Answer to Quiz No. 13



The main points to remember concerning the center of gravity (CG) are:

1. The CG always hangs under the hook when the load is suspended.

2. Equal angles between the slings and the horizontal means equal tensions.

3. Draw the load to scale and size the slings so that the hook is forced over the CG at initial pick. This will ensure that the load will pick level. Compare rigging hook up no. 2 to no. 4.

4. When figuring the vertical reaction for use in determining sling tensions, use ANY HORIZONTAL REFERENCE LINE. See rigging hook up no. 1

    


    


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