Hello, new member here. I have found that there is often a bit of ambiguity regarding the 10:1 safety factors often referenced on these forums. What I mean by this is, that I have been wondering what the point of reference should be for establishing this ratio--should we start with the breaking strength of the cordage (or clip/carabiner), or the published safe work load?
It seems that the Figure 9 referenced herein has an SWL of 150 lbs. This might indicate a breaking strength as much as 10 times greater than this. But without consulting the manufacturer, it would be nearly impossible to tell. Assuming that the breaking strength indeed is 1500 lbs., and the user just over 200 lbs in his hammock, he might be in the 8:1 safety factor zone. This assumes the 30-degree hang angle as mentioned above, which results in the vertical load being transferred to both cords. Of course, one should never apply a load to anything that is greater than the published SWL!
Regarding the paracord, again, is 500 lbs. the SWL? And what safety factor does the manufacturer base that on? 5:1? 10:1? Further, what assumptions must be made for wear and tear, loss of strength when looped through the Figure 9, and the hanging angle being imperfect?
I am trying to determine what I should purchase for my own setup, but I don't want to go overboard with amsteel or any other premium material unless I can justify it. A few extra bucks would not mean much if I was a serious backpacker/hammocker, but I am just looking for something "safe" for occasional recreational use at the park. Thanks for any input!