Surely this stuff is well documented by rope manufacturers who make climbing/rappelling ropes?
Sorry if I'm grabbing the wrong end of the stick here, but it reminds me of the time that we were forbidden to conduct rappelling operations from helicopters using the (extremely well-tested by time and experience) rope attachment devices which would obviously hold not only the intended load, but a piano and an elephant as well, because nobody in the engineering world was willing to put their name to a piece of paper certifying that the RAD could do the job safely.