When taking account of superstructures which have sloping
end bulkheads, in the calculations of freeboards, such superstructures
should be dealt with in the following manner:
1 When the height of the superstructure, clear
of the slope, is equal to or smaller than the standard height, the
length (S) should be obtained as shown in figure 4.
Figure 4 Height of superstructure equal to or smaller than the standard height
2 When the height is greater than the standard,
the length (S) should be obtained as shown in figure 5.
Figure 5 Height of superstructure greater than the standard height
3 The foregoing should apply only when the slope,
related to the base line, is 15°, the configuration should be
treated as sheer.
When the height of the superstructure, clear of the slope
is less than the standard height, its effective length (E)
should be its length (S), as obtained from paragraph
1 above, reduced in the ratio of its actual height to the standard
When a poop or forecastle has sloping end bulkheads, and
sheer credit may be allowed on account of excess height, the formula
given in regulation 38(12) should be used,
the values for y and L' being as shown in figure 6.
Figure 6 Sheer credit (s) for excess height