Section 2 Offshore Accommodation Units

201. General

1. Application

The requirements in this Section apply to offshore accommodation units.

2. Definition

Offshore accommodation unit is a unit primarily intended for the accommodation of persons who are industrial personnel, engaged in some aspect of offshore or related employment, excluding mem- bers of the crew. In addition, during jacking or moving operation of this unit, there is not to be anyone except operator for these operation on board.

202. Hull construction and equipment

1. Hull construction

(1) Hull construction is to be in accordance with the requirements in Ch 3 to 6, depending on the type of the unit. In this case, where approved by the Society, suitable modification may be done in accordance with the environmental condition of the areas where the unit is stationed.

(2) Decks, provided with mooring equipment such as bollards, etc., are to be sufficiently reinforced.

2. Mooring equipment

Mooring equipment, sufficiently effective for stationing the unit, is to be provided. In this case, temporary mooring equipment specified in Ch 3, 801. need not be provided.

203. Fire protection

1. For the unit intended for the accommodation of more than 36 persons, fire protection are to com- plied with the following requirements in addition to those in Ch 9, 201.

(1) Main vertical zones are to be complied with the following requirements.

(A) The hull, superstructure and deckhouses in way of accommodation and service spaces shall be subdivided into main vertical zones by "A" class divisions. These divisions are to have insulation values in accordance with Table 9.1 and 9.2 in Ch 9, 201.

(B) As far as practicable, the bulkheads forming the boundaries of the main vertical zones above the bulkhead deck shall be in line with watertight subdivision bulkheads situated im- mediately below the bulkhead deck. The length and width of main vertical zones may be extended to a maximum of 48 m in order to bring the ends of main vertical zones to co- incide with watertight subdivision bulkheads or in order to accommodate a large public space extending for the whole length of the main vertical zone provided that the total area

of the main vertical zone is not greater than 1,600 mĪ on any deck. The length or width of

a main vertical zone is the maximum distance between the furthermost points of the bulk- heads bounding it.

(D) Such bulkheads shall extend from deck to deck and to the shell or other boundaries.

(2) Corridor bulkheads, where not required to be "A" class, shall be "B" class divisions which shall extend from deck to deck except:

(A) when continuous "B" class ceilings or linings are fitted on both sides of the bulkhead, the

portion of the bulkhead behind the continuous ceiling or lining shall be of material which, in thickness and composition, is acceptable in the construction of "B" class divisions, but which shall be required to meet "B" class integrity standards only in so far as is reasonable and practicable in the opinion of the Society; and

(B) in the case of a ship protected by an automatic sprinkler system complying with the provi-

sions of the

Fire Safety Systems Code, the corridor bulkheads of "B" class material may

terminate at struction of

a ceiling in the corridor provided such ceilings are "B" class divisions. All doors and frames in such

acceptable in the con- bulkheads shall be of

(3)

non-combustible materials and shall have the same fire integrity as the bulkhead in which they are fitted.

Exterior boundaries of superstructures and deckhouses enclosing accommodation and including

any overhanging decks which support such accommodation, are to be an “A-60” Class boundary for the whole of the portion which faces and is within 30 m of any area in the adjacent drill- ing or production platform served by the accommodation unit where a hydrocarbon fire may arise. If the distance is more than 30 m, but less than 100 m, an “A-0” Class boundary is required.

204. Fire fighting

1. For the unit intended for the accommodation of more than 36 persons, fire fighting are to complied with the following requirements in addition to those in Ch 9, Sec 3.

(1) The arrangements for the ready availability of water supply shall be:

(A) such that at least one effective jet of water is to immediately available from any hydrant in an interior location and so as to ensure the continuation of the output of water by the auto- matic starting of one required fire pump; and

(B) if fitted with periodically unattended machinery spaces, the Society shall determine provi- sions for fixed water fire-extinguishing arrangement for such spaces equivalent to those re-

quired for normally attended machinery spaces.

(2) There shall be installed throughout each separate zone in all accommodation and service spaces and, where it is considered necessary, in control stations, except spaces which afford no sub-

stantial fire risk such as void spaces, sanitary spaces, etc., either:

(A) a fixed fire detection and fire alarm system so installed and arranged as to detect the pres-

ence of fire in such spaces and providing smoke detection in corridors, stairways and escape routes within accommodation spaces. Detectors fitted in cabins, when activated, shall also be capable of emitting, or cause to be emitted, an audible alarm within the space where they are located.; or

(B) an automatic sprinkler, fire detection and fire alarm system of an approved type complying with the relevant requirements of the Fire Safety Systems Code and so installed and ar- ranged as to protect such spaces and, in addition, a fixed fire detection and fire alarm sys- tem and so installed and arranged as to provide smoke detection in corridors, stairways and

escape routes within accommodation spaces.