Big crane safety fail today, a 60 ton crane snapped its boom - Page 3
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  1. #41
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    If I could only sing the Mon ty Pyt hons spam song.............

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    That incidents was terrific. Crane should always be handled carefully. Now many of you may say that the operator may not know about the wind speed or the weight he was lifting but there are crane safety systems that would help the operator to do his job. He may not see the blind spots but he can see it from crane camera system.

  4. #43
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    Quote Originally Posted by EdwardGrey View Post
    That incidents was terrific. Crane should always be handled carefully. Now many of you may say that the operator may not know about the wind speed or the weight he was lifting but there are crane safety systems that would help the operator to do his job. He may not see the blind spots but he can see it from crane camera system.
    SSDD...cripes.

  5. #44
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    Quote Originally Posted by Bill D View Post
    Hey I am not illiterate, my parents were married before I was born.
    Bill D.
    To each other?

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    Quote Originally Posted by digger doug View Post
    SSDD...cripes.

    No - it's the same day as his other post.


    -------------

    Think Snow Eh!
    Ox

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  9. #46
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    Quote Originally Posted by GregSY View Post
    That's nothing compared to the horror the functionally illiterate using a verb as a noun.

    I agree and I was deeply offended as well.

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    Quote Originally Posted by Newman109 View Post
    I agree and I was deeply offended as well.
    verbs? nouns? adjectives? …….I just get my mucking fords wuddled.

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    And I never kissed my wife until we were married.

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    Quote Originally Posted by neilho View Post
    Assuming the pic was taken in the as-failed position.....

    Seems to me the crane would have had a lot more capacity had the lower boom sections been extended and the uppers retracted. (Collapsed might be the wrong word ) Perhaps this is what loggerhogger and ichudov were saying. Can't the operator control that manually?

    Neil
    I know this is an old thread, but thought I would expand on this.

    What boom sections that are ran out has some to do with crane capacity, but it doesn't always work the way you think. On most modern cranes, the operator can choose what sections to run out, and different charts call for different boom configurations. I have seen instances where the crane computer (LMI) would give you a better chart with the smaller sections ran out. This is due to the weight of the boom sections themselves affecting how much the crane can pick.

    You have two different factors to deal with on a crane, the tipping capacity and the structural capacity. The difference in tipping and structural capacity will be separated by a bold line in the crane capacity charts. The crane in question obviously exceeded the structural capacity. Back in the old days before LMIs, I always preferred lifting within the tipping section of the chart rather than the structural section. You can pretty much feel in your butt when you've exceeded the tipping point of the crane, but structural failures give little noticeable warning before failure.

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