Statutory Documents - MCA Publications - LY3 - The Large Commercial Yacht Code - 14B Structural Fire Protection - Vessels of 500GT and Over - 14B.2 - 14B.2.5 Fire integrity of bulkheads and decks
14B.2.5 Fire integrity of bulkheads and decks
14B.2.5.1 In addition to complying with the specific provisions for fire integrity of bulkheads and decks mentioned elsewhere in this section, the minimum fire integrity of bulkheads and decks should be as prescribed in tables 1 and 2.
14B.2.5.2 The following requirements should govern application of the tables:
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.1 Tables 1 and 2 should apply respectively to the bulkheads and decks separating adjacent spaces.
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.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 (9) below. The title of each category is intended to be typical rather than restrictive. The number in parentheses preceding each category refers to the applicable column or row in the tables.
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(1) Control stations
- Spaces containing emergency sources of power and lighting.
- Wheelhouse and chartroom.
- Spaces containing the vessel's radio equipment.
- Fire-extinguishing rooms.
- Fire control rooms and fire-recording stations
- Control room for propulsion machinery when located outside the machinery space.
- Spaces containing centralized fire alarm equipment.
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(2) Corridors and lobbies
- Guest and crew corridors and lobbies.
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(3) Accommodation spaces
- Cabins, dining rooms, lounges, offices, pantries containing no cooking appliances (other than equipment such as microwave cookers and toasters), and similar spaces.
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(4) Stairways
- Interior stairways, lifts and escalators (other than those wholly contained within the machinery space(s)) 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.
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(5) Service spaces (low risk)
- Lockers and store-rooms not having provisions for the storage of flammable liquids and having areas less than 4m2, and drying rooms and laundries.
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(6) Machinery spaces of category A,
- Spaces so defined.
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(7) Other machinery spaces
- Spaces so defined, excluding machinery spaces of category A.
- Sprinkler, drencher or fire pump spaces.
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(8) Service spaces (high risk)
- Galleys, pantries containing cooking appliances, paint and lamp rooms, lockers and store-rooms having areas of 4m2 or more, spaces for the storage of flammable liquids, workshops other than those forming part of the machinery spaces, and spaces containing vehicles or craft with fuel in their tanks, or lockers storing such fuels storage lockers for gaseous fuels for domestic purposes.
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(9) Open decks
- Open deck spaces and enclosed promenades having no fire risk. Air spaces (the space outside superstructures and deckhouses).
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14B.2.5.3 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.
14B.2.5.4 External boundaries which are required to be of steel or other equivalent material may be pierced for the fitting of windows and portlights provided that there is no requirement for such boundaries to have "A" class integrity elsewhere in this section. Similarly, in such boundaries which are not required to have "A" class integrity, doors may be of combustible materials, substantially constructed.
Table 1. Fire integrity of bulkheads separating adjacent spaces
| Spaces | (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | |
| Control stations | (1) | A-0c | A-0 | A-60 | A-0 | A-15 | A-60 | A-15 | A-60 | * |
| Corridors and lobbies | (2) | Cd | B-0d | A-0a
B-0d |
B-0d | A-60 | A-0 | A-0 | * | |
| Accommodation spaces | (3) | Cd | A-0a
B-0d |
B-0d | A-60 | A-0 | A-0 | * | ||
| Stairways | (4) | A-0a
B-0d |
A-0a
B-0d |
A-60 | A-0 | A-0 | * | |||
| Service spaces (low risk) | (5) | Cd | A-60 | A-0 | A-0 | * | ||||
| Machinery spaces of category A | (6) | * | A-0 | A-60 | * | |||||
| Other machinery spaces | (7) | A-0b | A-0 | * | ||||||
| Service spaces (high risk) | (8) | A-0b | * | |||||||
| Open decks | (9) |
Table 2. Fire integrity of decks separating adjacent spaces
| Spaces above | (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | |
| Spaces below | ||||||||||
| Control stations | (1) | A-0 | A-0 | A-0 | A-0 | A-0 | A-60 | A-0 | A-0 | * |
| Corridors and lobbies | (2) | A-0 | * | * | A-0 | * | A-60 | A-0 | A-0 | * |
| Accommodation spaces | (3) | A-60 | A-0 | * | A-0 | * | A-60 | A-0 | A-0 | * |
| Stairways | (4) | A-0 | A-0 | A-0 | * | A-0 | A-60 | A-0 | A-0 | * |
| Service spaces (low risk) | (5) | A-15 | A-0 | A-0 | A-0 | * | A-60 | A-0 | A-0 | * |
| Machinery spaces of category A | (6) | A-60 | A-60 | A-60 | A-60 | A-60 | * | A-60e | A-60 | * |
| Other machinery spaces | (7) | A-15 | A-0 | A-0 | A-0 | A-0 | A-0 | * | A-0 | * |
| Service spaces (high risk) | (8) | A-60 | A-0 | A-0 | A-0 | A-0 | A-60 | A-0 | A-0 | * |
| Open decks | (9) | * | * | * | * | * | * | * | * | - |
Note a For clarification on which applies, see 14B.2.4 and 14B.2.6.
Note b Where spaces are of the same numerical category and subscript b 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-0" bulkhead.
Note c Bulkheads separating the wheelhouse and chartroom from each other may be "B-0" rating.
Note d For the application of 14B.2.3.1, "B-O" and "C", where appearing in table 1, should be read as "A-0".
Note e Fire insulation need not be fitted if the machinery space in category (7), in the opinion of the Administration, has little or no fire risk.
Note * Where an asterisk appears in the tables, the division is required to be of steel or other equivalent material but is not required to be of "A" class standard.
For the application of 14B.2.3.1 an asterisk, where appearing in table 2, except for category (9), should be read as "A-0".
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