Division .4 F1
United Kingdom
Where a main vertical zone is subdivided by horizontal ‘ A ’ class divisions into horizontal zones for the purpose of providing an appropriate barrier between sprinkled and non-sprinklered zones of the ship, the divisions shall extend between adjacent main vertical zone bulkheads and to the shell or exterior boundaries of the ship and shall be insulated in accordance with the fire insulation and integrity values given in table 4.2 for new ships carrying more than 36 passengers, and existing class B ships carrying more than 36 passengers.