This all well and good, though the places I purchase rope or cord don't indicate the specs in SI.
We could provide a conversion chart and then all be on the same page, so to speak.
As long as we know the break strength of the test piece, be it of international units or whatever, we will have a standard at least to go with.
I am not suggesting the use of apparatus that will be devoid of safety and am not recommending jumping/stepping or the like. Perhaps a simple device such as a lever of sufficient length to provide the necessary forces and distance from the subjects. Using a zoom lens, if you want "action" photos, it can be documented as such.
I am interested in getting some basic understanding of the failure(s) and successes of the specimen choices that we all can agree with. A collective test. It will take into consideration the minor possible discrepancies of the various testers, e.g., dressing and how tight, rate of force applied, and a few other influences.
Any ideas on the test machine(s)?
SS