@0:34 you can clearly see he has what is called “broken track”. If you look at the right hand track frame look closely at the bottom left rear. The gap between the frame and the treads is slightly wider than in the front. That means he is getting “light” and on a critical pick like this, usually 75% or more of capacity of chart, everything should of stopped right there. Once he started to move a heavy load like this will NOT move perfectly with the boom tip and just a few inches outside of radius and already light and you see the result. Ran crawlers like this for years and said no to a pick more than once. They always listened because they knew if they got someone else and this happened after a certified operator said no it was gray bar hotel for them.

It is amazing how many crane experts there are on the internet.

After the signalperson walked away from the right side of the crane while the crane was moving, the treads began to lift at 0:55. Stability was lost when the treads came off the double stacked sheets of steel at the front of the crane (rear from your view point) and the uneven distribution of the weight (not all treads are in contact with ground nor sheet steel) led to increased ground compaction that led to a tipping condition. Since this is a critical lift, there were inadequate ground preparation for the lift and not enough signalpersons/riggers to watch the condition of the crane during the lift.

That’s an expensive mistake

What we call a 'tray lift' tray being the floating counterweight behind the main counterweight of the crane. What's tricky about these types of lifts is your working radius is very limited because you have to be at certain radius in order to float the tray (meaning as you pick the load the tray of counterweight leaves the ground in order to counter the load, if it's on the ground then it's not counter to the load and you couldn't move the crane either). The crane is very limited as to how far it can boom down (move the load further away from the crane, increase radius) or boom up (move the load closer to the crane, decrease radius). If you boom up to much then the tray will no longer float, essentially it's a very sophisticated balancing act between the counterweight and the load. Extremely poor shoring/matting underneath the crane as well here, probably not level either and on a tray lift you rely very much on pick and carry, good level matting is essential because you need the tracks to move the load, not the boom. Couldn't really tell from this video close up if the boom was moving at all, from what I can tell it looks like this was a near or over capacity lift from the start. If the ground was sloping to the front and the operator, as you can see, started backing up that momentum of going slightly uphill may have been all that was needed to tip the crane over. The operator must be part feline as you can see he escaped from the cab.

Love how the supervisor just takes off his hard hat and walks away.....no concern for anyone who might be injured.

Supervisor - "And THAT, Johnson, is why we wear hard hats".

This video is italian: "Watch out watch out" "GO GO GO!" "Oh holy Mary what a disaster, nooooo, nooooooooooo" "I said it, i said it" "Oh my God oh my God Oh my God" Really desperate...i feel so sorry for them :( Ps: 1:22 see the guys come out from the dust...a miracle

When the crane reverses back, it reverses off the front pad, You can see the space. Its at that exact moment that the crane starts to tip forwards.

Driver; So I'm back again tomorrow or nah?

The ONLY thing that matters is that no workers are injured, everything else will be covered by insurance!

the crane collapsed because there was an aquifer not reported or detected underground, this caused the sinking of the left track (min. 1.01) with consequent imbalance of the crane.

I’m speculating that the crane was simply boomed out to a lift radius beyond its tipping capacity. The suspended counterweights are not uncommon for heavy lifts and the ground looks to be very stiff and did not give way under the tips of the crane tracks.

It’s “Break time guys!!!!”

Danny davis, on cranes that big, there are drive motors on both the front and rear of the track frame. He walked out from under the load. The spotters should have stopped him when the counter weights began to rise from initial elevation

Compute the weight of the load and see the CAPACITY CHART before operation,

Очень и очень огромная беда. Дай бог, чтобы все остались живы. Печально, что все рухнуло.

In the evening of the 9th of May, a large crawler crane collapsed in Varese, Italy while lifting a large section of a new viaduct at the Arcisate Stabio railway yards. The piece of concrete bridge was never put into place, as the Vernazza-owned crane lost its stability and overturned, dumping its load on the ground. Although several people were on site watching the operation, luckily no one was injured. The crane’s operator is also safe, as he managed to get out of the cabin in time, jumping from a height of nearly three meters. The next morning, the technicians made an inspection in order to evaluate the situation and the time it would need to remove the crane, while the outsourcing firm Salcef is investigating the causes that led to the crane’s overturn. According to the first information though, the problem lies with the machinery, not its operation. Despite this failure, the railway owner company Rete Ferroviaria Italiana (Rfi) confirmed that there will be no slowdown in the works to complete the new railway line, which is expected to open in December 2017.

I want to know who approved the crane to move fully loaded on an uneven surface. Absolute insanity.

Is that the general contractor crying??

On one hand: that's awesome On the other: that looked expensive

So that means we're not going home at 5??? 😁

Looks like they were trying to reposition the ballast when the failure occurred. Probably not a good idea to reposition that thing when you're fully loaded.

Counter weight is less & uneven Ground surface . thats Counter weight is acts up to 100% of load can handle at flat surface ground. when chain mounted run as angle position load impacts on boom .

