Cabling and bracing study material

I do go with thru bolts. I had some issues with the little cable clamps one time. I guess I got the wrong strand stuck through the little center cone?
 
Okay. We got the go-ahead, and I found out today. Boss says go do it, so I'll be taking a lot of pictures.
I really wanted to have a chance to look and plan more.
 
Some years ago penn state university brought in a japanese master to design and install props on a 100 year old plus japanese maple. I happen to be on vacation there and if I get s chance to take some photos I will post them. The work is awe inspiring.
 
Okay, so I have heard more of the story today.
The tree was measured about three years ago to have a bigness index of 299.
Over the last year, the root plate has pulled quite a bit, as well as two leads separating a lot from the largest and smallest one.

It is definitely a pickle. I think we can prop it against the root plate shifting, but the two short props that were the original plan are not going to be enough.
The cabling should be pretty straightforward, besides that we won't be bracing the union, but running a low cable as well as one in ~6" wood on the two leads. I think a hub is probably our best bet in order to keep the angles of support in line with the direction of lean.



How hard is this species to root? The only long term solutions that I see holding up to major weather events are establishing the fifteen or so branches that can be made to reach the ground or building a huge propping scaffold type network. I'd rather let the tree do the work.
I took a bunch of pictures of it today, we had some stuff to do at the shop and mostly removed large, dead wood for a few hours.


I am sorting pictures and will be posting them as I get em lined out.
 
These are from the tree before we really started anything.
It has some pretty big defects.
 

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So, with props near the base of the tree, would we not increase the chance of catastrophic failure because of the change in the direction of force on the roots with so much weight beyond the props?
I'd really like a few set pretty far from the trunk to keep the base from being tugged out of the ground in a big gust.
How do you design long props (20 feet or longer) that interact well with the tree and still provide resistance to toppling? How do you attach them?
I know that it is a technique more for protecting unions than root plates.
I have some concerns, and I am afraid that I am not going to be given a ton of time to address them.
 

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I could see a 30 foot galvanized steel post prop embedded in concrete.

If the root plates lifting, reduction pruning's the logical choice, short of a heavy duty prop, in terms of tree longevity.

Quite a challenging tree to either cable or brace, and certainly appears to be in need of both, bigly.

Best of luck mate, nice pics too.

Jemco
 
Triangulation, with a Y at the top, broad base at the bottom, on two raised concrete pillars, at just the right angle.

Quite doable IMO.

I've cabled more than a few big decurrent historically designated monument trees, and follow up maintenance of the system's a must.

Jemco
 
Triangulation, with a Y at the top, broad base at the bottom, on two raised concrete pillars, at just the right angle.

Quite doable IMO.

I've cabled more than a few big decurrent historically designated monument trees, and follow up maintenance of the system's a must.

Jemco

I am actually not worried about the cabling portion. It looks like a hub connecting the three primary leads will give me enough support and in the right directions.
This customer has a good budget to sustain this tree, and we will be visiting it regularly for the foreseeable future.
 
A300 and bmp for starters. I'd be up to come out and help if the timing could work out.
Man, I can't believe that I didn't respond to that. I'm sorry.

It is possible that some seasoned input would have been very helpful, and I also had far less than enough notice on this job.
 
Hub and spoke with EHS cable and throughbolts'll work.

Chicago drop forged n galvanized!

Keep us posted on your progress mate, cool thread.

Jemco
 

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