1 Gauging is necessary to determine the general
condition of the structure and to define the extent of possible repairs
and/or reinforcements of the vertically corrugated transverse watertight
bulkhead for verification of the compliance with the Bulk carrier
bulkhead and double bottom strength standards, defined in regulation
XII/1.5 of the Convention.
2 Taking into account the buckling model specified
in the Bulk carrier bulkhead and double bottom strength standards,
defined in regulation XII/1.5 of the Convention, in the evaluation
of strength of the bulkhead, it is essential to determine the thickness
diminution at the critical levels shown in figures 1 and 2 of this annex.
3 The gauging should be carried out at the levels
as described below. To adequately assess the scantlings of each individual
vertical corrugation, each corrugation flange, web, shedder plate
and gusset plate within each of the levels given below should be gauged.
Level (a) Ships without lower stool (see figure 1):
-
Locations:
- The mid-breadth of the corrugation flanges at approximately 200
mm above the line of shedder plates;
- The middle of gusset plates between corrugation flanges, where
fitted;
- The middle of the shedder plates;
- The mid-breadth of the corrugation webs at approximately 200 mm
above the line of shedder plates.
Level (b) Ships with lower stool (see figure 2):
-
Locations:
- The mid-breadth of the corrugation flanges at approximately 200
mm above the line of shedder plates;
- The middle of gusset plates between corrugation flanges, where
fitted;
- The middle of the shedder plates;
- The mid-breadth of the corrugation webs at approximately 200 mm
above the line of shedder plates.
Level (c) Ships with or without lower stool (see figures 1 and 2):
-
Locations:
- The mid-breadth of the corrugation flanges and webs at about the
mid-height of the corrugation.
4 Where the thickness changes within the horizontal
levels, the thinner plate should be gauged.
5 Steel renewal and/or reinforcement should comply
with the Bulk carrier bulkhead and double bottom strength standards,
defined in regulation XII/1.5 of the Convention.
Figure 1
Figure 2