Toast Posted November 30, 2005 Share Posted November 30, 2005 (edited) It's common practice to use the double/triple Fisherman's Knot to join rope ends, and it's specifically used for tied Perlon slings and cordalettes. Unfortunately, it's one of the worst knots to have to untie after the knot's been weighted several times. A friend of mine suggested the Sheet Bend (i.e. a sideways tied Bowline.) After a little thought, I couldn't think of why not, especially with a double wrap and a Yosemite finish (sort of like how gym climbers tie in.) Doing so reduces the arc angle of bends, thus mitigating loss of strength, and it makes this knot easy to untie. The only trade off I can think of is I don't know of anybody who uses this knot, and most won't be familiar with it. Does anybody have any test data on the strength of this knot or the degradation of rope strength vs. the Double Fisherman's Knot? Edited December 2, 2005 by Toast Quote Link to comment Share on other sites More sharing options...
catbirdseat Posted November 30, 2005 Share Posted November 30, 2005 A Carrick Bend is as strong as a Double Fisherman, stronger than a Sheet Bend, yet is easier to untie after it has been loaded. If you use it, it is recommended to back it up with either siezings or half-fisherman knots. Here's some strength figures. Lord knows where they came from. Quote Link to comment Share on other sites More sharing options...
Toast Posted December 1, 2005 Author Share Posted December 1, 2005 Thanks CBS. The problem (and the virtue) of the Carrick Bend is it's slippery and unties, probably, too easily. It's also super bukly. I'm trying to get a handle on whether the knot I described would be suitable for a cordalette or tied perlon slings, things I'll occasionally want to untie (think V-thread or tying around a big ass anchor.) I don't see why not, but that's why I'm asking the question. Quote Link to comment Share on other sites More sharing options...
catbirdseat Posted December 1, 2005 Share Posted December 1, 2005 Thanks CBS. The problem (and the virtue) of the Carrick Bend is it's slippery and unties, probably, too easily. It's also super bukly. I'm trying to get a handle on whether the knot I described would be suitable for a cordalette or tied perlon slings, things I'll occasionally want to untie (think V-thread or tying around a big ass anchor.) I don't see why not, but that's why I'm asking the question. Carrick bend is out then. Your rewoven sheet bend should work, or else a double sheet bend, for cordage with a slippery core, such as Spectra. In the double sheet bend you make two loops instead of one. Quote Link to comment Share on other sites More sharing options...
Toast Posted December 1, 2005 Author Share Posted December 1, 2005 Yeah, like the second pic Quote Link to comment Share on other sites More sharing options...
Macson Posted December 1, 2005 Share Posted December 1, 2005 I'm pretty sure a sheet bend is the standard knot for joining ropes of different diameter (in sailing). In your top picture the skinnier rope would be the one coming from the right. Quote Link to comment Share on other sites More sharing options...
Toast Posted December 1, 2005 Author Share Posted December 1, 2005 Yeah, the question is, is there any reason you wouldn't use it for climbing? Quote Link to comment Share on other sites More sharing options...
Dru Posted December 2, 2005 Share Posted December 2, 2005 why not just use the edk? Quote Link to comment Share on other sites More sharing options...
catbirdseat Posted December 2, 2005 Share Posted December 2, 2005 Because it can come untied too easily. Quote Link to comment Share on other sites More sharing options...
Dru Posted December 2, 2005 Share Posted December 2, 2005 pfffff Quote Link to comment Share on other sites More sharing options...
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