Hello Ron:
I think you are making a good choice with Phillystran for your tower
installation. It is critical you follow all of the Phillystran manufacture
instructions when you install it. The EHS comparison chart is very accurate.
There is no reason to install larger sizes, however- you should install what
the tower manufacture specifies for the installation you have. That is
critical. If it is not in print for your tower, please contact them and get
their engineering guidance. There is no reason to guess and there are no rules
of thumb's when dealing with these installations. Your life depends on it!
There are engineered solutions by the manufacture and you must follow those
instructions 100%. Do it right!
Use qualified professionals to install your tower, accidents happen (several
this year already) and you do not want anything bad to happen to you or your
friends.
Good Luck and be safe!
73
Tim K3LR
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Ron WV4P
Sent: Sunday, September 8, 2019 12:02 PM
To: Wayne Kline
Cc: Tim Duffy; towertalk; jz73@verizon.net
Subject: Re: [TowerTalk] Polygon Guy Rods
Thanks for the great replies !
I reckon I will err on the side of caution and use Phillystran.
For the folks using it, do you go by the EHS Comparison chart ? ie: The
HPTG4000I replaces 3/16 EHS and the HPTG6700Ireplaces 1/4"
Or is there a rule of thumb to Upsize ? What size are most using on
Rotating towers ? Thanks again, Ron, WV4P
On Fri, 6 Sep 2019 at 13:41, Wayne Kline <w3ea@hotmail.com> wrote:
> John,
>
>
>
> IMHO PhillyStran has it’s place in tower installations BUT you must
> consider the site for abrasion. It and polyrod will fail in that
> invroment.
>
>
>
> Even EHS 3/16 , ¼ and 5/16 will fail under fallen tree /limb contact…
> Ask BGN or IPK At IPK’s QTH the PLP 1/4 “ guy grip was still wrapped
> around the ROHN thimble BUT the EHS was pulled out and upon examining the
> EHS the wrap twist was no longer that but pulled almost straight . Yes it
> was a BIG tree 36” dia oak and contacted the top layer of guys mid way ,
> snapping two legs of the R-25 ay 50 ft resulting in crushing the one
> intact leg down ( read wrinkles in the crushed leg then bending it 160
> DEG. Down. And the rest of the tower resting at a 60 deg angle. I assume
> this is a worse case senero Tees and towers do not MIX
>
>
>
> Wayne W3EA
>
>
>
> PS yes we cut the remaining guys and let the tower fall with the weight
> of the tree bolt cutters to the rescue
>
>
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
>
> ------------------------------
> *From:* TowerTalk <towertalk-bounces@contesting.com> on behalf of Jon
> Zaimes via TowerTalk <towertalk@contesting.com>
> *Sent:* Friday, September 6, 2019 1:57:44 PM
> *To:* 'Tim Duffy' <k3lr@k3lr.com>; 'Ron WV4P' <wv4ptn@gmail.com>;
> 'towertalk' <TowerTalk@contesting.com>
> *Subject:* Re: [TowerTalk] Polygon Guy Rods
>
> I had my first Phillystran failure here not long ago. It was one of the
> guys
> on my 160-meter (K3LR array!) vertical driven element, and broke when a
> loblolly pine limb fell on it. The limb, which broke off and fell about 10
> feet to hit the guy, later was weighed at about 100 pounds. The Philly had
> been purchased in 1978 and used at four different QTH's over its 41 year
> life. Phillystran's website says lifespan is 25 or more years; so maybe
> practical lifespan is somewhere in between those numbers. Maybe even a new
> piece would break if such a limb hit it.
>
> Phillystran also is susceptible to chafing if tree limbs come in contact
> with it. I had used a number of pieces which originally were in the clear
> when the towers were installed 20 years ago, but as trees grew limbs came
> into contact and chafed through the outer sheathing. Once the inner Kevlar
> is exposed to UV rays, it may break down. In addition to a major tree
> trimming and removal this year to avoid such contact, I've also replaced
> most of the Phillystran on my seven towers with EHS steel with insulators
> at
> non-resonant lengths.
>
> 73/Jon
>
> Jon P. Zaimes, AA1K
> Tower climber for hire
> http://www.aa1k.us/
> Cell: 302-632-2353
>
> Reviews of AA1K tower work on eham website:
> http://www.eham.net/reviews/detail/12922
>
> Hug your favorite tower every day, and always stay connected to it.
>
> -----Original Message-----
> From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of Tim Duffy
> Sent: Thursday, September 5, 2019 8:03 PM
> To: 'Ron WV4P' <wv4ptn@gmail.com>; 'towertalk' <TowerTalk@contesting.com>
> Subject: Re: [TowerTalk] Polygon Guy Rods
>
> I participated in a group buy of Polygon Rod in the late 1980s. Quite a
> learning curve.
>
> Even UV stabilized is only good for about 10 years - then needs replaced.
> Difficult to work with.
>
> I had one Polygon rod guy break mid span on my 40 meter tower (it was 5
> years old). That was the end.
>
> Just finished this summer getting all of the Polygon rod replaced with
> Phillystran on the tall towers at K3LR. Properly maintained and inspected
> Phillystran with the appropriate preformed line grip terminations should
> last 30 plus years - no breaks or surprises so far with Phillystran.
>
> 73
> Tim K3LR
>
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces@contesting.com
> <towertalk-bounces@contesting.com>] On Behalf Of Ron
> WV4P
> Sent: Thursday, September 5, 2019 7:32 PM
> To: towertalk
> Subject: [TowerTalk] Polygon Guy Rods
>
> Is it still possible to do the group buys on the Polygon pultrusion
> fiberglass rods ? Any Interest ? I have several towers going up soon and
> could use some. Ron WV4P _______________________________________________
>
>
>
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