In the following paragraphs it is assumed that the total
heeling moment for a compartment is obtained by adding the results
of separate consideration of the following portions:
2.8 Before and abaft hatchways:
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.1 If a compartment has two or more main hatchways
through which loading may take place, the depth of the underdeck void
for the portion or portions between such hatchways shall be determined
using the fore and aft distance to the midpoint between the hatchways.
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.2 After the assumed shift of grain the final
void pattern shall be as shown in figure
B 2-1.
Figure B 2-1
(1) If the maximum void area which can be formed against
the girder at B is less than the initial area of the void under AB, i.e. AB × Vd,
the excess area shall be assumed to transfer to the final void on the high side.
(2) If, for example, the longitudinal division at C is one
which has been provided in accordance with A 10.9, it shall
extend to at least 0.6m below D or E, whichever gives the greater depth.
2.9
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.1 In and abreast of hatchways without longitudinal
division:
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After the assumed shift of grain the final void pattern
shall be as shown in figure B 2-2 or figure B 2-3:
-
.2 In and abreast of hatchways with longitudinal
division:
Figure B 2-2
(1) AB - Any area in excess of that which can be formed
against the girder at B shall transfer to the final void area in the hatchway.
(2) CD - Any area in excess of that which can be formed
against the girder at E shall transfer to the final void area on the high side.
Figure B 2-3
(1) The excess void area from AB shall transfer to the low
side half of the hatchway in which two separate final void areas will be formed, viz.
one against the centreline division and the other against the hatch side coaming and
girder on the high side.
(2) If a bagged saucer or bulk bundle is formed in a
hatchway it shall be assumed for the purpose of calculating the transverse heeling
moment that such a device is at least equivalent to the centreline division.