crane tip on youtube, old

theXman

theXman

Branched out member
Location
MD, USA
link: http://www.youtube.com/watch?v=lxX9-dcJ7NA


this is an old one from youtube, but if you haven't seen it, it puts some fear in ya if you do tree removals with cranes.

fixed camera, so you don't see the ground, but you can tell a lot from what happens.

trunk weight is at or above cranes capacity.

guy cutting must be about 15 feet off the ground making the cut.

crane is on another higher road.

the cut trunk rotates maybe 180 degrees, wildly. I believe maybe the choker on the trunk was placed wrong, half wraping around the trunk after going through the eye. as it rotates wild, it throws even move weight out of the cranes confort zone. This shake likely slides an outrigger or two off of their blocks.

outriggers go down threw the pavement/ground.

tipping the crane, the cut trunk drops the 15 feet to the ground and there is a pause...

then the log flops away from the crane, really then yanking it over fast.

you can hear the crane engine trying to run in the upside down position, fan blades and belts rubbing.

In this position; of a log taking you down, what should you do as a crane operator?

I think just drop that boom as fast as you can. Hard to say when a climber might be in the way though. This operator sounded like he keep trying to rev it up and raise it.
 
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outriggers go down threw the pavement/ground.


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what, you've never seen this? those outrigger feet can go through the road like butter, once they get started.

well, i guess i havent seen it on an actual road, but a paved driveway.
 
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link: http://www.youtube.com/watch?v=lxX9-dcJ7NA


this is an old one from youtube, but if you haven't seen it, it puts some fear in ya if you do tree removals with cranes.

fixed camera, so you don't see the ground, but you can tell a lot from what happens.

trunk weight is at or above cranes capacity.

guy cutting must be about 15 feet off the ground making the cut.

crane is on another higher road.

the cut trunk rotates maybe 180 degrees, wildly. I believe maybe the choker on the trunk was placed wrong, half wraping around the trunk after going through the eye. as it rotates wild, it throws even move weight out of the cranes confort zone. This shake likely slides an outrigger or two off of their blocks.

outriggers go down threw the pavement/ground.

tipping the crane, the cut trunk drops the 15 feet to the ground and there is a pause...

then the log flops away from the crane, really then yanking it over fast.

you can hear the crane engine trying to run in the upside down position, fan blades and belts rubbing.

In this position; of a log taking you down, what should you do as a crane operator?

I think just drop that boom as fast as you can. Hard to say when a climber might be in the way though. This operator sounded like he keep trying to rev it up and raise it.

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The simple fact is the piece being hoisted was far in excess of the cranes safe working load. This accident happened because of climber and crane operator inexperience.

I remember one crane job we did in VA, where we had to the use stinger on the boom to reach a tree, the climber made the cut and the crane attempted to lift the top and the back wheels and outriggers came off the ground about 4 ft, I was standing 10 ft away from the crane and damn near shat myself!!

Anyway the crane settled down and the other guys starting whooping and holering like chimps in a lunatic asylum.

It was scary.
 
I recently put big holes thru a black top road. Reset with 6' long dunnage. As I was moveing the craane back out I saw way too much flex in the dunnage and the edges were sinking in. I stopped and did the tree by hand. Had I not noticed the first time it would have been bad. There was underground water flow in gravel/sand and it was like quick sand under the pavement.
 
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what, you've never seen this?

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I've never seen it happen when the proper outrigger pads were used.
 
At the very end of the clip I saw that someone was being hoisted by a crane. Could they have righted the crane and used it again or is that bad editing and the clip should be at the beginning?
 
definitely bad editing I think, that crane had to be trashed for quite a while.

plus, it looks to me that the trunk is there in that view, just hidden behind the others.

looking at it again, looks like the outriggers are set up very close the roads edge, near the drop off.
 
I think he would have been ok with the pick if he had the boom raised with more pressure. I rather swing the peice in a little towards me than to let it swing away from me. Also helps account for any boom flex I'll have under pressure.
 
About ten years ago I was on a crane removal with my boss at the time. He did the climbing on a big poplar and got it down to just the trunk left. I guess he had enough time on the spurs and wanted down. He wanted to set a choker and come down to cut it at ground level. The crane operator told him that he thought the piece was to large and all he could handle was 7 tonne. My boss said it was only about 5 tonne got down on the ground looked at me and winked "it's really about 10 tonne but he's just being to conservative, he can pick it up". Well, I believe that if the crane operator hadn't been doing it for 30 years it would have ended like this video. When the crane started to tip he imediately let the line run so the but sat back down. Oh ya the tree was between two big houses and the hydro(the big lines you know powering half the city) crossed the road in front of the crane. He held the piece in that position for quite a while as he sent his apprentice for the other crane( not sure what we could have done with it anyway). Before the apprentice got back he slowly got the trunk close enough that he could handle it. If we had an unexperienced operator that day or he was of his game I'm sure it would have been a pretty ugly day. That was an early lesson for me not to BS someone about weights or what I think for that matter.
 
Yeah, this is a "oldie but a goodie" video. I don't like watching crane accidents. They happen slowly; slow to a viewer, but so fast for the folks involved. And I don't like the sound of metal crunching. Just all to skeery for me.
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It is something I never want to experience.
 
In Toronto Earl's Crane Service has some really good operators. Wondered if it had been them.

To clarify, I wasn't thinking of you divulging the tree service name, just the crane co.
 
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