The problem started when the crane started to crawl backwards would of shifted the weight causing the load to swing

You guys realize this happened because of 3 things. First the toes of the crawler went between the 2 pads. In turn this made the load to go away from the crane. Second, the crane was at max capacity. There was no room for error, especially the load going farther out. Lastly, this will go down as operator error. It is the operators responsibility to make sure the pads were put together so the toes wouldn't drop. If working close to max load capacity everything has to be right or things like this happen.

Also notice that at 1:01, the front/toe of the tracks are off of the matting material which removed all of the front support and allowed the crane to tip even more once the counterweights moved forward. You would be surprised at how a mere 6 inches of wood could have helped prevent this as well as having proper counterweights on the rear of the crane.

The banksmen did a great job there! Just stood watching for several seconds while the counterweight rose up off the ground then shouted then ran off!

Guess Someone miscalculated the counter weight.

How did that operator not die! Holy smokes. Narrowly escaped at 1:20

Daaammmnnnn!! I bet that guy shit his pants when he realized how close that counter weight was to crushing him.

"Noooooo, nooooooooooo, nooooooooooooo, NAAAAAAAAAAAAAAAAAAW"

I can't believe the guy that looked like the foreman just walks away from it instead of checking on the crane operator or any of the other workers.

Okay after watching the video a few times I think I know what happened. So if you notice at the start of the video the counterweights are really close to the structure they're building. You will see the crane operator is backing up and also pulling in the counterweights so that when the crane swings to put in that new concrete piece the back of the crane will clear the steel framing behind it. Well when it was pulling in the counterweight it messed up the balance and the crane toppled over. That is my guess as to what happened. These crane operators are usually fairly educated. I'm surprised that they made this mistake.

How did the guy at 1:22 make it through that lol?

I would like to hear the reasoning for this collapse after the investigation. I have operated cranes, 999, and 888 with 300+ booms. the operators first responsibility is to know the weight of the pick and then to know if the crane can handle it. also wondering if the oiler was operating at the time???

No one on earth can make me laugh just by running around and yelling "OH!" the way northern Italians can make me laugh just by running around and yelling "OH!"

Someone didn't do their calculations rights

Русский язык на такие случаи по богаче будет

because the Operator did not release the load at the time of Eskairosse lift hears a very big mistake there in the operation

Esse engenheiro aí dessa obra ficou bem famoso com essa cagada

Did they know what the charts showed as far as how far from center pin they could go with this much weight ? They should have boomed up to bring the load closer to the crane.

“NOO” “Nooo” “NOOOOOOO” “NoOoOooOOOO” “NoooO”

Everyone making jokes about the guy crying, the guy is obviously injured somewhere in the back ground.

Лайк если зашел прочитать русский коммент

Notice how that 1 guy walked away from the crane instead of going towards it to help like everyone else did and that person howling loud as isn't helping

Look at the leaves blowing on the trees in the backround. That should have told them its prob not a good day for crane work

Insurance guy : Ok ima need everyone and I mean everyone to give a urine sample 😨🤔🤣

Very risky because a crawler crane with no outriggers. This type of crane has a very small "footprint" and is subject to tipping as a result. Looks like they miscalculated the extra counterweight that you can see suspended at the back. The main counterweight is on the crane. You can see both counterweights swing to the left as the whole assembly tips over. Even if there was an alarm when it started to tip it is unlikely the operator could have lowered the load fast enough to avoid tipping. Yes, it would be great if a crane operator could comment. Yes, obviously the counterweight on the crane and the extra one hanging at the back were not enough for the load and the length and angle of the boom. It looks like the beam they were trying to put in place was much heavier than they were told it was. Unfortunate that this happened. There must be a report on this somewhere. The damage is extensive. There goes the contractor's estimate! senior engineer.

Something all have missed is the Drive Motors should have been to the rear and helped with additional weight from the Drive Motors and additional steel and castings and it might have made a difference. All the old cranes and load ratings were based with Drive Motors or chains to the rear and the front idler being blocked for maximum lift.New Operators all depend on the computer and lack experience of lifting without all the safety that does it all for them.

I believe that helicopter pilots can jettison their slung loads in an emergency. Could someone in the crane industry explain why a crane operator cannot/should not jettison the load to save the crane in a tip-over emergency? Is it not technically possible? Why not?

Look At 1:22 he jump off the crane that a lucky guy !!!

AND!!! they should have been on mats instead of stair stepped plates. The engineering of the whole critical pick is as much or more to blame as the operator and ground personnel

Not enough counter balance.

The management run the other way with hands on their heads. The men run straight in to rescue their mate. Telling.

That looks like in Ame. Large mistake they made was not using two heavy cranes to lesson the load on one.

cause of the building behind ,While the crane was walking reverse the crane operator make a mistake such as rewinch the derrick boom to the main boom and it make serious change of central gravity to front of the crane.

