There are some things you can do to make the 16 strand splice easier, but first...
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by BlinkyNick will kill me for divulging the secret but the best way to splice 16 strand is to...
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On the contraire, good sir. These forums are so that we may all learn. I do have a few secrets that I will never share (mwah hah hah!!!!) But I truly do want to help people become better splicers. And I agree 100%. On short 16 strand slings, get rid of the core and make the cover tail be the core. Then you don't have to mess with the stupid crossover.
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by Jesse:I am not an experienced splicer but I have done some 16 strand splicing. It is my understanding that the crossover is a very important part the splice, it adds a lot of strength to it.
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Brion already clarified this point, but I wanted to reiterate, the crossover doesn't really "add" strength, but rather serves as the transition from the cover tail to the original core strands. We want it to be smooth A) to minimize chafe and B)to provide smooth hitch slidage as the friction hitch slides over that part of the rope. Both hour glasses and divots can cause the hitch to jam for a second.
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by moray: The case is not proved, but my results certainly suggest that overlapping cores or tapered buries don't have a big effect on strength.
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Moray, I don't dispute the findings of your testing. However, I do want to remind that lab testing and actual use are very different. In the field the non-tapered splice would see a lot of abrasion/chafe right at the bump. Put that splice on the testing bed after 6 months and I think you'll see that 90% efficiency drop dramatically.
There is rarely ever a good reason to not do a good taper for tree climbers and arboreal riggers. Can anyone think of one?
Here are a few tips that come to mind when doing the 16 strand splice:
1. Before beginning the crossover, complete the eye and throat of the splice. You'll have enough to worry about soon. You don't want to have to come back to deal with the eye/throat later.
2. Jesse mentioned he the bury in 2 passes. Pass one brings the cover tail to Mark C, (not Mark Chisholm...), then the second pass bring the cover tail from C to D. 1 long pass is easier, but for many people 2 passes is most feasible. If this is you, don't bring the first pass right out at C. Bring it out a couple inches above C (a couple inches closer to the eye). There is a lot of strand distortion already from the core strands coming out at C. You want to work else where.
3. The Toss Wand is my favorite splicing tool, by a long shot. However, when dealing with crossovers, don't use the Toss Wand on 16 strand. The wire fid will be your friend. Coat hanger wire is the thickest you'll really encounter, and that'll do just fine.
4. Before bringing the fid from through from D to C, pull out a lot of core strands. Your goal is to bunch up the cover around the crossover. This gives you a bit more room inside the rope to pass the fid. You are minimizing resistance.
5. Insert the tip of the fid on the side opposite where the core strands are coming out. Think of the core strands coming out as a little face or a head sticking out of the rope. You want the fid running of the spine of that person.
I really need a better way to explain that!
6. When bring the tip of the fid between C and D, keep tension on the core strands with one hand while the other two hands are working the fid through the rope. (You do have 3 hands, don't you?). Keeping gentle tension on the core strands makes it a little harder for the fid to get tangled in the core strands. It also amplifies what you can "feel." You'll have a better chance of "feeling" if the tip of the fid got twisted up in the core strands.
7. Once the fid is all the way through, pull on the core strands to ensure it slides freely. If it doesn't, you've snagged core strands. Pull the fid completely out (or at least back it out to clear the jam) then reinsert it.
8. Now the fid is in place. Attach the tip of the cover tail and begin pulling the tail through. Again, keep tension on the core strands when possible. The core strands provide resistance to the cover strands. You can minimize that resistance by keeping them taut and thin.
9. Regardless of what type of fid you are using, make sure it is anchored to something so that you can use both hands to work the cover, core, and tail of the rope.
10. This part might not make sense until after your first few 16 strand splices: Finesse will get you much further, much faster, and with much less frustration than will strength. This is true in many facets of life.
Please let me know if any of this doesn't makes sense.
love
nick
and yes, there's one secret that I have that really helps, but I save that for the folks that take my splicing class!
