3.2.1 No accommodation space, service space or
control station shall be located within the cargo area. The bulkhead
of accommodation spaces, service spaces or control stations that face
the cargo area shall be so located as to avoid the entry of gas from
the hold space to such spaces through a single failure of a deck or
bulkhead on a ship having a containment system requiring a secondary
barrier.
3.2.2 To guard against the danger of hazardous
vapours, due consideration shall be given to the location of air intakes/outlets
and openings into accommodation, service and machinery spaces and
control stations in relation to cargo piping, cargo vent systems and
machinery space exhausts from gas burning arrangements.
3.2.3 Access through doors, gastight or otherwise,
shall not be permitted from a non-hazardous area to a hazardous area
except for access to service spaces forward of the cargo area through
airlocks, as permitted by 3.6.1, when accommodation spaces are aft.
3.2.4.1 Entrances, air inlets and openings to
accommodation spaces, service spaces, machinery spaces and control
stations shall not face the cargo area. They shall be located on the
end bulkhead not facing the cargo area or on the outboard side of
the superstructure or deckhouse or on both at a distance of at least
4% of the length (L) of the ship but not less than 3
m from the end of the superstructure or deckhouse facing the cargo
area. This distance, however, need not exceed 5 m.
3.2.4.2 Windows and sidescuttles facing the cargo
area and on the sides of the superstructures or deckhouses within
the distance mentioned above shall be of the fixed (non-opening) type.
Wheelhouse windows may be non-fixed and wheelhouse doors may be located
within the above limits so long as they are designed in a manner that
a rapid and efficient gas and vapour tightening of the wheelhouse
can be ensured.
3.2.4.3 For ships dedicated to the carriage of
cargoes that have neither flammable nor toxic hazards, the Administration
may approve relaxations from the above requirements.
3.2.4.4 Accesses to forecastle spaces containing
sources of ignition may be permitted through a single door facing
the cargo area, provided the doors are located outside hazardous areas
as defined in chapter 10.
3.2.5 Windows and sidescuttles facing the cargo
area and on the sides of the superstructures and deckhouses within
the limits specified in 3.2.4, except wheelhouse windows, shall be
constructed to "A-60" class. Wheelhouse windows shall be constructed
to not less than "A-0" class (for external fire load). Sidescuttles
in the shell below the uppermost continuous deck and in the first
tier of the superstructure or deckhouse shall be of fixed (non-opening)
type.
3.2.6 All air intakes, outlets and other openings
into the accommodation spaces, service spaces and control stations
shall be fitted with closing devices. When carrying toxic products,
they shall be capable of being operated from inside the space. The
requirement for fitting air intakes and openings with closing devices
operated from inside the space for toxic products need not apply to
spaces not normally manned, such as deck stores, forecastle stores,
workshops. In addition, the requirement does not apply to cargo control
rooms located within the cargo area.
3.2.7 Control rooms and machinery spaces of turret
systems may be located in the cargo area forward or aft of cargo tanks
in ships with such installations. Access to such spaces containing
sources of ignition may be permitted through doors facing the cargo
area, provided the doors are located outside hazardous areas or access
is through airlocks.