10.2 CRANES 10.2.1
Cranes should be currently certified by an IACS member and the proposed load and conditions within
the boundaries of this certification. Additional Norwegian Maritime Directorate (NMD) requirements
may apply for Norway.
10.2.2
If the crane is not certified by an IACS member, then an inspection and inspection report by a
competent person is required and this report demonstrating conformity shall be submitted. For
applicable IACS members, see IACS web site given below:
http://www.iacs.org.uk/explained/members.aspx
10.2.3
A risk assessment shall be carried out in the presence of GL Noble Denton for cranes and lifting
devices that are not a normal part of the vessel's equipment.
10.3 HOOK LOAD 10.3.1
The hook load shall be shown not to exceed the certified allowable crane capacity as taken from the
load-radius curves. Crane curves are generally expressed as safe working loads or static capacities,
in which case they should be compared against the dynamic hook load. Information should be
obtained to document this.
10.3.2
The allowable load-radius curves as presented can sometimes include a dynamic effect allowance. If
a suitable statement is received to this effect, then the dynamic hook load derived in Section 6.2 may
be compared against the load-radius curves.
10.3.3
Some crane curves specify different allowable load curves for different seastates. These may similarly
be taken to include dynamic effects. A seastate representing the probable limits for the operation
should be chosen and the static hook load used for comparison.
10.3.4
If the DAF included in the crane curves differs from the operation-specific value derived from Section
5.5, then the allowable static hook load should be adjusted accordingly but shall not exceed the
certified crane (SWL or WLL) load-radius curve.
