Your attachment refers to 566:2006. Not sure that is the same thing that is referenced in the Tybelt literature. I agree, whatever the rating is, my tender body would fail before any of the referenced standards are exceeded.

BTW, I have used a belt in technical rigging. This was a long time ago, and I had a strong steel buckle stitched to a sturdy length of webbing. Short of gear on a technical rescue, I employed it as one leg of my multiple-point belay. It worked, although it was never significantly stressed..I wore that belt for several years and I was always glad it was handy, though I often wondered just how strong it was...