I use 12mm diameter pre-stretched polyester rope, intended for marine use. It's
UV proof and rated for just over 4000lbs. That's on a 60 foot crank up.
No knots - they effectively half the strength. The ends are formed around
thimbles and then are spliced. Then I uses a 1200 lb rated rope to go four
times through the thimbles to act as a 'come along', much as was done with the
blocks on ships in the days of sail.
There are quite a few ropes for marine use: some are intended to stretch, but
pre-stretched polyester isn't. Also, not all are UV proof. The down side is
that prestretched polyester isn't cheap - it cost me about $900 - and it isn't
that light, either. But it works for me.
73
Peter G3RZP
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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