It's half of the grapevine knot, with one extra turn.
You could call it a triple overhand knot.
For various reasons, I'd call the
noose
structure a
"double strangle noose" --as
a
strangle knot (a binder) has the form of
the
grapevine's halves, and adding a turn
follows then one nomenclature for "double"
--and the implied number (2) can be seen
in the overwraps (turns over the crossing
of the ends). Ashley calls this the
scaffold
know (#1121). (There is the
poacher's nooseto refer to, too --Asley's #407.)
The walking-stick text asserts:
Shown below are some variations: grip above knot and grip below knot. The prusik knot winding on the shaft and the loop adjustment noose will not slip during any stresses encountered during hiking action.
I'd be chary of putting force by hand directly
on the
Prusik hitch, which would need to be
set quite tight to resist movement by hand
in such loading. (YMMV w/particular materials.)
--dl*
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