Nasty tip over splits house in Santa Rosa today

Re: Nasty tip over splits house in Santa Rosa toda

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Found another article on this accident, turns out the pick came out twice what we think the rated capacity was.

http://www.pressdemocrat.com/article/20091125/ARTICLES/911259959

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Ha!

I quote myself from page two of this thread,

"wow! that pick looks HUGE!

maybe it did weigh too much then.

maybe they underestimated it, maybe the climber called it 8000lbs and the crane put about 8000lb pressure on it and it weighed 12,000lbs."

....and people thought I was way too heavy in my guess (that I took from the aerial photo, btw). I was right on the money!
avid.gif
 
Re: Nasty tip over splits house in Santa Rosa toda

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Was the crane was there to remove the downed crane? why not use it? Save someone's back, knees, time!

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Different crane, different day. Check out the photos..... Precision used two of its own cranes to extricate its failed one.
 
Re: Nasty tip over splits house in Santa Rosa toda

i dont know about anyone else but when i work with eguip
like that i make dam sure every one is on the same page
and there is never slack in anything
i like making pop or hinge cuts getting well clear and letting the crane break them free
i have trouble trusting situations like that to people i
dont work with every day
 
Re: Nasty tip over splits house in Santa Rosa toda

also i guess i dont no much about crane operation
but if u can adjust weight lifting power why would you
try to guess it to the pound?
if it weighs 8 set it for 12 right? or higher
 
Re: Nasty tip over splits house in Santa Rosa toda

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also i guess i dont no much about crane operation
but if u can adjust weight lifting power why would you
try to guess it to the pound?
if it weighs 8 set it for 12 right? or higher

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If youre putting 4k of extra strain on the piece its going to pop off and potentially fly into something or someone you dont want it to! The point is going to the pound exact, its getting within a few hundred on the pretension strain, and adjusting as needed as the pick begins to come free.
 
Re: Nasty tip over splits house in Santa Rosa toda

[ QUOTE ]
i dont know about anyone else but when i work with eguip
like that i make dam sure every one is on the same page
and there is never slack in anything
i like making pop or hinge cuts getting well clear and letting the crane break them free
i have trouble trusting situations like that to people i
dont work with every day

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Dont like putting extra strain on the crane to finish my cut. I am there to make it as smootha dn strees free on me, my guys, and the equipment. leaving a hinge, or snapwood is a last resort to me. cranes pull up and down, not side to side, or back and forth. And they certainly dont like being shockloaded when a piece hinges over and the butt free falls into the load line.

maybe I am misunderstanding your scenario?
 
Re: Nasty tip over splits house in Santa Rosa toda

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...maybe they underestimated it, maybe the climber called it 8000lbs and the crane put about 8000lb pressure on it and it weighed 12,000lbs."

....and people thought I was way too heavy in my guess (that I took from the aerial photo, btw). I was right on the money!
avid.gif


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My crane operator read the report. He said that the climber called it out to be 6,000lbs and it was 12,000lbs.
blush.gif


Dang.
 
Re: Nasty tip over splits house in Santa Rosa toda

Then that climber should be doing pruning work, not crane work where he could destroy a multimillion dollar crane because he didn't feel like making two cuts.

Double the estimated weight is way to far out for an experienced crane removal climber, obviously he was new to it so he should have had sombody there to guide him as to how big of piece to cut.

We thought that the crane only had 6000lbs capacity anyway so he should have cut a 3000lb pick to avoid any overload to the crane, instead he tried to send out 4 times that.

In this case it wasn't how he cut it it was how much he cut
shocked.gif
 
Re: Nasty tip over splits house in Santa Rosa toda

Started off taking small picks, wonder when he stepped it up and flipped the crane?

Using spin cable makes it fun and keeps you on your toes too! Look how those slings wrapped around each other in the last :03 of the video.
 
Re: Nasty tip over splits house in Santa Rosa toda

Nice find James. We pretty much can speculate that he captured the event on video. I'm going to send the guy a message to see if he indeed got it on film.
 
Re: Nasty tip over splits house in Santa Rosa toda

As the tree removal went on the picks got further and further away from the crane, he was set up way far away to start. I think he was light on the counterweights, it's easy being a monday morning quarterback.
 
Re: Nasty tip over splits house in Santa Rosa toda

[ QUOTE ]
Started off taking small picks, wonder when he stepped it up and flipped the crane?

Using spin cable makes it fun and keeps you on your toes too! Look how those slings wrapped around each other in the last :03 of the video.

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BB


What is a spin cable? Looks like somehow nothing rotated until the piece was starting to rest on the ground, then the headache ball started to turn.
 
Re: Nasty tip over splits house in Santa Rosa toda

Spin cable is a cable that when loaded spins tight, and when unloaded spins loose. If you set down the pick fast, the cable will spin ferociously!

Most crane co.'s are using non rotational cable nowadays, but there are still plenty out there with spin cable. Looks like this guy had spin cable, and a spinning ball, but the cable was faster than the ball.

Spin cable and a non spin ball makes for some dangerous work
 
Re: Nasty tip over splits house in Santa Rosa toda

Rotational or spin cable usually has a higher WLL because it has a safety factor of 3.5 to instead of the 5 to 1 safety factor of non-rotational cable.

FYI the safety factors double on both when your lifting personel. rotational goes to a safety factor of 7 to 1 and non-rotational goes to 10 to 1.
 
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