Originally Posted by bigevilgrape
This is why i'm confused and asked. I know that they make a bunch of different stuff from reading the forums, but I can't find a strength rating on any of it. The math does make me feel better since i'm a math geek
Good, feel better.
You can find thread strength with your favorite search engine. Conservatively, I used a lower bound strength and thread from among those DIYGEAR.com offers. Usefully, Scott provides the spool sizes / lengths and thread weights. Your favorite search engine will turn up estimated strengths, also called "tenacity." (Oh, not so easily, I see Chinese mfgs and suppliers are using search optimizers to put themselves at the top of the listings.)
eg. http://www.thethreadexchange.com/miva/merchant.mvc?Screen=CTGY&Store_Code=TTE&Category_C ode=polyester-thread-information
Of course, strengths vary with thread design, so just choose a lower bound for polyester or nylon, ignoring thread-maker. Joann's reports Gutermann "Sew All" is Tex 30 weight.
There are many who don't believe hammock channels are strong enough and who use other methods of grabbing the end. So, it is worthwhile seeing the strength in numbers.....of stitches.