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Mar 24 '18 at 11:16 history edited Mr.Wizard CC BY-SA 3.0
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Nov 20 '15 at 11:16 comment added Mr.Wizard @Walter I suspect that you will run into other practical problems first, such as having strong enough Prusik cord that grips the slick Amsteel rope. Fall-arrest devices are usually made for thick industrial rope but there may be specialized equipment available that suits your needs. Consider posting a Question on this subject so that the wider experience of the community may help you find a solution for your specific situation.
Nov 20 '15 at 11:12 comment added Mr.Wizard @Walter Your comment appears to have been truncated. The main rope over which the friction hitch is sliding is usually not at risk of failure -- I have never read about a case where it was the element that failed at least. However I suppose it may be possible to produce a failure: suppose the Prusik cord is an aramid with a high decomposition temperature and the main line is Dyneema with a low melting temperature; hypothetically if the hitch slides a long way and then catches maybe it could accumulate enough heat to melt the Dyneema. (continued)
Nov 19 '15 at 19:04 comment added user8168 Mr. Wizard, does your concern about the melting point of Dyneema extend to the rope as well as the cord? In my mind, there's more of a problem with accumulating heat on the cord, as it moves with the climber, picking up heat from each slide and carrying it along. On the rope, however, any one surface only contacts the prusik briefly, so it shouldn't accumulate heat in the same way. My interest is in a safety rope for my deer-hunting stand, rather than in traditional rock climbing. A smaller diameter (within the 70% parameters of prusik knots discussed above) Amsteel rope (made from Dyneema) is
Jan 13 '14 at 10:52 history edited Mr.Wizard CC BY-SA 3.0
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Jan 13 '14 at 10:39 history answered Mr.Wizard CC BY-SA 3.0