[TowerTalk] [Bulk] Phillystrand.

[Grant Saviers]

Most of what you need to know is at

http://phillystran.com/product-catalog/HPTG-I-High-Performance-Commercial-Broadcast-Tower-Antenna-Guy-Lines
and
http://phillystran.com/Resource_/PageResource/165.pdf

To answer your question specifically, the nominal elastic modulus 
(stress/strain) is 14E6 for the 4000 to 35000# rated Philly.  I'm pretty 
sure that "nominal" (also called "effective") means that the compression 
and elongation with tension of the stranded Kevlar fiber core is in that 
value, since the raw Kevlar fiber modulus is higher (16.3E6).

it is recommended to pretension Philly guys initially at 15% of breaking 
strength and they will relax to close to 10% in about a day.   At a 
tension of around 60% of breaking strength, Philly as well as EHS,  will 
take a small permanent stretch (1 - 2%).  Most smaller tower guys use 
the HPTG6700i which is equivalent to 1/4" EHS.  I think it is commonly 
believed that EHS stretches a lot less than Philly, but several 
references put the "effective" modulus at 0.4 to 0.7 of the actual steel 
cross section for a twisted cable. That makes the difference more in the 
25% range although I have not been able to find specific data for 1x7 
EHS.  Most references state that you have to test the actual cable to 
determine the effective modulus.

You must use guy grips made for Philly and install them properly. Wire 
rope saddle clamps are not to be used for any size but the 1200 Philly, 
which I won't use because guy grips aren't made for that size.

There is a huge amount of information about towers and guying also at  
http://w4zt.com/n1lo/towers1.txt

Grant KZ1W



10/20/2015 10:09 AM, GMuller885--- via TowerTalk wrote:
> Folks:
>     I have a Mosley MP-33 with WARC (10-12-15-17-20). I have added  a Mosley
> 40 to it. Mosley sent tar rope for the guy and stays. I want to replace  it
> with Phillystrand. What I need to know is what is the stretch factor of
> Phillystrand? Can any one help wit this. Please respond.
>   
> Gerald Muller K9GEM
> GMuller885 at aol.com
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>