Nasty Rigging Job

chris_girard

Branched out member
Location
Gilmanton, N.H.
Here’s a nasty Mulberry tree that Porter and I removed the other day. The majority of the codoms were compromised with vertical splits running through them. Each one of them displayed some form of primary failure. The main trunk also had a major split running through it straight down into the ground. The tree was adjacent to an historic house and a NH State Highway. There was also a telephone wire running beneath the lowest branches on the right side.

I sounded around the trunk first and found solid wood, so I was confident that after I reinforced the trunk and leaders with load binders straps and extra slings, it would be safe to rig small to medium sized pieces off of.

All wood was rigged down with the GRCS except for the last 25' of trunk wood, which we were able to fell into the brush pile on the left side. Since it was just Porter and I doing the work, there were times when I needed to control the butt end of a piece being lowered. I used a medium sized porty and 1/2" lowering line to control the movement.

We kept the loads small and manageable, as the splits throughout those leads were really scary looking, even after being strapped together. I also used 3 Hobbs blocks redirecting the loads back to a main leader when we removed the branches, so that we could minimize the forces at each rigging point. Trickiest part was removing the branches away from the roof, because I really didn't have as high a leader to use as a Gin pole as I would have liked.

Our landing zone moved around a bit as we worked our way around the tree. Porter did an outstanding job of “Minding the Lines” as Gerry Beranek says and keeping the LZ clear to work around. He is only 20 years old and shows a lot of potential in the tree care industry.
 

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Nice work, Chris....dicey structured tree, no doubt!

Not enough room to fell the tree, it doesn't look like?

Not to be critical, but why lower anything but the brush over the house? With all that room, I'd have bombed 16" to 16 foot sections?
 
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Not to be critical, but why lower anything but the brush over the house? With all that room, I'd have bombed 16" to 16 foot sections?

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Roger, I was able to cut and chuck a few 16"-20" pieces, but most of the wood was leaning over the house or the side street, so there really isn't as much room as it appears.
 
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WOW! Impressive securing and rigging. Job well done.

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Thanks Norm and Sean.

This tree had me thinking from beginning to end, but it was a lot of fun too.
 
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The first thing I think of when I look at those pics is how dam heavy that stuff is! Nice job!

-Tom

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Thanks Tom. Boy, you've got that right. I haven't worked with a lot of Mulberry before, and I was surprised by the weight of those pieces as we were bucking it up.

What a beautful yellow grained wood though. I was hoping to find some nice burls in it, but there weren't any. I know that The League Of New Hampshire Craftsmen are always looking for interesting pieces and Mulberry is known to have some nice grain patterns.
 
}One gr]oundie! Wow, the man must be amazing! N[ice acc]om\pli]shment.

Mulberry is pretty. I found some ch[aracter \pieces f]or m[y Dad
t]o turn.

It is dense and straight grained so it would seem to be a natural firewood. That is until you go ]out and smell the smoke! Burnt cowpies smell better...your neighbors will not be happy. Mine weren't the one, and only year that mulberry was mixed into the pile :)
 
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Nice work Chris, lots of prep work aye!

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Thanks Reg. Yeah there was lots of prep work, a lot of it in my mind in the days leading up to the takedown.

You know how it is is. You always take the tree down many times in your mind before you even set one foot in the tree.
 
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nice seeing a manual td! good stuff.

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Thanks oldirty. When I first looked at the job with Porter, I was thinking that we would need to bring a crane in to do it safely.

After looking at it a little more closely, I came up with a rigging plan to remove it safely.

Besides the load binder straps and the extra slings, we used an assortment of multiple blocks and redirects.

One of the reasons that I did not try to just bomb out big pieces, was that I wanted to leave a few well placed limbs (leads) in order to
utilize the multiple blocks in a kind of laced pattern in the areas that were really structurally compromised. This allowed me to actually use the rigging/lowering line itself as a temporary cabling system to bind the stems together.

By also using the multiple blocks throughout the tree, I was also able to direct the loads more on the trunk (stems) which allowed me to use the column strength of the tree, instead of relying on the strength of just the limbs.

Speed was not the concern on this particular job, so Porter and I just took our time and came up with a safe and efficient job.
 

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