10.2.1 Where
longitudinal underdeck girders are fitted at deck level to support
the hatch covers the requirements of this sub-Section are to be complied
with.
10.2.2 The
girders may take the form of open or closed box sections and these
should align with webs on the transverse bulkheads to form a continuous
ring structure.
10.2.3 The
girders are, in general, to be continuous throughout the container
hold area, including the engine room where this is situated between
container holds.
10.2.4 Special
attention is to be given to the intersection of the girders with transverse
box girders and the integration into the fore end, aft end and machinery
space structures.
10.2.5 Where
girders are integrated into the cross-deck strips, inserts plates
with integral gussets are to be incorporated. The inserts are to have
a thickness not less than that of the girder top and bottom plates,
as appropriate. The radius of main hatchway openings in way of ends
of hatch girders at upper deck level is, in general, to be not less
than 20 per cent of the width of the cross-deck strip indicated inPt 4, Ch 8, 4.4 Cross decks 4.4.5 with a minimum of 250 mm.