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Thread: Crane calculations help

  1. #1
    Associate Engineer
    Join Date
    Dec 2021

    Crane calculations help

    Hi, I was wondering if someone can help me with these crane calulation problems ? As I have tried and don't nowhere to begin to find the solutions.

    The diameter of the winch drum is 0.8m It is turning at 50 rev/min.

    The hook is reeved with 4 falls

    1. What is the lowering speed of the hook in m/min?

    2.What would be the hook speed in m/min if it was reeved with only twofalls?

    3. If it was possible to lift 9 tonnes on 4 falls how much could you lift on 2falls given no other limiting factors?

    i wasnt sure is this formula is needed ? v=wr
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