> How does one know the
difference in break strength to order the right stuff? I don't want to
buy the low break stuff and have a hammock disaster.
I did some research a while ago on webbing strength. I have misplaced
it, of course, but I think I remember the main conclusions. Breaking
strengths vary so the weave does matter, but only if the webbing is
less than 1". Webbing is strong, so any webbing that's wide enough to
protect the trees will be strong enough. Nylon is strongest (except
for spectra, dyneema, kevlar and the like) but it stretches,
especially when wet. Polyester is almost as strong as nylon and
doesn't stretch much. Seat belt straps are 2" polyester and have a
breaking strength of something like 10,000 lb or so. I don't know of a
good source for seat belt strap material, though. Polypropylene is the
cheapest and the weakest but even it is strong enough if it's 1" or
more. Some polypro strapping is a bit marginal on strength, though.
It's strong enough but doesn't give as big a safety margin as nylon or
Basically, any 2" strap is overkill on strength and very easy on the
trees. Any 1" strap is strong enough. Narrower strapping should be
nylon or polyester.
> spectra/dyneema webbing for 80 cents/foot...
That's a bit of overkill. Any webbing that's wide enough to work as a
tree-hugger is strong enough. No need to pay extra. Although, it
wouldn't stretch would it? Hmmm...