Packable Tensahedron Stand

Discussion in 'Hammock Kit' started by Gadget, Apr 15, 2018.

  1. Gadget

    Gadget Thru Hiker

    Made me a packable Tensahedron stand out of steel conduit, not light, but small enough to throw in a car.
    Here are some videos,

    ASSEMBLY


    HANGING A HAMMOCK


    PITCHING A TARP


    (apologies, this ain't ultralight by any means, but you can fit it in a car, so that's pretty small for a hammock stand)
    Dave Vaughan, JimH, gixer and 2 others like this.
  2. Gadget

    Gadget Thru Hiker

    Pretty happy with it as a prototype, but not wild about the weight (8.78kg).
    Tempted to used CF tubes in the next iteration, but stumped on what diameter/wall thickness to go for.
    The steel for this one is DETA 20mm (1.6mm wall) Class 4 Conduit, made from grade Q194 rolled steel (BS 31:1940), any folk out there, who knows what the comparable would be in CF?
  3. SafetyThird

    SafetyThird Trail Blazer

    That looks very neat indeed. Would aluminium poles be strong enough while being lighter?
  4. Rog Tallbloke

    Rog Tallbloke Thru Hiker

    Isn't there quite a lot of force pulling upwards on the ground anchor as you swing in? Think I might be looking for a root or fence post to tie that ground cord to. Good design only needing one point to fix to though.
  5. Rog Tallbloke

    Rog Tallbloke Thru Hiker

    Looking at the way CF fails, I'd stick with steel or aluminium. The most stress on the pole is near the middle, when it deforms elastically. So your best bet for a lighter solution on a steel pole is thinner at the ends, thicker in the middle. Reynolds make it in various ratios and lengths. It ain't cheap though. For a collapsible pole, go for thinner end sections and fattest in the middle.

    Not the section you need, but aluminium scaffold pole is ~2.5 times lighter than steel scaffold pole.
    Steel tubes usually weigh 4.37kg/m (2.9lb/ft), whereas aluminium tubes usually weigh 1.67 kg/m (1.12lb/ft).
    Taken from HSE website

    The mobile radio hams use some nice sturdy sectional aluminium aerial masts that don't cost the earth.

    https://www.ebay.co.uk/itm/Maxview-...332521410980?_trksid=p2349526.m4383.l4275.c10
    Last edited: Apr 16, 2018
  6. Gadget

    Gadget Thru Hiker

    The force on the ground anchor is dependant on your position in the hammock. If you put the head end a lot lower than the foot end, that will put your body closer to the head end, and the leverage on the ground anchor will be greater. With the head and foot ends more level, your body will be closer to the middle of the hammock and there will be very little force going to the anchor. But you can go too far, if your CoG is close (or on) the centreline of the stand, the ridgeline will go slack and the head end poles will start to close up (like a beartrap).
    Todd Farner is the inventor, he has a commercial version for $300,
    http://www.tensaoutdoor.com/

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