3.8 Longitudinal strength criteria
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Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC/Circular.920 – Model Loading and Stability Manual – (15 June 1999) - Annex – Model Loading and Stability Manual - Section 3 – Technical information (Category 1 and 2)1 - 3.8 Longitudinal strength criteria

3.8 Longitudinal strength criteria

  3.8.1 This subsection should contain, in a suitable table for selected longitudinal positions, i.e. frames or bulkheads the:

  • .1 frame number and longitudinal co-ordinate;

  • .2 maximum permissible shearforces, positive and negative, for operation in port and at sea; and

  • .3 maximum permissible bending moments, positive and negative, for operation in port and at sea.

    Shear force limit (kN) Bending moment limit (kNm)
Frame x – co-ordinate at sea in port at sea in port
. . . . . . . .
. . . . . . . .
64 44,2 m 21050 –20750 ± 25350 292850 – 240400 ± 465350
. . . . . . . .
. . . . . . . .

 If those limiting values depend on specific parameters, e.g., homogeneous or alternating cargo distribution, draught, or other conditions of service, additional tables should be provided as appropriate.

  3.8.2 A separate table for pre-estimating the ship's deflection from bending moments in the full sections of the ship may be provided in this subsection. This information should reflect any constant deflection as may be identified during the initial inclining experiment and deadweight survey, if required. The maximum allowable deflection (hog or sag) in port and at sea should be specified. The information addressed to in this paragraph may be considered as category 1B information.

  3.8.3 Maximum allowable torsional moments should be provided in a table as described under 3.8.1 for ships which are sensible to torsion due to their construction and cargo stowage practice.


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