A happy crane salesperson somewhere.

What is the weight of the load? what is the rated capacity of the crawler crane?? what is the weight of the superlift?? what is the radius in front? what is the radius of the superlift counter weigtht??

😂😂😂😂 the way how dude saying nooooo like he got his report card in got straight f on it in knowing he got a ass whooping waiting for him 😂😂😂

The whaling man's rambling can loosely be translated to: i am so screwed. I am so so screwed. I would of faired better underneath it all.

Nice view

I dont think the load they are lifting are not compatible or lets say is not the exact counter weight of the load they should add more because when it bounce even a little the load will doubled the capacity so the suspended counterweight will help to balance the capacity and i notice why the tracks moves backward...

I don't know why these crane operators done just ease the load down!

Best worker that day: cameraman.

Hope everyone is ok

Hi Mi. Did you shoot this video - or know who did? I'm a documentary researcher in Toronto looking for permission to use it in a media project. Please let me know. Thank you.

Ehi Mi Li, hai un indirizzo e-mail a cui potremmo contattarti in merito a questo video? Saremmo interessati a parlare di una licenza d’uso del video, se fosse possibile (ad esempio tramite e-mail). Ciao, Felix :)

That seemed like an extremely ambitious lift

Вот так , за 2 минуты становяться банкротами)))))

"Naaaaawwwwwwww"! That must be site Manager XD!!

This is why you feel what you are doing

1:34 "Porcudio, quest' chi l'è un disastru"..... 😅😅

It looks like the front end of the tracks were originally on a block of some sort. When they reversed and came off the blocks it would've brought the boom out further than planned maybe or caused a pendulum effect

I guess his ass sensor didn go off 😂😂😂😂 been whole lot cheaper to drop the load

эпично. даже мне с дивана виднее что эта хрень которую он тягал раза в 3 его тяжелее.

Looks like they need a crane for the crane.

WorkMan Running from di back sleep on di same side,u lucky..

lmao sometimes i am just surprised at how chilled people are. i mean considering the weight of all this shit collapsing, stuff can be hurled hundreds of meters still killing you... the one dude just sorta sidestepped that shit and half-assedly powerwalked for a couple of meters

Guess they don’t have OSHA 🤙🏻🤙🏻

*NICE~*

at 1:22 - 1:23 that guy jumps/falls out at the very base of the crane and runs away as it all came crashing down.

The problem here is that the counter weights were hanging in the air. Had they been stationary then the crane would not have collapsed. Since they were in the air, they were allowed to move forward, towards the suspended load. That then changed the center of gravity as well as countered the counter balance effect of the counter weights. If you notice, at :50 on the film, the suspended weights start to move toward the crane and that is also when the rear of the tracks start to lift as the crane tilts. Had the spotter been doing his job and noticed this, he could have told the operator to "ALL STOP" and then lowered the load and avoided all of this. But as I said before, this was set up to fail from the beginning when the counter balance weights were allowed to swing freely. Stupid people get stupid results.

They should have maxed out the flying counterweight! If the counterweight comes near the crane only weight can save the lift! If you wanna do it with less weight then you have to lower the derrickmast backwards and the counterweights higher for increassing the center of gravity! And make shure that the weight can,t go towards the crane! Else it,s game over!

Il pensionato esperto di carichi: “l’ho detto io, lo sapevo”. ✈️✈️✈️

It hurts my mind... it’s hard to see

Very tragic. Sad to watch. Better learn from this

It's a good thing they were wearing hardhats

Thank God the top assembly rotated to the side because if not for that the operator would have been crushed and most likely dead.

Кажись проблема из-за основания по которому ехал кран плиты надо было плотно поставить

ma quant'è bello

O preço dos acidentes nem sempre pagam futuras prevenções 😮

Why are people even standing anywhere near that crane while it is performing the lift??? Let alone UNDERNEATH the object?????

I am not an expert, but that is not very much counterweight that you can see in the video. Maybe a crane operator could comment on that. Other articles were saying the beam weighed 1,000's of tons. That does not look like a lot of counterweight.

As an amateur like me, I even would have used two cranes to lift up that huge block of concrete. It was pure gambling.

this is why I am terrified of cranes 😨

deveria ter um desengate rápido para deminuir o prejuízo não to vendo isso nesses tipos de acidente, e um erro de engenharia e segurança do trabalho.

Croboh ofreter y lifting/ barag yg di angkat berat sambel jln crene y trs agkat y tingi lgi huff

Does foreign workers know how to use a shortner to help reduce weight

All you armchair experts...if the spotters had been doing their job this could have been saved. IF at the moment it was noticed that the crane was tipping, at about the 45 second mark, the counter weight derek was lowered and weights roped up. This would have increased the effect of the counter weight. But nobody was really watching. Everything else about this lift was O.K. but not perfect.