Wow! The original post is over 2 years old and still going strong. Twisted Kevlar Thread #800 has a minimum breaking strength of 225lbs. I'm not sayin', I'm just sayin'...
Thats why i didn't take to much time to answer the question.
225lbs is nothing. Thats just for static loads. Repelling is dynamic and create a lot more force than that. It's also not just the strenght of the cord, but also if you can control you rappel. So you need a certain thickness for a belay device.
You're exactly right PC2K, when it comes to suspending yourself from, say a 10th floor landing, 225lbs. breaking strength
is nothing.
That's the problem with written communication, it's very difficult to convey sarcasm. I would
never seriously advise someone to trust their life to 550 cord or Kevlar thread so when I post silly comments like these I'm acting on the assumption that those reading my post clearly understand it's ironic nature.
I'm confident that you, and probably most ETS readers, understand this but it is a good reminder to me that often young or naive readers might visit this page and get the wrong idea. So, for the record, I
do not advise using paracord or Kevlar thread for repelling.