[TowerTalk] pultruded/polygon rod

[Patrick Greenlee]

I have used/repurposed some "sucker rod" intended for use on pump jacks 
(Texas Grasshoppers) to pump oil out of a well.  Fiberglass strands are 
all unidirectional, and parallel.  They come with metal threaded portion 
epoxied on the ends, one end male and the other female.  They are very 
very strong but a tad heavy (and heavy duty.)  They have various 
possibilities for ham use.  I have one (actually about 60% of one as an 
extension to a 20 ft vertical pipe that holds up the feedpoint of a 180 
ft by 90 ft OCF dipole (Carolina windom.)  I'm in Oklahoma where the 
wind comes sweeping down the plain.  Today's gusts top out at 55MPH.  My 
OCF dipole has been up for about 4 years or so with no problems.

If you were to erect one of these rods supporting it only by the 
threaded metal end piece it would survive OK but would not stand very 
straight due to bending under its own weight.

http://www.fiberglasssuckerrods.com/downloads.html

I found these used but in perfect condition for $20 in single lots but 
cheaper in bulk.  At 37 ft for $20 that is just over 50 cents a foot and 
can be screwed together using their threaded metal ends.  They are made 
to be in tension and are super strong. Used unprotected in outdoors 
applications. Impervious to rain and ice.  See the link for specs.

Patrick        NJ5G

On 3/6/2018 12:08 PM, Steve Baughn wrote:
> Wanted to pick some of the experts’ brains on the use of fiberglass rod for guys such as strength and durability/lifespan. I am considering using this for a tower project. Was originally looking at phillystran but for the heavy duty stuff it is price prohibitive here. Any thoughts, suggestions,  etc on what to look for or ask about appreciated.
>
> 73, Steve, WD8NPL
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