The hitch looks to be an SRT hitch, being able to descend on it’s own, like some others, most notably, the Synergy X, which uses the typical wraps, and keeps the over hands in front of the rope, the orange hitch. The drawing is the WLR hitch I got from their YouTube, and is unique in loading from the bottom and the middle.
I looked at their spliced products and noticed the Beal Pull Line has a break strength of 12 kN, and is rated at 10 kN when spliced. The Canyon Lux goes from 24 kN to 18 kN for the spliced eye. The buried cover might be put in with less core than normal for both to fit causing the lower numbers.
The diagram to show how the load is shared was surprising to me, guess I never did the math, the hitch cord only needs to be 5.3 kN if a 5000 lb safety is desired. My goal for hitch cords was 12-13 kN at the low end, might have to rethink that.
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