C62 SAFETY OF LIFE AT SEA 



(3) adequate provision is made to ensure that in the event of fire, arrange 



ments for stowage, launching and embarkation into survival era 

 remain as effective as . if the superstructure were constructed of 

 steel; 



(4) crowns and casings of boiler and machinery spaces are of steel con- 



struction adequately insulated, and the openings therein, if any, 

 are suitably arranged and protected to prevent spread of fire. 



(c) Method III 



(i) The hull, superstructure, structural bulkheads, decks and deckhouses 

 shall be constructed of steel or other equivalent material. 



(ii) Where fire protection in accordance with Method III is employed, the 

 superstructure may be constructed of, for example, aluminium alloy, provided 

 that : — 



(1) the temperature rise of the metallic cores of the " A " Class divisions, 



when exposed to the standard fire test, shall have regard to the 

 mechanical properties of the material; 



(2) the Administration shall be satisfied that the amount of combustible 



materials used in the relevant part of the ship is suitably reduced. 

 Ceilings {i.e., linings of deck heads) shall be incombustible; 



(3) adequate provision is made to ensure that in the event of fire, arrange- 



ments for stowage, launching and embarkation into survival craft 

 remain as effective as if the superstructure were constructed of 

 steel; 



(4) crowns and casings of boiler and machinery spaces are of steel con- 



struction adequately insulated, and the openings therein, if any, 

 are suitably arranged and protected to prevent spread of fire. 



Regulation 37 



Main Vertical Zones {Methods I, II and 111) 



(a) The hull, superstructure and deckhouses shall be subdivided into 

 main vertical zones. Steps and recesses shall be kept to a minimum, but 

 where they are necessary, they shall be of " A " Class divisions. 



(6) 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 immediately below the bulkhead deck. 



(c) Such bulkheads shall extend from deck to deck and to the shell or 

 other boundaries. 



(d) On ships designed for special purposes, such as automobile or railroad 

 car ferries, where installation of such bulkheads would defeat the purpose 

 for which the ship is intended, equivalent means for controlling and limiting 

 a fire shall be substituted and specifically approved by the Administration. 



Ch." 2 



