Infinity loop on anchor
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My friend sent this photo from a route in Korea. Does anyone know how this infinity loop with the cable is created? |
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There has to be a splice somewhere? How else would you get the hangers and hook on? Cool. |
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Excuse me WHAT?!? Sorcery. |
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It's called a "cable laid grommet" and is spliced (woven) like that. Similar to splices made in hawser laid rope. The ends are hidden inside. As the loop is stressed, it tightens like a Chinese finger puzzle. |
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“Sorcery” is the right word! @wivanoff, would the developer have done this weaving/splicing on the wall or does it involve a specific tool? |
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Using "cable laid grommet" as my keywords, I found this video showing the process of creating the infinity loop: |
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Anna Brown wrote: Well that’s a painful 30 minutes! (Gave up after 5 min) |
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New take on the "American Triangle ". |
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Aren't these essentially American death triangles (apart from the cable material forcing them into a more circular shape)? The angle doesn't look too bad on the first pic, but second pic might be a little concerning. Also, how would one assess when it's time to replace? Would it be apparent from looking at the outside of the cable, or might there something going on inside to be worried about? Edit: nbrown beat me to it. |
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10/10 would whip. Every triangle is a love triangle if you love triangles. |
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Anna Brown wrote: Probably did the weaving/splicing with two hangers and a mussy hook from the comfort of home |
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Taylor McKenzie wrote: "Conveniently" the single lower off mussy hook is likely to wear out first, and with the way that thing is constructed, the whole ring would need to be replaced. |
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Alex R wrote: Or you put a quick link on the cable and attach a new mussy to that. |
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I’ve been dumbfounded trying to figure out the point of this but I think I’ve got it. What a perfect loop to hold onto while clipping the mussy! I’m thinking comp rules should apply, both hands on the finish for a controlled 2s hold and then grab the clipping loop, does that sound fair to everybody? Extra style points for clipping the lower-offs “free”. |
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Anna Brown wrote: I've only done this with nylon rope. I imagine there's a tool for wire rope - else you'd get your fingers chewed up. I would have done it on the comfort of my home. |
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Marc801 C wrote: I suppose... Could even put one on each bolt. Goofy anchor setup from someone doing a poor job reinventing the wheel. |
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Taylor McKenzie wrote: "American Death" triangles aren't actually a thing when it comes to bolts. You'll still get 20+kN per bolt depending on the linking material you use as a single loop. Plus you are 99% of the time just top roping or rappelling off of it at < 1.5kN. |