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thebuffalo
Mar 23, 2007, 7:28 PM
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When I was a kid, my grandfather passed down a bunch of (probably unsafe) equipment including a goldline, really old carabiners, and some old BD hexes that were super thick and made out of soft aluminum. They were roped with 7-8mm cord and tied with a double fisherman's knot. They were also backed up by tying another fisherman's knot with the tail ends (to the cord, not each other). I haven't seen it done like this since. Any opinions on whether this is better, unnecessary, or whether my grandfather just had OCD?
V
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bobruef
Mar 23, 2007, 8:10 PM
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I think if one were ocd, a tripple fisherman's would be the way to go.
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ja1484
Mar 23, 2007, 8:24 PM
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I know a guy who slings his hexes/bigbros with quad fishermans knots. Whatever works for him. I usually just do a triple fish (I sling with Sterling Powercord - not nylon) and check the knots before each climb.
Seems to work fine.
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lostparrot
Mar 23, 2007, 8:55 PM
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what about double fish for hexes? doubles back to back lock tight, why bother with trip?
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dan2see
Mar 23, 2007, 11:00 PM
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lostparrot wrote: what about double fish for hexes? doubles back to back lock tight, why bother with trip?
It doesn't matter what type of pro you use: big hex, big nut, or cam -- the knot has to hold.
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ja1484
Mar 24, 2007, 1:25 AM
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dan2see wrote: lostparrot wrote: what about double fish for hexes? doubles back to back lock tight, why bother with trip? The high-tech cords are more slippery than nylon. When your pro catches your fall, it could slide off. That's a reason to tie a triple fisherman's. It doesn't matter what type of pro you use: big hex, big nut, or cam -- the knot has to hold.
Bingo, Sterling says the triple fishermans knot is the appropriate knot to use when securing Powercord, so that's what I use.
Most nylon cords are fine with a double fishermans, but they tend to be bulkier and less abrasion resistant. They have their advantages, and I still use nylon for equalletes and prusik cord, and I use nylon sewn slings, (for obvious reasons), but rarely for slinging pro any more.
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COsnowman
Sep 13, 2008, 7:51 AM
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Just interested in knowing if the double fish knot is the strongest/safest knot for joining two ropes for rappel. I would also like some input into the debunking of micro fractures if metal gear. Any help out there thanks.
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binrat
Sep 13, 2008, 6:06 PM
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CO;
The DF knot is strong, but may get caught when you pull it. There are other knots that are equally as strong but don't catch that easy.
binrat
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milesenoell
Sep 13, 2008, 7:50 PM
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COsnowman wrote: Just interested in knowing if the double fish knot is the strongest/safest knot for joining two ropes for rappel. I would also like some input into the debunking of micro fractures if metal gear. Any help out there thanks.
As far as I know, micro-fractures from drops are a real concern in metal gear, but that they tend to come from drops not smacks so you tend to know if you are in jeopardy.
As for 2 rope raps, the Euro Death Knot (aka: double overhand knot) well dressed with big tails is an old standard
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acorneau
Sep 15, 2008, 12:31 PM
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Registered: Feb 6, 2008
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COsnowman wrote: I would also like some input into the debunking of micro fractures if metal gear. Any help out there thanks.
Read here: http://onrope1.com/Myth1.htm
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