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 14 of 84 Term or Acronym Definition Lift point
The connection between the rigging and the structure to be lifted. May
include padear, padeye or trunnion
Lifting Beam
A lifting beam is a structure designed to be connected to a lifting appliance
at a single point, and structure being lifted is connected to the bottom of the
beam at two or more lift points. The beam shall resist the bending
moments. It is not designed to carry compression loads.
Load Factor
A factor used on a design load in a limit state analysis and is also used in
the design of slings and grommets used for lifting operations.
Load-in
The transfer of a major assembly or a module from a barge, e.g. by
horizontal movement or by lifting
Load-out
The transfer of a major assembly or a module onto a barge, e.g. by
horizontal movement or by lifting
LS1 /
Limit State 1
A design condition where the loading is gravity dominated; also used when
the exclusions of Section 9.2.2 of 0001/ND, Ref. [1] apply.
LS2 /
Limit State 2
A design condition where the loading is dominated by environmental /
storm loads, e.g. at the 10- or 50-year return period level or, for weather-
restricted operations, where an Alpha Factor according to Section 7.3.8 of
0001/ND, Ref [1], is to be applied.
Matched pair of
slings
A matched pair of slings is fabricated or designed so that the difference in
length does not exceed 0.5d for cable laid slings or grommets and 1.0d for
single laid slings or grommets, where d is the nominal diameter of the sling
or grommet. See Section 2.2 of IMCA, Ref. [7] for cable laid details.
Material Factor,
m
A factor used on a material’s yield stress in a limit state analysis and also a
factor used in the design of slings and grommets used for lifting operations.
MBL /
Minimum Breaking
Load
The minimum allowable value of breaking load for a particular sling,
grommet, wire, chain, or shackle etc.
Mechanical
Termination
A sling eye termination formed by use of a ferrule that is mechanically
swaged onto the rope. See ISO, Ref. [9] and [10]
MPI / Magnetic