FOR MARINE LIFTING & LOWERING OPERATIONS 0027/ND Rev 11 Page 41 of 84 11.6 SPREADER BARS, FRAMES & OTHER STRUCTURAL ITEMS OF LIFTING EQUIPMENT 11.6.1
Spreader bars, frames and other structural items of lifting equipment, if used, should be similarly
treated, with load cases as above. A consequence factor shall be applied to spreader bars and
frames, in accordance with Section 11.4.
11.6.2
Where a spreader bar, frame or other structural item of lifting equipment is certified, the certified
capacity may be increased by any DAF that has been taken into account in the certified capacity
before being compared against the dynamic loading enhanced by the applicable consequence factor
from Section 11.4.
11.7 ALLOWABLE STRESSES 11.7.1
The primary structure shall be of high quality structural steelwork with full material certification and
NDT inspection certificates showing appropriate levels of inspection. It shall be assessed using the
methodology of a recognised and applicable offshore code including the associated load and
resistance factors for LRFD codes or safety factors for ASD/WSD codes. Further details appear in
Section 9.1 of 0001/ND, Ref. [1].
11.7.2
Except for sacrificial bumpers and guides (see Section 17.5.4), the loading shall be treated as an LS1
limit state.
11.8 INDEPENDENT ANALYSIS 11.8.1
Alternatively, GL Noble Denton will, if instructed, perform an independent analysis of the structure to
be lifted, including the lift points, on receipt of the necessary information.
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