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I was wrong! I'm drinking beer, so sue me...
The factor of "g" does need to be removed, but it's also removed in the carry capacity of the crane, so it washes out.
The crane must be able to hold the weight of the three men to be safe, which it does (well, not quite, it's 25 pounds overweight).
However! There is another factor, and that is the "jerk". The change in acceleration.
When the men jump off the ladder, the jerk felt by the crane increases substantially (a factor of three, if they all weigh about the same). The crane might not be rated for that jerk, or dynamic load.
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Mike Bradshaw
1980 911SC sunroof coupe, silver/black
Putting the sick back into sycophant!
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