3.2.1 No accommodation space,
service space or control station should be located within the cargo
area. The bulkhead of accommodation spaces, service spaces or control
stations which face the cargo area should 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 In order to guard against
the danger of hazardous vapours, due consideration should be given
to the location of air intakes 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, should not be permitted from a gas-safe space
to a gas-dangerous space, except for access to service spaces forward
of the cargo area through air-locks as permitted by 3.6.1 when accommodation spaces are aft.
3.2.4 Entrances, air inlets
and openings to accommodation spaces, service spaces, machinery spaces
and control stations should not face the cargo area. They should be
located on the end bulkhead not facing the cargo area or on the outboard
side of the superstructure or deck house 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 deck house facing
the cargo area. This distance, however, need not exceed 5 m. Windows
and sidescuttles facing the cargo area and on the sides of the superstructure
of deck house within the distance mentioned above should 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 so designed that a rapid and efficient gas and vapour tightening
of the wheelhouse can be ensured. For ships dedicated to the carriage
of cargoes which have neither flammable nor toxic hazards, the Administration
may approve relaxations from the above requirements.
3.2.5 Sidescuttles in the shell
below the uppermost continuous deck and in the first tier of the superstructure
or deck house should be of the fixed (non-opening) type.
3.2.6 All air intakes and openings
into the accommodation spaces, service spaces and control stations
should be fitted with closing devices. For toxic gases they should
be operated from inside the space.