Hull Construction Regulations

60 (1) The hull, superstructure and deck houses shall be subdivided by “A” Class divisions into main vertical zones, the mean length of which, above the bulkhead deck, shall not in general exceed 40 m and, where steps are necessary, they shall be of “A” Class divisions.

(2) As far as practicable the portions of the “A” Class divisions above the bulkhead deck shall be in line with watertight subdivision bulkheads situated immediately below the bulkhead deck and shall extend from deck to deck and to the shell or other boundaries.

(3) On ships designed for special purposes, such as automobile or railroad car ferries, where installation of “A” Class divisions 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 Board.