Crane Dynamic Factor - DNV-ST-0378
Hoisting dynamic factor ψ for offshore and shipboard cranes per DNV-ST-0378 / API 2C - the multiplier on static load for design.
Dynamic factor ψ
1.86 -
Formula, assumptions, and limits
Screening formulation; full DNV-ST-0378 uses lift weight, hook load, vessel motion spectral bandwidth. Offshore PS lifts limit ψ·SWL to 1.33× chart capacity.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Base dynamic factor | - | DNV-ST-0378 | |
| Hoisting speed | m/s | maker data | |
| Sea state at lift | m | metocean |