0027/nd guidelines for Marine Lifting and Lowering Operations

9.3 
SPREADER BARS AND SPREADER FRAMES 
9.3.1 
The design of spreader bars and spreader frames shall be carried out according to Section 11. The 
spreader bars and spreader frames shall be considered as a lift point and subject to the same 
requirements (e.g. consequence factor). 
9.3.2 
Eccentricities considering maximum possible deviations in sling angles should be considered in 
spreader bar and frame verifications. 
9.3.3 
The design loads on the spreader bar or spreader frame shall account for the maximum dynamic 
rigging loads determined in Section 6. 
9.3.4 
Where a spreader bar or spreader frame is used in a subsea application, the tubulars should be open 
ended or have flooding/vent holes to avoid hydrostatic loading. Where this is not provided, then the 
effect of hydrostatic loading shall be considered on the spreader bar with the hydrostatic loads also 
having the consequence factor applicable for lift points applied to the loading. The design hydrostatic 
depth shall include a margin of the greater of 30 m or 10% of the water depth.
9.3.5 
For spreader bars or frames which are not free flooding, the maximum depth rating shall be clearly 
marked on the spreader bar or spreader frame. 
9.4 
OTHER LIFTING EQUIPMENT 
9.4.1 
Other lifting equipment is defined as all elements transferring loads between the hook and the object 
lift points; e.g. chains, rings, hooks, links, swivels, sheave blocks, lifting beams and heave 
compensators.
9.4.2 
Other lifting equipment shall be suitable for the maximum dynamic rigging loads determined in Section 
5. 
9.5 
FIBRE ROPE REPLOYMENT SYSTEMS 
9.5.1 
Fibre rope deployment systems may be used for lowering structures to the seabed to reduce weight. 
11 

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