DAF applied to the lift by offshore crane

[RahimJ]

Good day All,

We had a long debate in office on requirement for DAF to be applied. Actually concern is that crane technical specification says Crane Dynamic Factor 1.6 and the load chart is de-rated for various sea state conditions. So can someone help to understand is the additional DAF to the load still applicable? or just a static load shall be considered in that case?

 

[Shu Jiang PEng SE]

Normally, DAF does not need to be 1.6 for the load is pretty heavy and lifting speed not fast. The following table is from offshore standard DNV-OS-H205 for your reference.