What kind of knot is this?
Circus knot/
circus hitch/(one of the big three's name) knot
How does it compare to other forms of cable termination in terms of loading/termination efficiency?
As you can see from the picture it is a, relatively, fast method of using
wire rope, as there is no additional tools/parts needed to terminate it. However, it will not have the same strength of a more "normal" method of termination.
Should it ever be used? Why or why not?
This depends on who you ask.
Yes, in temporary situations only. But also only by those that have been trained how to tie it properly, and know exactly what it's limitations are. Even then, as sparingly as possible.
No, unless you are a proffesional rigger or are under the supervision/teaching of one (or have been taught by one and know it's limitations).
I say: this is a dangerous knot, especially when people forget how to tie it correctly (I've seen people forget to tie the
clove hitch first). People see that picture and the others associated with it, or have learned it from another source and try learning to tie it. Then they try it for real and can't remember how to do it. That said, I have never chosen to use it.
A few other concerns I'm not going into:
How long should the tail be?
Which direction should you go, and does it matter?
Can you use the rope afterwards (clip end or trash completely)?
How much should you clip?
Where can you I find someone to teach me this knot (good luck)?
How much weight can it hold?
Sent from my iPhone using Tapatalk