is rated at 4000 pounds.
>
>The 3/16 inch EHS is rated around 3900 pounds and I have never had a failure
>with this particular guy cable size.
>
>Would the 2100 pound Phyllistrand work OK?

The Rohn drawing I have shows a top guy of 1/4" EHS for 100 ft of Rohn 
55.  That says to me that you need the bigger Phillystran, the one rated 
for 6700 lb.

A factor to keep in mind is that Phillystran stretches about twice as much 
as steel of equivalent breaking strength.  Given that, wouldn't you rather 
go with the stronger Philly and see less stretch (therefore less tower 
movement) under the expected load?

73, Pete N4ZR
Happy Holidays