9.3.1 Within the accommodation spaces, service
spaces and control stations the following requirements should be applied:
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.1 In every general area which is likely to be
regularly manned or in which personnel are accommodated, at least
two separate escape routes should be provided, situated as far apart
as practicable, to allow ready means of escape to the open decks and
embarkation stations. Exceptionally, the Administration may permit
only one means of escape, due regard being paid to the nature and
location of spaces and to the number of persons who might normally
be accommodated or employed there.
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.2 Stairways should normally be used for means
of vertical escape; however, a vertical ladder may be used for one
of the means of escape when the installation of a stairway is shown
to be impracticable.
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.3 Every escape route should be readily accessible
and unobstructed and all exit doors along the route should be readily
operable. Dead-end corridors exceeding 7 metres in length should not
be permitted.
9.3.2 Two means of escape should be provided from
every machinery space of Category A by one of the following:
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.1 two sets of steel ladders as widely separated
as possible leading to doors in the upper part of the space similarly
separated and from which access is provided to the open deck. In general,
one of these ladders should provide continuous fire shelter from the
lower part of the space to a safe position outside the space. However,
the Administration may not require the shelter if, due to special
arrangements or dimensions of machinery space, a safe escape route
from the lower part of this space is provided. This shelter should
be of steel, insulated, where necessary, to the satisfaction of the
Administration and be provided with a self-closing steel door at the
lower end; or
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.2 one steel ladder leading to a door in the upper
part of the space from which access is provided to the open deck and
additionally, in the lower part of the space and in a position well
separated from the ladder referred to, a steel door capable of being
operated from each side and which provides access to a safe escape
route from the lower part of the space to the open deck. Exceptionally,
the Administration may permit one means of escape, due regard being
paid to the nature and location of spaces and to the number of persons
who might normally be employed there.
9.3.3 From machinery spaces other than those of
Category A, escape routes should be provided to the satisfaction of
the Administration having regard to the nature and location of the
space and whether persons are normally employed in that space.
9.3.4 Lifts should not be considered as forming
one of the required means of escape.
9.3.5 Consideration should be given by the Administration
to the siting of superstructures and deckhouses such that in the event
of fire at the drill floor at least one escape route to the embarkation
position and survival craft is protected against radiation effects
of that fire as far as practicable.