Utilizing a Cranemaster shock absorber enables rig cranes to maintain high lifting capacity despite increasing wave heights. Up to 95% of the dynamic forces will be absorbed by the shock absorber, protecting both crane and load and giving a smooth operator experience. We can recalculate your load chart taking the dynamic load reduction into account. The new and improved load chart can further be verified by 3rd party.
- Reduced lifting capacity at increasing wave heights.
- Potential damage to rig crane and load due to dynamic forces at high sea states.
- Increased weather window for your lifting operations.
- Lifting capacity maintained despite increasing wave heights.
- Increased rig utilization through improved operability.
- Protection of crane, rigging and load at lift-off.
- Easy mounting and handling.
- Smooth and efficient crane operator experience.
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Significant improvements in lift-off situations with Cranemaster
The dynamic amplification factor (DAF) resulting from wave induced movements may be very high even for small wave heights. A Cranemaster® shock absorber mounted between the hook and the load will reduce the dynamic load at lift-off, and thus the DAF. The DAF is typically reduced to 1.3 or below for sea states up to Hs = 2.0-2.5 m.
We can recalculate your load chart taking the dynamic load reduction into account, and will thus increase the acceptable load as function of sea states. The new and improved load chart can further be verified by 3rd party. In order to do the recalculation, we need to have specific information about your crane.
Increased crane capability at high sea states
Utilizing Cranemaster, an offshore crane may typically be able to maintain close to full onboard capacity up to a wave height (Hs) of around 2.0 – 2.5 meters.
Cranemaster has controlled dampening and spring functionality, providing a fine tuned spring-damper system. This system will efficiently absorb energy created due to the relative motion between crane and load in a lifting operation. Since the energy is absorbed by the Cranemaster unit, both crane and load will be protected. This makes it possible to conduct the operation in challenging sea states while limiting dynamic load acting on crane and load.