I'd have to buy some fence rail to test it, but my guess is that those connections (several inches of swaged "doubled" wall) could possibly be the STRONG point of the 8' length. Other materials/connections, maybe not.Originally Posted by Latherdome
I'd have to buy some fence rail to test it, but my guess is that those connections (several inches of swaged "doubled" wall) could possibly be the STRONG point of the 8' length. Other materials/connections, maybe not.
Stress risers is my vote.
Dave
"Loneliness is the poverty of self; solitude is the richness of self."~~~May Sarton
As long as only the ends of the poles are loaded, there's no bending moment until the compressive load limit is approached, regardless of the suspension angle. But to keep the poles from swinging inward with suspension angles shallower than that of the poles, both ends would need to be guyed strongly to ground, as with stands like YOBO or DD/HandyHammock. This requirement somewhat dilutes the appeal of the present design, which is inherently complementary to more deeply hung gathered-end hammocks.
Last edited by Latherdome; 10-31-2017 at 14:58.
Don't know what I'm talking about but just thought I'd throw it out there to see if it sticks. I know it takes away from the simple design but what about a crossmember? Not sure of the math but maybe it could be really close to the bottom.
artflow_201710302107.jpg
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Considering a turtledog stand uses a fence rail for a cross member that supports 2x? the weight this *should* work.
Here is an interesting read on EMT conduit
http://www.tryop.com/Structure/EMT_0.75_Mechanical.htm
The poles need to move, to stay in line with the hammock suspension.
If you prevent them from moving, then you will putting extra load on them.
--
Gadget
I finally made some time to build a Tensahedron Stand out of my miliatry masts.
Full stand:
Tensahedron.jpg
I did take a video of me getting in, but haven't sorted how/where to upload it.
I didn't have another person with me to take photos of it loaded.
No issues holding my weight at ~175 lbs
Parts:
StandParts.jpg
Bottom Junction:
BottomJoint.jpg
Bottom Endcap:
Bottom.jpg
Top Endcap:
top.jpg
Nice work Knightshade! That looks solid and simple. Pretty sure you could invite friends in to join you given what you told me about the 2.25-lb (x8) aluminum masts. 8’ poles, 11’ hammock?
Last edited by Latherdome; 11-01-2017 at 09:41.
Parts List for what I used:
Military Masts:
8 poles (2 of these kits
https://go-vertical-usa.myshopify.co...ns-female-used
Carry Bag:
https://go-vertical-usa.myshopify.co...arry-bag-white
I've also seen them on: http://militaryfieldgear.com/
Bottom Cap (x4):
https://www.lowes.com/pd/Blue-Hawk-A...1-5-in/3160769
https://www.lowes.com/pd/LASCO-1-1-4...40-Cap/3371574
(The cap is a bit oversized, so I used about 10 wraps of Duct Tape so that it had a tight fit before drilling the bolt hole.)
https://www.lowes.com/pd/Stanley-Nat...x-Nut/50237225
Top Cap (x4):
https://www.lowes.com/pd/Charlotte-P...C-Pipe/3133039
(Cut 4x 4.25" sections)
https://www.lowes.com/pd/Charlotte-P...upling/3514888
Optional, but I used so that I had a "lip" at the top for attaching cords
(I'm sure that they are available as singles - but I was building 2 stands)
https://www.lowes.com/pd/Charlotte-P...ex-Nut/3443480
I used some washers as well, but didn't think to note a specific part number....
In each of the caps, I drilled a 3/8" hole through for the eye bolt.
I joined each pair of caps using:
https://www.lowes.com/pd/Covert-1-4-...lated/50426984
For my test, I clipped my carabiner onto this as well.
I toyed with using washers and short bolts instead - that may make for a better "hinge" effect, but untested as of yet.
Spec wise the Military Masts:
Length end to end: 48 inches
Usable length: roughly 44 1/2 inches
Male end length: roughly 3 1/4 inches
Wall thickness: 0.09 inch (I've also read 0.11 inch - not sure which is correct)
Outside diameter: 1.755 inches
Male end outside diameter: 1.56
Female inside diameter: 1.565
Weight of 8 poles is ~18 lbs (roughly 2.25 lbs per pole)
My hammock is an 11' Hexon 2.4 gathered end with a 110" ridgeline (zing-it)
I have 8" continuous loops on both ends, and used a carabiner to attach it to the "chain".
The splay at the bottom was ~6' wide. (I started with a shorter splay, but found that my shoulder nearly touched the pole)
The one "mishap" that I had was my balance line.
The ground was *very* soft here (nearly constant rain past few days).
My 7" triangular/Y tent stake pulled out when I went to add weight to my hammock.
While caution was being used for the first test, this did cause the rig to collapse in on me.
I ran my other tests with a length of Zing-It run to a small tree, all with success.
So - it would seem that I have some playing to do with an ideal anchor if in the middle of a field.
Last edited by knightshade; 11-01-2017 at 10:21.
Are you anxious about PVC in a load-bearing application like that? Looks stout, but I’m suspicious of that stuff (says the guy who broke his featherweight carbon fiber flavor when a shock cord untied or wore through, causing the bundle to eject itself along the highway ill-secured to motorbike. It held up in use at least.)
Re tether hold in soft ground, with a small short stake chances improve with a long line so the tension is perpendicular to a near-vertical stake. A ground screw works better when the pull is going to be nearer vertical (smaller footprint).
Last edited by Latherdome; 11-01-2017 at 11:35.
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