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Thread: Crane collapses due to bad rigging - GIF

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    Altair's Avatar
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    baja (07-11-2020), dubbby (07-09-2020), NortonDommi (07-10-2020), Scotty12 (07-11-2020), Tonyg (07-10-2020)

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    Supporting Member IntheGroove's Avatar
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    IntheGroove's Tools
    Rigging fail chain reaction...

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    Why do we never see the end of these videos?

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    Cos the videographer believes in self preservation.

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    Supporting Member Toolmaker51's Avatar
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    Fail #1 , engineer of panel correctly sizing/ locating hardware to volume and dimension of concrete.
    Fail #2 How do these "riggers" and "crane operators" make such a lift without seeing ALL the weight go to bear on the upper shackles and cable? There was plenty of time to clear out, or stop and lower.

    PS. Seems clear shackle or cable seizing on upper right gave way first. Did that wave of energy flip lift cable off it's sheave, did the boom collapse, or hook then fail? At 15'' you see the spreader or boom tip hit the ground! Epic, catastrophic component failures.
    And parts of crew don't even clear out as far possible. InTheGroove's "chain reaction" a perfect assessment.
    Last edited by Toolmaker51; 07-10-2020 at 08:29 AM.
    Sincerely,
    Toolmaker51
    ...we'll learn more by wandering than searching...

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    Supporting Member NortonDommi's Avatar
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    This was in the news this morning: https://home.nzcity.co.nz/news/article.aspx?id=314830
    I keep well clear of the drop zone around lifts - best laid plans of mice and men and all that.

    There are preventable 'accidents', mother nature and acts of the Gods.

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    Supporting Member NeiljohnUK's Avatar
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    I write LOLER lifting plans for similarly off-centre/angled loads, that the anchor point tore out/sheared should have been allowed for as a potential failure as such side-loading is well known to cause such failures. Too many people too close is bad site management control, the pendulum effect was entirely predictable even if everything had stayed connected, I'd even bet the crane loading calc's didn't allow for the weight of the spreader beam or the 2 chain brothers.
    Last edited by NeiljohnUK; 07-10-2020 at 06:33 AM.

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    mlochala's Tools

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    It always amazes me how people stand (or are allowed to) in dangerous places when equipment is being lifted. I do engineering consultancy in a lot of large steel plant and often see their employees walking under plates that are being lifted - not sure what they think their hard hat could contain, apart from a crumpled body. It is the old adage that familiarity breeds contempt.
    I have also witnessed some nasty accidents at sites and a few deaths - all were unnecessary.

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    Supporting Member VinnieL's Avatar
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    When I was a cop, I never stood around a towtruck winching a car or lifting a vehicle.
    The steel cables on a tow truck under that kind of tension if they break, can turn into a deadly whip that could take someone's head right off.
    We've all seen nylon tow ropes and steel chains break and go right through the back window of a truck cab.

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