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  1. #11
    Brute1100's Avatar
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    I could be wrong... But even doubling it over your not going to add it all up like that... The weakest link is still the weak link... Once you get 275 lbs of weight(using your math of 50% in the knots) on that knot It's breaking... When 550 breaks, you get a little warning... You will hear the 7 strands break one by one when you move... Then the last few and the outer jacket will all snap almost simultaneously...

    But the first rule in hanging is never hang higher than your willing to fall... So hang your own hang... Put some padding on the floor and sleep comfortable in your own math...
    Live, Laugh, Love, if that doesn't work. Load, Aim and Fire, repeat as necessary...

    Buy, Try, Learn, Repeat

  2. #12
    New Member
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    Not doubting the first hand experience...

    I'm basing the calculations on Rope Rescue System designs which are all calculated using an allowable 600lb load and a 15:1 safety margin (9000lbs) which means everything in the system must be rated at over 9000lbs. 1" tubular webbing is rated at 4000, so just looping it with a water knot (two legs - 8000lbs) isn't an acceptable anchor strap. But doubling it is. In other words, you can't just loop it, or girth hitch it, but folding a loop around an anchor gives you four legs and a rated 16,000lbs (provided the legs are even, sharing the total load, and the maximum angle between legs isn't exceeded.) Basically, the same concept I was using figuring the strength of the 550 cord. This is an accepted practice for anchor straps according to NFPA 1987, and CMC Rescue text. I teach rope rescue for the fire service and tend to over analyze system strength since the lives of rescuers and victims literally hang in the balance. Which is why, even though I trust the math, and my rigging technics, I did and still do use cushions under my hammock while testing my suspension system, and now I am so paranoid about the cord, I have to find some Amsteel quick!

  3. #13
    firemedic's Avatar
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    Quote Originally Posted by fmlstewart View Post
    have to find some Amsteel quick!

    LOL

    I have been involved in technical rope rescue for a good while now, between that and being in the Navy, I am kind of knot / line / rope nut.

    If you are anything like me when you order your Amsteel, get a lot of extra.

    I found myself making whoopie slings, soft shackles, continuous loops, etc.

    My wife saw that I had knitting needles ( used for splicing fids) in my truck, and swore I was seeing and older woman

  4. #14
    New Member
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    Poncho Liner

    I noticed in your sig line, yiu use a poncho liner for insulation. I've been using one with my camping setup for years. How well does it work with a hammock?

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