Results 1 to 5 of 5

Thread: Counter-balance weight calcualtion

  1. #1
    Associate Engineer
    Join Date
    Dec 2013
    Posts
    2

    Counter-balance weight calcualtion

    As opposed to conducting a practical experiment, can anyone help me with calculating the counterbalance weight required to make a frame lift evenly?

    I have a frame, 18metres long x 2metres wide weighing 5 tonnes - when it is lifted using a 4 point lifting beam on designated lifting points, it lifts approxiamately 15 degrees out of balance. Is there a calculation for determining the counterweight that needs to be added at one end to rebalance the load?

    Regards, Ben

  2. #2
    Technical Fellow jboggs's Avatar
    Join Date
    Mar 2011
    Location
    Myrtle Beach, SC
    Posts
    839
    Can you calculate the position of the center of gravity? If you can all you have to do is add enough weight off center to move the CG directly under your hook. There might be some handy-dandy calculators on this website for that purpose. Kelly is very good at pointing them out.

  3. #3
    Administrator Kelly Bramble's Avatar
    Join Date
    Feb 2011
    Location
    Bold Springs, GA
    Posts
    2,338
    Quote Originally Posted by jboggs View Post
    Can you calculate the position of the center of gravity? If you can all you have to do is add enough weight off center to move the CG directly under your hook. There might be some handy-dandy calculators on this website for that purpose. Kelly is very good at pointing them out.
    Find the CG and then...

    http://www.engineersedge.com/calcula...e_levers_1.htm
    http://www.engineersedge.com/calcula...e_levers_2.htm
    http://www.engineersedge.com/calcula...e_levers_3.htm
    http://www.engineersedge.com/calcula...e_levers_4.htm

  4. #4
    Associate Engineer
    Join Date
    Dec 2013
    Posts
    2
    Thanks for your help guys.

  5. #5
    Senior Engineer
    Join Date
    Jan 2014
    Posts
    58
    Dropping a plumb bob from the hook will point at the CG. Not an experiment, but practical.

    Timelord

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •