In a message dated 12/18/2006 9:02:08 P.M. Greenwich Standard Time,
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!
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