Heavy Rigging

I only use rescue pullies when the anchor is above the load. If the load is above the anchor I use CMI blocks. I have a few 5/8" and one 3/4". Mike you can post all you would like. The fellow with the yellow hard hat walking the rope is Norm Hall.
 
The pulley looks like a steel block to me.

Could some1 satisfy my curiosity? In the winter picture, is the tree being removed a sugar maple, a linden, or neither? My thoughts, it's probably a linden. If so, that piece with the codominant type stem area weighs somewhere abouts 500+ lbs.(227 kg approx.). If sugar maple, approximately 700 lbs(318 kg approx.). If neither, I figure about 20" diameter, about 5.25 ft long (it's probably longer) + extra weight with a guess for stubs and and the extra wood for codominant stem type attachment.

It looks like a textbook removal to me.

There are still more pics? Great! Can I see them?

Joe

I type too slow.
 
Thanks Mike. I guess my internet tree bark and wood i.d. skills leave a lot to be desired. That to me shows that piece to be around 750 lbs.(340 kg approx.). That's a hunk of wood!

Joe
 
Mike;

Could you post some of the pics that Todd posted on the first page of this thread? I was able to view all of the ones that you have attached, but none that he did. Te problem is probably with my software (or hardware).

Thanks.

Mahk
 
Todd
I am not sure I understand your answer...
Is the pulley you are rigging that trunk wood off of a Stainless steel 4" pulley? If so could you tell us who manufactured it?
Thanks
Frans
 
When I am dropping wood I use Arborist Blocks, not pullies. There is a big difference between them. A pully is designed for rescue, has narrower cheek plates which exposes the rope, they also need another link for attachment.Pullies also have bearings. Arborists blocks are designed for tree work, they have wide cheek plates to protect the rope, they also have a tope bushing to connect a sling. The block used in the photo is a CMI 5/8" block.
 
Good write up. You're fortunate to have the depth of skill available within a phone call. Helps to have gear-heavy friends too :)

Did you drill the trunk to get an idea of the shell thickness before you headed up? If not, did you get a funny feeling in your tummy when you discovered that? I always do, even after drilling.

Doing a job like that with non-dynamic rigging makes it a lot safer. Too bad that more people don't know about this type of work or don't see the value. From your description, any kind of slam dunk rigging could have broken the tree.

Thanks for writing the article.
 
Hi, Todd;

You wrote a respectable article. I think the pictures posted to this thread enhanced things. I'm glad your friend Mike posted pictures of the removal as well.

Some things I would like to have learned more about was the hazard evaluation. What did you do to spend time at this particular tree? Were you sure you would be doing the job before spending as much time as you did there? How long do you suspect you spent setting up and derigging this tree? I know this aspect of the job is time consuming. How long have you been using the 2:1 for bracing purposes? You're a fortunate man to have the right personnel available to you when you need them.

Joe
 
Good questions Joe. The client is a long time past costumer so I was confident we would be doing the work. Plus he is very demanding and there are not too many companies around that would meet he expectations. Although the time spent evaluating trees like this might have been about the same whether we did the job or not. The time spent was doing 3 ristoghgraphs, geting a throw line over each caple checking tention, and evaluating the hardware with binoculars.Plus doing 360 degree inner and outer canapy inspection having to jump fences and explain to nieghbors what I was doing in thier yards.After that I dismanted the tree in my head ( the plan,) to try to put some time frame on it. And tring to fiqure out how many people. This all took about an hour.I have been using a 2-1 rig like in the picture or something simular for a few years when nessacary. If you have a GRCS or 2 ( we now own 2) It is very helpfull but not nessacary. A 5-1 fiddle works well too. It took 2 full days to rig this tree down and remove it through the 36" gate.
 
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