Crane accident 8/31/21 Washington State

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Eric H-L

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I saw a post from Rico but could not open the attachment. If you go to Facebook you can open this. there are few details but some dramatic images. I don’t want to jump to any conclusions. Will await more info.


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If you look at real estate pictures of 260 SW Edgewood Ct Issauqua WA you can get more angles on the site location. It looks like there is a large patio and 2nd story porch and then steep, heavily wooded ground directly behind the house.


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I'm not a crane guy, but the pretty tall stack of cribbing for the outrigger pad near the garage seems odd. Especially compared to what looks like a much shorter pad closer to the street. But things could have moved or changed during or after the accident.

The outriggers don't appear to have failed nor did the ground sink under them. I'm wondering what else besides exceeding the load chart would make a crane tip over like that along the long axis. What do you crane gals and guys think?
 
I'm not a crane guy, but the pretty tall stack of cribbing for the outrigger pad near the garage seems odd. Especially compared to what looks like a much shorter pad closer to the street. But things could have moved or changed during or after the accident.

The outriggers don't appear to have failed nor did the ground sink under them. I'm wondering what else besides exceeding the load chart would make a crane tip over like that along the long axis. What do you crane gals and guys think?
The big stack of cribbing just means that the driveway was not level. Not unusual at all, and the fact that the cribbing was still in place after the accident leads me to believe that the cribbing was set well.

Cribbing has to be stacked high enough to allow the outriggers to level the crane, so whatever is necessary is what is used. When a crane is nose-uphill like that it takes more height, and therefore more cribbing, to level the crane so that it can operate. We have worked on stacks far higher than that on quite a few occasions, although shorter is always better if you can do it.

My thought is that they exceeded the lifting capacity of the crane. Not sure how, whether they did it by lifting too much weight, or by allowing a pick to swing away from the crane, and through dynamic loading, tip the crane. While that crane does not have an Over The Rear chart that would allow it lift more over the rear the way it was working, it is still stronger over the rear, so it should have been able to lift more weight there than the chart says. My guess is that they just picked up something heavier than they expected, and over it went.
 
King News, Komo News and the early Tweet from local EMS are all contradictory on number of injured and if the house was occupied. The Komo News story seems the most detailed and includes interview with the occupants of the house. Komo News reports that the crane operator was able to exit the cab of the crane after the accident unharmed. The homeowner was in house with daughter but neither was injured. Komo news reports only one climber injured in one sentence and two climbers injured in another. I suspect that once the dust clears it may be two fell and one climber was injured and treated at Overlake in Bellevue and another was evaluated at Overlake Medical Center to make sure they were ok. (Edit: i may be wishful thinking and hoping it’s only one injury. I should not be speculating. Lots more articles say two injured. This is the only one that says one injured *and* two injured.)
I will paste the Komo article here:

Komo News: ISSAQUAH, Wash. -- One person was hurt when a large mobile crane used to clear trees toppled backwards Tuesday morning, crashing into the garage of an Issaquah home, authorities said.

First responders said the victims fell about 15 feet from a tree before being rushed for treatment to Overlake Medical Center. Information about the victim's condition was not immediately disclosed.

A worker who was in the crane's cab was able to crawl out after the accident and was not injured. Two people inside the house were not hurt during the incident, which occurred at 11:45 a.m., officials said.

The Washington State Department of Labor & Industries dispatched a crew to the site to as part of an investigation to determine what happened.

Eastside Fire and Rescue Battalion Chief Mark Vetter said it was a freak accident.

"To roll up and see this is not something you normally see," he said, adding that the removal crew likely did not accurately estimate the weight of a tree fragment that was being hoisted up. "The weight hit that crane and pulled it over right through the house."

Trista Oliva, who lives in the home, said the tree in her home's yard developed an 8-foot long crack that may have collected water inside, which may have made it heavier than the removal crew estimated.

"I was on the other side of where the crane is (and) I saw the wood going the wrong way," Oliva said. "I hear my daughter go, 'It's falling!' I was in the middle of a bagel bite and I just jumped out of my desk and ran. And then I heard the crash."

Officials said the crew had been hired to remove trees from the back yard of the property.

The crew decided to cut a large maple tree into pieces and use the crane to lift the discarded tree pieces over the house when the accident occurred.

Oliva said she, her daughter, two cats and a puppy, were inside the residence when the accident occurred. No one inside the house was hurt during the accident, which left a crack in the wall of the home's master bathroom.

"You can't really tell anything happened" inside the house, she said.
 
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East side tree works aka YouTube guilty of treesson.
local news says two injured and no one was in the house at the time. Makes my mind think it’s the climber and crane op..
To be clear the HO and her daughter WERE IN THE HOUSE when this occurred...
 
I was shocked at how rookie they were trying to lift a windthrown fir's chunks off the ground with their crane. As simple as cutting on two slight angles, and enough wedges to prevent the pinch, but were locked into making square cuts.

Not knowing the difference between cable-up and boom-up to tension pieces when they first got the crane...surprised at dropping pieces onto the crane.



An expensive crane comes with no good- judgment included, just an expensive crane, and payments to make.

A fancy crane impresses the neighbors, until it's in the house.

Seems they aren't very much of a safety- culture around there, having just nearly killed a 19yo who was sent to a tree, tying in with a half-hitch or similarly deadly application of the wrong knot.
 
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