Difference between Lifting and Operating COG

[Alexis13]

Hello,
could you please explain to me the difference between Lifting and Operating center of gravity?
Thanks

 

[msquared48]

If you are speaking of a crane, then you are talking about the CG in two different situations:

1. With no pick, but the boom at any angle and how the CG Moves.

2. Same as 1, but with a pick, the maximum of which will vary with the boom angle and use of outriggers.

Mike McCann
MMC Engineering

 

[fancypants]

Can you specify what you are talking about?

If you are talking about the CG of the object to be lifted and say it was a object of some type, (e.g. fractionator, oxidizer, reactor, storage tank, generator etc...) then the lifting CG would be one where the internals, ladder, platforms, liquids etc... are not on or in the unit. The operating CG is when the unit is in operation and all the additiional weights are in place.