9.1.3 In addition to complying with the specific
provisions for fire integrity of bulkheads and decks in this section
and in 9.2, the minimum fire integrity of bulkheads and decks should
be as prescribed in tables 9-1 and 9-2. Exterior boundaries of superstructures
and deckhouses enclosing accommodation, including any overhanging
decks which support such accommodation, should be constructed to "A-60"
standard for the whole of the portion which faces and is within 30
m of the centre of the rotary table. For units that have a movable
substructure the 30 m should be measured with the substructure at
its closest drilling position to the accommodation. The Administration
may accept equivalent arrangements.
9.1.4 The following requirements should govern
application of the tables:
-
.1 Tables 9-1 and 9-2 should apply respectively to the
bulkheads and decks separating adjacent spaces.
-
.2 For determining the appropriate fire integrity
standards to be applied to divisions between adjacent spaces, such
spaces are classified according to their fire risk, as shown in categories
(1) to (11) below. The title of each category is intended to be typical
rather than restrictive. The number in parenthesis preceding each
category refers to the applicable column or row in the tables:
-
(1) "Control stations" are spaces as defined in 1.3.31.
-
(2) "Corridors" means corridors and lobbies.
-
(3) "Accommodation spaces" are spaces as defined
in 1.3.45, excluding corridors, lavatories
and pantries containing no cooking appliances.
-
(4) "Stairways" are interior stairways, lifts
and escalators (other than those wholly contained within the machinery
spaces) and enclosures thereto. In this connection a stairway which
is enclosed only at one level should be regarded as part of the space
from which it is not separated by a fire door.
-
(5) "Service spaces (low risk)" are lockers, store-rooms
and working spaces in which flammable materials are not stored, drying
rooms and laundries.
-
(6) "Machinery spaces of category A" are spaces
as defined in 1.3.29.
-
(7) "Other machinery spaces" are spaces as defined
in 1.3.30 other than machinery spaces
of category A.
-
(8) "Hazardous areas" are areas as defined in 1.3.32.
-
(9) "Service spaces (high risk)" are lockers,
store-rooms and working spaces in which flammable materials are stored,
galleys, pantries containing cooking appliances, paint rooms and workshops
other than those forming part of the machinery space.
-
(10) "Open decks" are open deck spaces, excluding
hazardous areas.
-
(11) "Sanitary and similar spaces" are communal
sanitary facilities such as showers, baths, lavatories, etc., and
isolated pantries containing no cooking appliances. Sanitary facilities
which serve a space and with access only from that space shall be
considered a portion of the space in which they are located.
9.1.5 Continuous "B" class ceilings or linings
in association with the relevant decks or bulkheads may be accepted
as contributing wholly or in part to the required insulation and integrity
of a division.
9.1.6 In approving structural fire protection
details, the Administration should have regard to the risk of heat
transmission at intersections and terminal points of required thermal
barriers.
Table 9-1 Fire integrity of
bulkheads seperating adjacent spaces
| Spaces
|
(1 )
|
(2)
|
(3)
|
(4)
|
(5)
|
(6)
|
(7)
|
(8)
|
(9)
|
(10)
|
(11)
|
| Control stations (1)
|
A-0(d)
|
A-0
|
A-60
|
A-0
|
A-15
|
A-60
|
A-15
|
A-60
|
A-60
|
*
|
A-O
|
| Corridors (2)
|
|
C
|
B-0
|
B-0
A-0(b)
|
B-0
|
A-60
|
A-0
|
A-0
|
A-0
|
*
|
B0
|
| Accommodation spaces (3)
|
|
|
C
|
B-0
A-0(b)
|
B-0
|
A-60
