0027-nd rev 11.2 8-jul-16 guidelines for marine lifting and lowering operations
GUIDELINES FOR MARINE LIFTING & LOWERING OPERATIONS 0027/ND Rev 11 Page 79 of 84 A.3. RIGGING ARRANGEMENTS A.3.1
Documentation shall be presented including:
a.
The proposed rigging geometry showing:
o
Dimensions of the structure,
o
Centre of gravity position,
o
Lift points,
o
Crane hook,
o
Sling lengths and angles, including shackle dimensions and "lost" length around hook
and trunnions.
b.
A computation of the sling and shackle loads and required breaking loads, taking into account
the factors set out in Section 5.
c.
A list of actual slings and shackles proposed, tabulating:
o
Position on structure
o
Sling/shackle identification number
o
Sling length and diameter
o
Rigging utilisation factor summaries
o
MBL for slings and grommets,
o
WLL and MBL (or safety factor) for shackles
o
Construction
o
Direction of lay
o
Wire grade and wire type (bright or galvanised).
o
Copies of inspection/test Certificates for all rigging components. These certificates shall
be issued or endorsed by a body approved by an IACS member for the certification of
that type of equipment.
A.3.2
Where spreader bars or spreader frames are not load tested (as in Section 18.11) an as-built
fabrication dossier shall be provided listing the following minimum information:
a.
Material certificates (3rd party endorsed),
b.
Welding consumables certificates,
c.
Weld procedures,
d.
NDT procedures,
e.
Welders and NDT operatives qualifications,
f.
Inspection and Test Plan (ITP) listing Hold Monitor and Witness points,
g.
3rd party fabrication release note,
h.
Technical queries /concession requests,
i.
As-built drawings,
j.
Design report.
A.3.3
When subsea lifting or lowering is involved, additional documentation should be provided to show that
the topics covered in Section 19.3 to 19.12, if applicable, are covered.
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