Clove Hitch roll out

[Jako]

I've seen a clove hitch cinch up on a crane job. Had to cut the wood really close to the rope to get the thing off. Not sure what went wrong exactly. I don't really only use the clove hitch that often, only when I have to tie off multiple limbs at the same time or if I'm doing an A frame when I don't have my spider leg balancer.

 

[treeness]

The clove can bind really hard if a lot of weight is placed on it, in fact with a small variation of the wraps it can be turned into a constriction hitch which is impossible to untie once weight has been placed into it.

 

[Mahk_Adams]

[ QUOTE ]
...a Stillson hitch (Girth hitch)...

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ahhh....just to keep terminology consistent, a Stillson and a Girth hitch are not the same. A Stilson is an incorrect, though sometimes used, name for a cow hitch, which is what Chris mentions in a later post (I know I still owe you an email Chris). Also, a cow hitch is formed with the end of a line. 'Girth hitch' is now used for what Ashley called a ring hitch or bale sling hitch, i.e. that same formation, but tied with a round sling.


[ QUOTE ]
Tautline, blake, girth, clove will all unravel if not tied off or a stopper knot is put in place

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I've never heard of a Blake's rolling out and really can't see it happening because of the way it is finished. See above about the girth hitch.

 

[Reg]

[ QUOTE ]
The clove can bind really hard if a lot of weight is placed on it, in fact with a small variation of the wraps it can be turned into a constriction hitch which is impossible to untie once weight has been placed into it.

[/ QUOTE ]

All the negative rigging at the start of this video are tied with cloves:

http://www.youtube.com/watch?v=t3Rgvtg4cxs

Not purposely trying to be contrary to your good self or anyone else Ross, but just that Ive never personally had a problem.

 

[treeness]

Yeah I tend to get mixed up in the terminology sometimes. I quickly looked up girth hitch in the ISA study guide just because it was the only text I had on hand at the time and it looked similar upon quick glance (I guess I got way to excited to post ). But pretty much what I call a Stillson is a cow hitch with two half hitches. I find even with knots terminology differs sometimes. My teachers called it a stillson, the guys I've worked with call it a stillson, hence why I have called it a stillson.

The co-ordinator for my program is on a board of tree guys up here that are trying to carve us work place regulations of our own (separate from the construction and farm industries up here), in doing so they test the breaking strength of knots. He said that the cow with two half hitches took more strength required to break than the clove (both were incredible strengths), which is why I tend to tie it more.

I've never had a blake roll out on myself but again I was taught to always finish it with a stopper knot, and so have always done so. I just figured if I was putting a stopper knot in it, it was for the reason to prevent it from rolling out.

I've never really had too much trouble untying the clove either aside from maybe a few times that really don't stand out in my head. It's not a major inconvenience, I just find the cow a bit easier to untie. I still rig with both knots though as well as the running bowline.

Heres a link to a thing about the constrictor knot, which is more so toward the point of what I was trying to drive home.
http://en.wikipedia.org/wiki/Constrictor_knot

Your ground guy had some buttery hands in that vid reg, that lower was pretty smooth. Very solid work man.