Cabling Advise

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What ever happened to hand wrapping a short span with common grade cable? :) I have not tried the Rigguy system and dont really want to. The whole reason we replace cables that are grown over is to prevent that bending action on the cable. The rigguy system starts off with this problem. I like through bolts, thimbols, dead ends and cable.

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Typically, short spans such as crotches with included bark are more a candidate for a static cabling system with EHS wire rope in which case you cannot hand wrap (splice)such as you can with common grade.

You could rod the lower stem and use a static cabling system 2/3rds up from the codom.

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BMPs, are suggesting that you can use Common grade cable on co-doms with attachment points up to 20" Diameter, with 1/2" cable and hardware. It doesnt say anything that I can find about included bark crotches requiring EHS cable. What it does say is if there is decay, split or other defect (ie included bark) the addition of a bracing rod should be considered.
 
i dont know much about the rig guy system. but from what i understand there is no thimble and through rod, just a straight cable through the hole. so when the tree moves in wind events one would think that the cable moves inside the tree causing friction and further decay. with a trad ehs system there is movement between the through rod and the thimble thus displacing much of the internal friction in the original wound. how does the rigguy compensate for this? or does it?
 
Annual inspection of a Rigguy system I installed in a White Oak is coming up soon. This week I'll check it out to see if cable movement damaged tissue,cable or prevented closure. I'll put up some photos after.
 
Anyone have the link to the Barttlet research on the rig guy cable system? Didn't I recall some weird number like 4-5 year test with no ill out comes? Was some info about the rig guy not failing as much also right?
 
I prefer to use malleable washers in front of the rigguys. You also need to be money on your angles. The use of a laser pointer pen from one hole to the other is pro! I would rather use cobra depending on the situation. If you need to use soft lay, Cobra does the same thing and is less invasive. I have never seen a preformed grip fail, however, that is why a soft lay hand splice is recommended as being stronger. Preformed Grips hold up 65' power poles! usually the cable breaks first.

X-man
 
Well I'm going up the tree to do the prep prune out... Photo's to come soon.

Marlinspiker, Those are my thoughts exactly with the rigguy system. Looking at the info that wesspur has on their website seems like the cable failed just on the inside of the limb/trunk it was installed on. On their control testing it seemed that the eye broke on the forged eye though bolts at the same place where they had the cable fail with the rigguys. It seems as if that was just a weak point with their testing method?

The links are on the top of the page...

http://wesspur.com/cabling/rigguy.html

Photos comming soon... Thanks guys
 
The BMP's are a great resource.

jp
grin.gif
 
just got the lit and man the ansi "book" is a waste of $. The BMP's look like it's put together really well, and easy to follow (pictures! yay!)

Ok I did the prune out and I'll get the pic's uploaded and sized tonight. There are two crotchs where I don't have enough room to install tree wraps (deadends or what ever the dialect is in your area). The tree wraps are aprox 24" on either side, plus the size of the eye. My guess is that in order to use EHS cable you need a min span of 4 1/2'. So that leaves me with common grade, or rigguys (or the like). Suggestions pending photos would be great.
 
are there any rubbing limbs up there? If so you could try bolting them tight to graft for "natural support" not in the bmp; maybe next ish.

might be too late to mention that...

yeah the ansi is $15 worth of overkill info for practitioners compared to the bmp

i've used 3/8 EHS with rigguys to brace with; far less wounding but it cant be tightened easily

nice pics
 
It almost seemed odd that there were not more crossers. It was fairly stormy while I was in the tree so I had a chance to see it moving up close. Any thoughts about bracing that included crotch? The most movement I noticed was the lowest crotch with no included bark (yet). The lowest crotch is so tight my rope gets stuck in it 3' above the union.


Since the tree forks, and then the forks divide once more, for a total of 4 leaders (more little ones in the top)
My plan of attack is:
2 3/4" braces just above the lowest crotch.
2 5/8" brace though the crotch with included bark
1 5/8" brace just above the crotch with included bark
1 5/8" brace just above the matching leader crotch

3/8" EHS cable in a box system. The parallel runs will be staggered for the height requirements for each crotch. Some leaders where the cable needs to be has about 2-3' air space between them. I'm considering just running a though bolt at the 2/3 mark insted of cable since the run is so short. Any thoughts on that?
 
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It almost seemed odd that there were not more crossers. It was fairly stormy while I was in the tree so I had a chance to see it moving up close. Any thoughts about bracing that included crotch? The most movement I noticed was the lowest crotch with no included bark (yet). The lowest crotch is so tight my rope gets stuck in it 3' above the union.


Since the tree forks, and then the forks divide once more, for a total of 4 leaders (more little ones in the top)
My plan of attack is:
2 3/4" braces just above the lowest crotch.
2 5/8" brace though the crotch with included bark
1 5/8" brace just above the crotch with included bark
1 5/8" brace just above the matching leader crotch

3/8" EHS cable in a box system. The parallel runs will be staggered for the height requirements for each crotch. Some leaders where the cable needs to be has about 2-3' air space between them. I'm considering just running a though bolt at the 2/3 mark insted of cable since the run is so short. Any thoughts on that?

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I am curious, why do you think you need to cable it? Is it hazard prevention or customer based?
Jeff
 
No doubt Jon is a guy to go to, but, Jon, why are you so set against Dynamic?, periodic inspections, advantages of a system so easy to install and give consumer satisfaction, You are not given Dynamic a fair shake? Be nice, please.
Jeff
 
Well I got off work and drove to go look at the tree... The "client" is a friend's parents. The tree is basically a headstone for the family pet graveyard. The house is out of range, but the two story shop/upper living space is a target, and there is a shed behind the tree that they are worried about. Not to mention that on the 4th side of the tree there is parking (could park somewhere else).

Since the choices are to cut it down or cable it, and they are friends I told them that I would just charge for hardware.

We are in the middle of a wind storm and I drove out to look at it to see it move. It was very informative, and not to toot my own horn but the proposed placement of braces and cable were fairly close to right on.

The crotch with included bark was opening and closing an alarming amount.

But the they rather see it come down... I'm pretty bummed it's the only largish tree on the property.
 
i got tired of using cables period and now use chain because of it's obvious ease to tighten or loosen. does nobody else out there use chain.
 
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