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    Richard P Wilson
    Senior Member

  • Richard P Wilson
    replied
    I don't recall that a luffing jib was the same as a fly jib, but as I said, its been a while----

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  • boslab
    Senior Member

  • boslab
    replied
    Also called a luffing jib, at least demag do, mind they weren’t small things! The SL 1100 was 3/4 of a football pitch at a guess
    mark

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  • alanganes
    Senior Member

  • alanganes
    replied
    Thanks that all makes sense. This didn’t look like it would pivot out to attach it looked like it had to be removed and it wasn’t obvious to me how it would attach to the end of the main boom.

    I couldn’t get a good look at it and was trying hard to stay out of the guy’s way while they worked.

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  • Richard P Wilson
    Senior Member

  • Richard P Wilson
    replied
    Fly jib was something we had on the old lattice boom crawler cranes. It was fairly light weight and fitted to the end of the normal boom, but at an angle so it increased the reach when lifting light loads. It wasn't in a straight line with the main boom like the one in the video is. A long time since I last used one of them.

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  • Peter.
    Senior Member

  • Peter.
    replied
    Called a fly jib round these parts. It adds reach at the expense of de-rating the lifting capacity usually quite significantly.

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  • Stu
    Senior Member

  • Stu
    replied
    It's called a jib boom, with the main boom lowered horizontal the jib is swung on pivots and attached to the main boom. The cable is extended and run through the jib sheaves. The process takes less than an hour to do.

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  • MattiJ
    Senior Member

  • MattiJ
    replied
    I think the extension is called "jib"
    And here is one way to do it on a larger crane:
    https://www.youtube.com/watch?v=Cf-mjWQXAjQ

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  • BCRider
    Senior Member

  • BCRider
    replied
    I'd want to see a picture of where the two upper ends meet. I know that I've seen a two section boom where there was a side folding hinge. And there was no cylinder on the second part. Instead it looked like it would be unfolded and locked while the whole rig was lowered to horizontal. Then raised from there. This might be something similar. But the part where the hinges and latch, if any, would be located is up in the tree branches.

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  • alanganes
    Senior Member

  • alanganes
    started a topic Crane boom question

    Crane boom question

    I had a tree service out to my in-laws place to have some badly leaning trees removed the other day.
    They had a mobile crane there to assist. The crane boom was the extending type that was used to do all the work. To one side of the boom was attached the short lattice type boom section that was not used. I’ve noticed those before. Is that simply added to the end of the telescoping boom to get more reach?

    how is that done? Do you need another crane to attach it? Click image for larger version

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