Hi all,
First, you might want to see my related post on the Ring Hitch for HM lines, as it is about a similar structure. Next, one of these days we'll do some tests on the seized Carrick Bend, but for the moment I love it as an easily disassembled structure, particularly for very large lines. A few hundred years of field testing has shown that it can work just fine, given good seizings.
That leaves the question of hitching two eyes together. Because the load is balanced going into the know -- unlike, say, the Square Knot that the structure resembles -- there must be, as pointed out above, less tension load or shear on any one part. No doubt there is some weakening involved, but again field testing seems to show that it isn't critical. I'll see if I can come up with some data on this (it's around here somewhere).
Fair leads,
Brion Toss
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