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## 6451Re: 3/32" Hammock Hanging Rope?

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• Aug 4, 2004
To engineer the straps/ropes how big of a safety factor do you plan
on?
If I weigh 200 lbs. and hang at 40°. then my static load on each
rope is 155 lbs. is a rope with 5oo lbs. breaking strength enough?
1000 lbs? 1500 lbs?

--- In hammockcamping@yahoogroups.com, "Ray Garlington"
<rgarling@y...> wrote:
> --- In hammockcamping@yahoogroups.com, "Mirage" <mirage@p...>
wrote:
> This is what I have evolved to. I found the bulk and weight of the
> 30 ft of webbing rather too much for my tastes. I used what I had
> to make two 10' "tree huggers" (rather long, but some trees here in
> the PNW really require it).
>
> One thing about ropes & trees. I've noticed that most of the
> rubbing/friction is in the first 1/4 turn of the rope around the
> tree. By the time you get to ropes about 5/16" diameter there is
no
> significant damage (but some slight cosmetic scraping). I made
some
> pads to protect this 1/4 turn, and a similar idea might work on
the
> thinner cords. You might try some thick wall tubing for that
area
> to act as a pad.
>
> Concerning breaking strength: I found the following rule of thumb
> for nylon rope on the Internet. (I have observed that woven
> polyester rope seems to have slightly higher breaking strength
than
> predicted by this formula.)
>
> breaking strength = <circumference of line in inches> x 2,400
>
> so
> 1/8" cord - .3927" in circumference = 942 pounds breaking strength
> 3/16" cord - .589" C = 1413
> 1/4" rope - .75" C = 1809 pounds breaking strength
> 5/16" rope - .98" C = 2356
> 3/8" rope - 1.18" C = 2827 pounds breaking strength
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