3 Bulkheads within a main vertical zone (R 25)

For new ships carrying more than 36 passengers all bulkheads which are not required to be ‘A’ class divisions shall be at least ‘B’ class or ‘C’ class divisions as prescribed in the tables in Regulation 4. All such divisions may be faced with combustible materials in accordance with the provisions of Regulation 11. For new ships carrying not more than 36 passengers and existing class B ships carrying more than 36 passengers all bulkheads within accommodation and service spaces which are not required to be ‘A’ class divisions shall be at least ‘B’ class or ‘C’ class divisions as prescribed in the tables in Regulation 5. If such divisions may be faced with combustible materials in accordance with the provisions of Regulation 11. In new class B, C and D ships carrying not more than 36 passengers and in existing class B ships carrying more than 36 passengers all corridor bulkheads where not required to be ‘A’ class shall be ‘B’ class divisions which shall extend from deck to deck except: 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 case of a ship protected by an automatic sprinkler system complying with the provisions of Regulation II-2/A/8, the corridor bulkheads of ‘B’ class materials may terminate at a ceiling in the corridor provided such ceiling is of material which, in thickness and composition, is acceptable in the construction of ‘B’ class divisions. Notwithstanding the requirements of Regulations 4 and 5, such bulkheads and ceilings shall be required to meet ‘B’ class integrity standards only in so far as is reasonable and practicable. All doors and frames in such bulkheads shall be of non-combustible materials and shall be so constructed and erected as to provide substantial fire resistance. All bulkheads required to be ‘B’ class division, except corridor bulkheads prescribed in paragraph .2, shall extend from deck to deck and to the shell or other boundaries unless the continuous ‘B’ class ceilings or linings fitted on both sides of the bulkheads are at least of the same fire resistance as the bulkhead, in which case the bulkhead may terminate at the continuous ceiling or lining.

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Source: EUR-Lex (Cellar) · retrieved 2026-11-10 · Text as adopted (Official Journal); later amendments are not incorporated in this text.