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  1. #201
    New Member fortbuilder's Avatar
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    It should have been drawn like this.

  2. #202
    Hey guys! This look incredible! I want to build one!

    I have a few questions from experienced builders for this project.

    First, the light poles are elegant, but I am not as concerned about the carry weight for my purposes, and want a build list that I can fill out at any hardware store. How about 10' galvanized steel pipe for the poles? Very strong I imagine, but heavier. Would that impact the effectiveness of the structure?

    Also at least for the first build I was considering using 1" ratchet straps for the tendons. At least while trying it out. I want to make sure I understand the type of forces at play here though, The 1" ratchet straps I have are rated at 900 pounds, which I think would be sufficient, as dejoha was talking about using 550 cord. Although with the levering and tension of a tensegrity structure I don't know what kind of strength I need for the tendons. I like the idea of ratchet straps because I can set them to the right length to start.. then tinker a bit if I have to without re-knotting.

    I think once I get the dimensions right something pre-measured might do for the upper and lower triangles, then maybe only straps for the side tendons.

    I notice they sell 1" steel pipe in 6' threaded lengths, with 2 inch threaded couplers, so having a segmented heavy pole would probably work out as well.

  3. #203
    MacEntyre's Avatar
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    One key consideration in choosing the material for the tendons... stretch, which should be minimized. That's why we used Amsteel, which also eliminated worries about the load.

    - MacEntyre
    "We must, indeed, all hang together or, most assuredly, we shall all hang separately." - Ben Franklin
    www.MollyMacGear.com

  4. #204
    Alamosa's Avatar
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    Quote Originally Posted by pavoroyale View Post
    Also at least for the first build I was considering using 1" ratchet straps for the tendons. At least while trying it out. I want to make sure I understand the type of forces at play here though, The 1" ratchet straps I have are rated at 900 pounds, which I think would be sufficient, as dejoha was talking about using 550 cord. Although with the levering and tension of a tensegrity structure I don't know what kind of strength I need for the tendons. I like the idea of ratchet straps because I can set them to the right length to start.. then tinker a bit if I have to without re-knotting.

    I think once I get the dimensions right something pre-measured might do for the upper and lower triangles, then maybe only straps for the side tendons.
    That is exactly how I set mine up and got it adjusted. After I had all the lengths correct, I still used a single rachet strap to apply the initial tension to the stand before hanging my hammock.

    I used the 1.25 EMT conduit and never had any issue with bending of the poles, so I am sure the heavier conduit would have no problem.
    We must, indeed, all hang together, or assuredly we shall all hang separately. - Ben Franklin
    (known as a win-win on this forum)

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  5. #205
    Ok guys, I'm intrigued by this... We are going to be setting up a camp for 24hr+ for a ragnar trail event in November. I'd love to have a way to hang at least 3 hammocks, if not more for lounging.

    How have they been holding up? Whats been the best pole so far? I saw the video of Mac's collapsing.

  6. #206
    MacEntyre's Avatar
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    Quote Originally Posted by porsche4life View Post
    I saw the video of Mac's collapsing.
    The solution to that was found in the X-Tensegrity Stand.

    Just make the tensegrity stand such that the struts all intersect touching one another, and bind them together.

    - MacEntyre
    "We must, indeed, all hang together or, most assuredly, we shall all hang separately." - Ben Franklin
    www.MollyMacGear.com

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