C64 SAFETY OF LIFE AT SEA 



Chapter. All doorways and similar openings shall have a method of closurj 

 consistent with the type of bulkhead in which they are situated. 



(ii) All corridor bulkheads shall extend from deck to deck. Ventilation 

 openings may be permitted in the doors in " B " Class bulkheads, preferably 

 in the lower portion. All other enclosure bulkheads shall extend from deck 

 to deck vertically, and to the shell or other boundaries transversely, unless 

 incombustible ceilings or linings such as will ensure fire integrity are fitted, 

 in which case the bulkheads may terminate at the ceilings or linings. 



(b) Method III 



(i) Within the accommodation spaces, enclosure bulkheads other than 

 those required to be of " A " Class divisions shall be constructed of 

 " B " Class divisions, and shall be of incombustible materials which may, 

 however, be faced with combustible materials in accordance with 

 Regulation 48 of this Chapter. These bulkheads shall form a continuous 

 network of fire-retarding bulkheads within which the area of any one 

 compartment shall not in general exceed 1,300 square feet (or 120 square 

 metres) with a maximum of 1,600 square feet (or 150 square metres); they 

 shall extend from deck to deck. All doorways and similar openings shall 

 have a method of closure consistent with the type of bulkhead in which they 

 are situated. 



(ii) Each public space larger than 1,600 square feet (or 150 square metres) 

 shall be surrounded by " B " Class divisions of incombustible materials. 



(iii) The insulation of " A " Class and " B " Class divisions, except those 

 constituting the separation of the main vertical zones, the control stations, 

 the stairway enclosures, and the corridors, may be omitted when the divisions 

 constitute the outside part of the ship or when the adjoining compartment does 

 not contain fire hazard. 



(iv) All corridor bulkheads shall be of " B " Class divisions and shall 

 extend from deck to deck. Ceilings, if fitted, shall be of incombustible 

 materials. Ventilation openings may be permitted in doors, preferably in 

 the lower portion. All other partition bulkheads shall also extend from 

 deck to deck vertically and to the shell or other boundaries transversely, 

 unless incombustible ceilings or linings are fitted, in which case the bulkheads 

 may terminate at the ceilings or linings. 



(v) " B " Class divisions other than those required to be of the 

 incombustible type shall have incombustible cores or be of an assembled 

 type having internal layers of sheet asbestos or similar incombustible material. 

 The Administration may, however, approve other materials without 

 incombustible cores, provided that equivalent fire-retarding properties are 

 ensured. 



Ch. 2 



il 



