imo you are increasing safety in some ways. However, each pick you make you have a piece that is top heavy causing the load to flip. In crane work you always want your picks to be butt heavy so they do not flip. You also want your loads balanced so they do not move. With this device I see a lot of damage being done to the crane itself. There will be increased shock loading and stressing the components of the crane in ways its not designed for. This can be lessened by going with much smaller picks, but then you have a crane working way below its capacity. We also have a Kboom crane, a 65 metric ton(Effer 655) and the reason we spent the money on it is to go big. The trees in your picture, with the truck that close, appear to be 2-3 pick trees. With that grapple saw on there it appears you are taking pieces that average conventional rigging like one would do while climbing.
Mike Poor has a grapple with no saw for his kboom and he grabs the end of the branch and he drops down to make his cut to keep the pick but heavy. Last I spoke with him, his grapple gets used only on a few trees a year due to its limitations. Most, if not all kboom users, sling their pick with one or more slings to keep tree parts just as they sit in the tree.
It would be nice not to have a climber in the tree, but I would not want every pick side loading my investment. If there was a way for the pick to stay butt heavy/balanced I'd be looking further into purchasing one for our kboom.
So what did you come up with for a rate to sub contract and stay profitable.
I understand the load is allowed to twist on the grapple and the grapple is designed for that, the crane is not.The Mecanil SG220 grapplesaw is designed to give. When you grab a big vertical limb it will allow the limb to tilt down to a hanging position. I bought my crane from Tiffin Crane in Ohio (the largest Palfinger distributor in North America). When their engineers raised that question but we're satisfied when they saw the design of the SG220 and how it works. I wouldn't have had it built if they said otherwise.
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Rates for subcontracting a tree-mek would vary like anything else and the options are many.
It'll happen. It's just a matter of time.I'd really love to have someone near with one so I could sub them on those rare ones. I know I don't have the work to support it tho.
Thanks!Wow what a machine. I've watched many Trac style machines but none have reach nor stability.
What a machine. America is a so so market for this machine but in Europe and Asia it would explode. They have much more respect for the tree industry. They shut entire streets down at night so crews can use massive equipment.
Hats off to you
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