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Re: [TowerTalk] Tram rope

Subject: Re: [TowerTalk] Tram rope
Date: Mon, 18 Dec 2006 16:11:46 EST
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In a message dated 12/18/2006 9:02:08 P.M. Greenwich Standard Time, writes:

For  example, the breaking strength of 7/16" nylon rope is about
4,500 lbs, with  a safe working load between 450 lbs and 900 lbs (some
references say no  more that 1/5 breaking strength, others say no more than
1/10 breaking  strength.)

I would prefer to use nylon rope for a tram line since it's lighter and  
easier to handle than EHS.  The problem is however, with heavier beams the  
tends to stretch.  In the process of dismantling my antenna farm in  FL last 
spring I tried using it to slide tram down the longer boomed stuff (15  meter 6 
el KLM).  The rope stretched and the antenna I was I taking down  from midway 
up the tower sunk back closer to the tower and got pretty well  ensnared in 
the guy wires below it.  It was a real PITA getting it  out.  
I have no doubt the stuff you are using will hold the antenna, but be aware  
nylon does stretch.  The ultimate solution would be some nice 3/16 aircraft  
cable (like the stuff I stufff before I left for KH6)...sigh!
Bill K4XS/KH6

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