.2 Ships carrying not more than 36 passengers

.1 Ventilation ducts shall be of non-combustible material. Short ducts, however, not generally exceeding two metres in length and with a cross-section not exceeding 0,02 m^(2) need not be non-combustible, subject to the following conditions: these ducts shall be of a material which, in the opinion of the Administration of the flag State, has a low fire risk; they may only be used at the end of the ventilation device; they shall not be situated less than 600 mm, measured along the duct, from an opening in an ‘A’ or ‘B’ class division, including continuous ‘B’ class ceilings. instead of subparagraph .1 the following subparagraph .1a shall apply: these ducts shall be of a material which has low flame spread characteristics. .2a Where the ventilation ducts with a free-sectional area exceeding 0,02 m^(2) pass through class ‘A’ bulkheads or decks, the openings shall be lined with a steel sheet sleeve unless the ducts passing through the bulkheads or decks are of steel in the vicinity of passage through the deck or bulkhead and the ducts and sleeves shall comply in this part with the following: The sleeves shall have a thickness of at least 3 mm and a length of at least 900 mm. When passing through bulkheads, this length shall be divided preferably into 450 mm on each side of the bulkhead. These ducts, or sleeves lining such ducts, shall be provided with fire insulation. The insulation shall have at least the same fire integrity as the bulkhead or deck through which the duct passes. Ducts with a free cross-sectional area exceeding 0,075 m^(2) shall be fitted with fire dampers in addition to the requirements of paragraph .9.2.2.1. The fire damper shall operate automatically but shall also be capable of being closed manually from both sides of the bulkhead or deck. The damper shall be provided with an indicator which shows whether the damper is open or closed. Fire dampers are not required, however, where ducts pass through spaces surrounded by ‘A’ class divisions, without serving those spaces, provided those ducts have the same fire integrity as the divisions which they pierce. Fire dampers shall be easily accessible. In new class B, C and D ships constructed on or after 1 January 2003, where fire dampers are placed behind ceilings or linings, these ceilings or linings shall be provided with an inspection door on which a plate reporting the identification number of the fire damper is provided. The fire damper identification number shall also be placed on any remote controls required. .2b In new class B, C and D ships constructed on or after 1 January 2003, where a thin plated duct with a free cross-sectional area equal to or less than 0,02 m^(2) passes through ‘A’ class bulkheads or decks, the opening shall be lined with a steel sleeve having a thickness of at least 3 mm and a length of at least 200 mm, divided preferably into 100 mm on each side of the bulkhead or, in the case of the deck, wholly laid on the lower side of the decks pierced. .3 Ducts provided for the ventilation of machinery spaces, galleys, car deck spaces, ro-ro cargo spaces or special category spaces shall not pass through accommodation spaces, service spaces or control stations unless they comply with the conditions specified in paragraphs .9.2.3.1.1 to .9.2.3.1.4 or .9.2.3.2.1 and .9.2.3.2.2: the ducts are constructed of steel having a thickness of at least 3 mm and 5 mm for ducts the widths or diameters of which are up to and including 300 mm and 760 mm and over respectively and, in the case of such ducts, the widths or diameters of which are between 300 mm and 760 mm having a thickness to be obtained by interpolation; the ducts are suitably supported and stiffened; the ducts are fitted with automatic fire dampers close to the boundaries penetrated; and the ducts are insulated to ‘A-60’ standard from the machinery spaces, galleys, car deck spaces, ro-ro cargo spaces or special category spaces to a point at least 5 metres beyond each fire damper; or the ducts are constructed of steel in accordance with paragraphs .9.2.3.1.1 and .9.2.3.1.2; and the ducts are insulated to ‘A-60’ standard throughout the accommodation spaces, service spaces or control stations; except that penetrations of main zone divisions shall also comply with the requirements of paragraph .9.2.8. In new class B, C and D ships constructed on or after 1 January 2003, the ventilation systems for machinery spaces of category A, vehicle spaces, ro-ro spaces, galleys, special category spaces and cargo spaces shall, in general, be separated from each other and from the ventilation systems serving other spaces. Except that the galley ventilation systems on passenger ships carrying not more than 36 passengers need not be completely separated, but may be served by separate ducts from a ventilation unit serving other spaces. In any case an automatic fire damper shall be fitted in the galley ventilation duct near the ventilation unit. .4 Ducts provided for ventilation to accommodation spaces, service spaces or control stations shall not pass through machinery spaces, galleys, car deck spaces, ro-ro cargo spaces or special category spaces unless they comply with the conditions specified in paragraphs .9.2.4.1.1 to .9.2.4.1.3 or .9.2.4.2.1 and .9.2.4.2.2: the ducts where they pass through a machinery space, galley, car deck space, ro-ro cargo space or special category space are constructed of steel in accordance with paragraphs .9.2.3.1.1 and .9.2.3.1.2; automatic fire dampers are fitted close to the boundaries penetrated; and the integrity of the machinery space, galley, car deck space, ro-ro cargo space or special category space boundaries is maintained at the penetrations; or the ducts where they pass through a machinery space, galley, car deck space, ro-ro cargo space or special category space are constructed of steel in accordance with paragraphs .9.2.3.1.1 and .9.2.3.1.2; and the ducts are insulated to ‘A-60’ standard throughout the machinery space, galley, car deck space, ro-ro cargo space or special category space; except that penetrations of main zone divisions shall also comply with the requirements of paragraph .9.2.8. .5 Ventilation ducts with a free-sectional area exceeding 0,02 m^(2) passing through class ‘B’ bulkheads shall be lined with steel sheet sleeves of 900 mm in length divided preferably into 450 mm on each side of the bulkheads unless the duct is of steel for this length. .6 Such measures as are practicable shall be taken in respect of control stations outside machinery spaces in order to ensure that ventilation, visibility and freedom from smoke are maintained, so that in the event of fire the machinery and equipment contained therein may be supervised and continue to function effectively. Alternative and separate means of air supply shall be provided; air inlets of the two sources of supply shall be so disposed that the risk of both inlets drawing in smoke simultaneously is minimised. Such requirements need not apply to control stations situated on, and opening on to, an open deck, or where local closing arrangements would be equally effective. .7 Where they pass through accommodation spaces or spaces containing combustible materials, the exhaust ducts from galley ranges shall be constructed of ‘A’ class divisions. Each exhaust duct shall be fitted with: a grease trap readily removable for cleaning; a fire damper located in the lower end of the duct; arrangements, operable from within the galley, for shutting off the exhaust fans; and fixed means for extinguishing a fire within the duct. .8 Where it is necessary that a ventilation duct passes through a main vertical zone division, a fail-safe automatic closing fire damper shall be fitted adjacent to the division. The damper shall also be capable of being manually closed from each side of the division. The operating position shall be readily accessible and be marked in red light-reflecting colour. The duct between the division and the damper shall be of steel or other equivalent material and, if necessary, insulated to comply with the requirements of Regulation II-2/A/12.1. The damper shall be fitted on at least one side of the division with a visible indicator showing whether the damper is in the open position. The main inlets and outlets of all ventilation systems shall be capable of being closed from outside the spaces being ventilated. Power ventilation of accommodation spaces, service spaces, cargo spaces, control stations and machinery spaces shall be capable of being stopped from an easily accessible position outside the space being served. This position should not be readily cut off in the event of a fire in the spaces served. The means provided for stopping the power ventilation of the machinery spaces shall be entirely separate from the means provided for stopping ventilation of other spaces.

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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.