If you make a multipart lashing (low friction rings or similar for eyes), how do you calculate the appropriate
safety factor? We know that the lashing is somewhat lower than the sum of the legs, due to friction and un-equal loading. If you started it with a
knot that also weakens the lashing (weakest link!).
Is there a published
rule of thumb? For some things you can just add a lot, but for standing
rigging, for example, you really should have a number. I've been doing some pull-testing and I've done some calutations based on friction (they are quite close), but I'll be darned if I can find a reference.
I
recall Starzinger did some testing, but I'm only finding the summary, not the detail. Too bad he took his site down. So much good information.