threaded rod inplace of short span cable?

[mtbmxrider]

I am new to this site, searched a bit, hopefully not re-posting a frequent topic (I sorta doubt it)

Anyway- I have done a bunch of cabling (enough to have a decent grasp on the mechanics of it). I have a situation I've seen but never done before. about 40-45' hemlock, at maybe 20-25 feet, the stem divides to 2 leaders, from the ground it appears the crotch may have some ingrown bark (sorry for my lack of a better term here) and could potentially be a problem in the future-right over a porch too. The leaders stay within (about) 8-10 inches from each other for the remaining height of the tree, at least for the area in which I plan to brace. I have seen similar trees braced with cable where the splices are only an inch or so apart. My question is rather than placing a 8-10" cable, is there any reason why I couldn't use a single piece of threaded rod, as you would at the crotch, 2/3 the way up from the split. I have made a terrible ms paint sketch of the situation. Thanks for any and all help.
View attachment 232332

Two side questions: I've never used "dynamic bracing" such as Cobra bracing etc. Anyone have any experience with it, or could anyone tell me what it's superior applications are?

Are two main leaders considered co-dominant stems regardless of height in the tree in which they are approx the same size when they split, or is there some sorta of height based percentage that designates co-dominance?

Sorry if any of this sounds stupid, Im trying to learn as much as possible online and in the field before I begin classes to become certified.

 

[tree md]

Whatever you do I would not go with the rod and nut. I had to remove a Black Walnut yesterday that had the main codominant fork reinforced with that exact hardware and the whole spar beneath it was full of water, rotten and hollow from that handiwork. I got soaked when I stuck my saw into the spar to drop it. Water stunk to high heaven.

 

[ROPECLIMBER]

The term you were trying is
Included Bark
Codominant stems have no branch collar,no branch protection zone, no parent stem to branch union, and can occur at ground level, all the way up the tree, and even off a main leader forking out away from the parent stem, out on a lateral limb.
the included bark occurs do to the equal growth pushing against each other which forces the bark inward just the opposite of a branch bark ridge where the branch grows and pushes up against the parent stem.
Bracing is not recommended where there is air gap because as the two stems grow they will push on the brace causing seperation or splitting down lower.
Dynamic cableing is recommended in more britle spicies like pecan or maple as it alows the full tree to act as a natural long spring in wind, heavy rain, and snow unlike static cabling where your spring starts at the cable up making a strong but ridged short spring, alowing tree to usually fail at cabling point.
You may want to use a combonation of the two with the brace rods just below stem seperation, and a double sling type dynamic cabling at 2/3 up the tree this way you can re-adjust more times than(you could with drilled spliced eye and eye bolts)as the stems grow closer together each year, being they are already 8" or so there isnt a lot of room for growth adustment with the conventional static cabling.Hope this makes sense
Paul

DICT2003 makes a good read

 

[mtbmxrider]

thanks for the great explanation & resource!

 

[ShermanC]

From what I see no one

I am new to this site, searched a bit, hopefully not re-posting a frequent topic (I sorta doubt it)

Anyway- I have done a bunch of cabling (enough to have a decent grasp on the mechanics of it). I have a situation I've seen but never done before. about 40-45' hemlock, at maybe 20-25 feet, the stem divides to 2 leaders, from the ground it appears the crotch may have some ingrown bark (sorry for my lack of a better term here) and could potentially be a problem in the future-right over a porch too. The leaders stay within (about) 8-10 inches from each other for the remaining height of the tree, at least for the area in which I plan to brace. I have seen similar trees braced with cable where the splices are only an inch or so apart. My question is rather than placing a 8-10" cable, is there any reason why I couldn't use a single piece of threaded rod, as you would at the crotch, 2/3 the way up from the split. I have made a terrible ms paint sketch of the situation. Thanks for any and all help.
View attachment 232332

Two side questions: I've never used "dynamic bracing" such as Cobra bracing etc. Anyone have any experience with it, or could anyone tell me what it's superior applications are?

Are two main leaders considered co-dominant stems regardless of height in the tree in which they are approx the same size when they split, or is there some sorta of height based percentage that designates co-dominance?

Sorry if any of this sounds stupid, Im trying to learn as much as possible online and in the field before I begin classes to become certified.

answered your inquiry three years, six weeks ago.

I am new to this site, searched a bit, hopefully not re-posting a frequent topic (I sorta doubt it)

Anyway- I have done a bunch of cabling (enough to have a decent grasp on the mechanics of it). I have a situation I've seen but never done before. about 40-45' hemlock, at maybe 20-25 feet, the stem divides to 2 leaders, from the ground it appears the crotch may have some ingrown bark (sorry for my lack of a better term here) and could potentially be a problem in the future-right over a porch too. The leaders stay within (about) 8-10 inches from each other for the remaining height of the tree, at least for the area in which I plan to brace. I have seen similar trees braced with cable where the splices are only an inch or so apart. My question is rather than placing a 8-10" cable, is there any reason why I couldn't use a single piece of threaded rod, as you would at the crotch, 2/3 the way up from the split. I have made a terrible ms paint sketch of the situation. Thanks for any and all help.
View attachment 232332

Two side questions: I've never used "dynamic bracing" such as Cobra bracing etc. Anyone have any experience with it, or could anyone tell me what it's superior applications are?

Are two main leaders considered co-dominant stems regardless of height in the tree in which they are approx the same size when they split, or is there some sorta of height based percentage that designates co-dominance?

Sorry if any of this sounds stupid, Im trying to learn as much as possible online and in the field before I begin classes to become certified.

 

[gorman]

I have a tree I'm working on with this exact scenario. A five foot threaded rod span about ten feet above an included bark Union. I'm taking some weight off each side and installing a cable above the rod. I really don't want to risk the consequences of cutting the rod.

 

[ShermanC]

I have a tree I'm working on with this exact scenario. A five foot threaded rod span about ten feet above an included bark Union. I'm taking some weight off each side and installing a cable above the rod. I really don't want to risk the consequences of cutting the rod.

 

[ShermanC]

Since the last time about six or seven years ago I had to cut tree rod and HS cable using a hacksaw, I bought a 3" rotary cut-off tool for HF and a heavy duty 100' power cord. This will provide the right tools for cutting at the job site.