Turtledog Hammock Stand Troubles

[Us5Camp]

This is a fun little design problem. I think you can salvage your work for the most part. I would recommend a couple of changes.
1) Reverse the Eye-bolt positions. (i.e. flip the end poles over.) Hammock on the inside and stand to the outside. This will make the moments counter-act and cancel each other rather than adding.
2) Bring the eye of the eye bolt as close to the pole as possible to shorten the lever affect as much as possible.
3) Shorten your pole length as much as possible.

This should reduce the moment load significantly. At 16 feet the critical bending load is only 300lbs. Thus assuming everything is perfect you would still only have a margin of safety of 0.37. That is pretty low for something to hang from.
Going to a 14 Foot span increased the MS to .8 and 12' it is nearly 1.5.

Anyway good luck with your project. I am confident you'll get it to work.
Here are my calculation: Assumed a 250lb load, top rail of Dia: 1.315" Thickness: .072". Hang angle 30*. Dimensions as depicted.
Attachment 177903

Statics... Love it !!! Good thoughts on countering the two moments! One of my favorite engrg classes 30yrs ago!!

As I posted above, just following your post... I hang my whoopies right from the rod hanging bolt, which also minimizes the moment carried by the top-rail.

Temp.JPG

[cougarmeat]

Us5Camp, in photo 5, what is attached to the red carabiner? I see your hammock's whoopie sling on the rail with the inner tube, but something is pulling on the red biner. Is it a tarp line?

[Us5Camp]

Us5Camp, in photo 5, what is attached to the red carabiner? I see your hammock's whoopie sling on the rail with the inner tube, but something is pulling on the red biner. Is it a tarp line?

Yes, tarp line.... I use Dutch Stingerz attached to each end of the tarp.... do not use a continuous ridgeline for the tarp. The line shown goes through a tarp sleeve from SLD to a WD 12 tarp.

Capture.JPG

[alphaniner]

I've reduced the bending moment by hanging my whoopies for the hammock from the same eye bolt that suspends the rail

I've been going through the entire TD thread, and AFAICT this is the most advocated method.