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  1. #1
    Member zyhano's Avatar
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    Lightbulb soft shackles with diamond knot, locked brummel splice and testing data

    Hey folks,

    since my discovery of amsteel right here on hammockforums I've found some good tutorials here, but also elsewhere.

    After doing a quick search on hammockforums I found that this site has never been referenced: http://l-36.com/

    It has a great tutorial on making a soft shackle (carabiner replacement) of amsteel with a diamond stopper knot and a locked brummel splice after the 'chinese finger trap', which seems like a way stronger and reliable method than the one described in a great tutorial posted here on HF which uses a double overhand knot as the stopper knot and the 'chinese finger trap' only.

    Since his tests show that the soft shackle is stronger than the cord from which it is made, it might not matter much which soft shackle method of construction is better, since they will not be the weakest link of your system anyway.

    So, check it out, it also has a nifty calculator so you can change the marker positions: http://l-36.com/soft_shackle_howto.php

  2. #2
    opie's Avatar
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    Just a couple weeks ago I posted a link to that site while looking into getting some hard numbers for a larger shackle. Good stuff to say the least.

    I had a 7/16 shackle load tested and pulled to failure. Test showed that the diamond knot derates the single line average strength by 30%. This is moot since the shackle will surpass the single line average strength anyway... But it was nice to know.
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  3. #3
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    Good link guys. Thanks for sharing.
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  4. #4
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    OK, this is a very good tutorial, but....how do I finish the two ends of the Amsteel? A light coating of super glue? Heat-shrink tubing? Whipping with thread? Or do I just let them ravel back to the knot?

    - Will

  5. #5
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    Bury it, then backsplice it.

  6. #6
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    im still learning a lot on this website
    no superglue. creates weak point
    cut 1/4 inch after knot has been stressed/used.
    good 2 go.
    have safe.
    be fun.

  7. #7
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    Thanks! I made a couple of these today. On one I spliced the two loose ends back onto each other, leaving a nice loop just past the knot, and I think I will do this going forward. It's tidy, and it gives a place to hook my finger into.

    I appreciate the advice!

  8. #8

    soft shackles with diamond knot, locked brummel splice and testing data

    Quote Originally Posted by wenestvedt View Post
    Thanks! I made a couple of these today. On one I spliced the two loose ends back onto each other, leaving a nice loop just past the knot, and I think I will do this going forward. It's tidy, and it gives a place to hook my finger into.

    I appreciate the advice!
    Can you post a picture if this?

  9. #9
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    Smoothisfast, I can try, but instead of two stubby ends past the knot, there is instead a closed loop of rope. If you really want it I can do it. :7)

  10. #10
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    Quote Originally Posted by wenestvedt View Post
    OK, this is a very good tutorial, but....how do I finish the two ends of the Amsteel? A light coating of super glue? Heat-shrink tubing? Whipping with thread? Or do I just let them ravel back to the knot?

    - Will
    After you have hung on the soft shackles a couple of times to fully set the knot, one can simply trim the ends close to the diamond knot to further reduce weight.

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