|
A-0
|
A-0
|
A-0
|
*
|
C
|
| Stairways (4)
|
|
|
|
B-0
A-0(b)
|
B-0
A-0(b)
|
A-60
|
A-0
|
A-0
|
A-0
|
*
*
|
B-0
A-0(b)
|
| Service spaces (5) (low risk)
|
|
|
|
|
C
|
A-60
|
A-0
|
A-0
|
A-0
|
*
|
B-0
|
| Machinery spaces (6) of category
A
|
|
|
|
|
|
*(a)
|
A-0(a)
|
A-60
|
A-60
|
*
|
A-0
|
| Other machinery (7) spaces
|
|
|
|
|
|
|
A-0(a)
(c)
|
A-0
|
A-0
|
*
|
A-0
|
| Hazardous areas (8)
|
|
|
|
|
|
|
|
–
|
A-0
|
–
|
A-0
|
| Service spaces (9) (high
risk)
|
|
|
|
|
|
|
|
|
A-0(c)
|
*
|
A-0
|
| Open decks (10)
|
|
|
|
|
|
|
|
|
|
–
|
*
|
| Sanitary and (11) similar
spaces
|
|
|
|
|
|
|
|
|
|
|
C
|
|
See notes under table 9–2
|
Table 9-2 Fire Integrity of decks
separating adjacent spaces
Space
↓Below
|
Space
 Above
|
(1)
|
(2)
|
(3)
|
(4)
|
(5)
|
(6)
|
(7)
|
(8)
|
(9)
|
(10)
|
(11)
|
| Control stations
|
(1)
|
A-0
|
A-0
|
A-0
|
A-0
|
A-0
|
A-60
|
A-0
|
A-0
|
A-0
|
*
|
A-0
|
| Corridors
|
(2)
|
A-0
|
*
|
*
|
A-0
|
*
|
A-60
|
A-0
|
A-0
|
A-0
|
*
|
*
|
| Accommodation
spaces
|
(3)
|
A-60
|
A-0
|
*
|
A-0
|
*
|
A-60
|
A-0
|
A-0
|
A-0
|
*
|
*
|
| Stairways
|
(4)
|
A-0
|
A-0
|
A-0
|
*
|
A-0
|
A-60
|
A-0
|
A-0
|
A-0
|
*
|
A-0
|
| Service spaces (low
risk)
|
(5)
|
A-15
|
A-0
|
A-0
|
A-0
|
*
|
A-60
|
A-0
|
A-0
|
A-0
|
*
|
A-0
|
| Machinery spaces of
category A
|
(6)
|
A-60
|
A-60
|
A-60
|
A-60
|
A-60
|
*(a)
|
A-60
|
A-60
|
A-60
|
*
|
A-0
|
| Other machinery
spaces
|
(7)
|
A-15
|
A-0
|
A-0
|
A-0
|
A-0
|
A-0(a)
|
*(a)
|
A-0
|
A-0
|
*
|
A-0
|
| Hazardous areas
|
(8)
|
A-60
|
A-0
|
A-0
|
A-0
|
A-0
|
A-60
|
A-0
|
–
|
A-0
|
–
|
A-0
|
| Service spaces (high
risk)
|
(9)
|
A-60
|
A-0
|
A-0
|
A-0
|
A-0
|
A-0
|
A-0
|
A-0
|
A-0(c)
|
*
|
A-0
|
| Open decks
|
(10)
|
*
|
*
|
*
|
*
|
*
|
*
|
*
|
–
|
*
|
–
|
*
|
| Sanitary and similar
spaces
|
(11)
|
A-0
|
A-0
|
*
|
A-0
|
*
|
A-0
|
A-0
|
A-0
|
A-0
|
*
|
*
|
| Notes:
|
To be applied to tables 9-1 and 9-2, as appropriate.
|
| (a)
|
Where the space contains an emergency power source or components
of an emergency power source adjoining a space containing a ship's service
generator or the components of a ship's service generator, the boundary
bulkhead or deck between those spaces should be an "A-60" class
division.
|
| (b)
|
For clarification as to which note applies see 9.2.1 and
9.2.3.
|
| (c)
|
Where spaces are of the same numerical category and superscript
"c" appears, a bulkhead or deck of the rating shown in the tables is only
required when the adjacent spaces are for a different purpose, e.g. in
category (9).A galley next to a galley does not require a bulkhead but a
galley next to a paint room requires an "A-O" bulkhead.
|
| (d)
|
Bulkheads separating the navigating bridge, chartroom and radio
room from each other may be "B-O" rating.
|
| *
|
Where an asterisk appears in the tables, the division should be
of steel or equivalent material, but need not be of "A" class standard.
However, where a deck is penetrated for the passage of electric cables,
pipes and vent ducts, such penetrations should be made tight to prevent the
passage of flame and smoke.
|
9.1.7 Windows and sidescuttles, with the exception
of navigating bridge windows, should be of the non-opening type. Navigating
bridge windows may be of the opening type provided the design of such
windows permits rapid closure. The Administration may permit windows
and sidescuttles outside hazardous areas to be of the opening type.
9.1.8 The fire resistance of doors should, as
far as practicable, be equivalent to that of the division in which
they are fitted. External doors in superstructures and deckhouses
should be constructed to at least "A-O" class standard and be self-closing,
where practicable.