Vessel Fire Safety Regulations (SOR/2017-14)

222 (1) The trunks and ducts of ventilation systems must be constructed of non-combustible materials.

(2) If a trunk or duct serves spaces on both sides of an “A” class division, fire dampers must be fitted so as to prevent the spread of fire and smoke between compartments. Manual fire dampers must be operable from both sides of the division.

(3) If a trunk or duct has a free cross-sectional area of more than 0.02 m² and passes through an “A” class division, the trunk or duct must be fitted with an automatic-closing fire damper.

(4) If a trunk or duct serves compartments situated on only one side of an “A” class division, the opening in the division must be lined with a steel sheet sleeve unless the trunk or duct passing through the division is of steel in the vicinity of the passage and unless the portion of the trunk or duct in that vicinity

• (a) has sleeves that are at least 3 mm thick and 900 mm long and is insulated with fire insulation that has at least the same fire integrity as the division, if the trunk or duct has a free cross-sectional area of more than 0.02 m²; or

• (b) is fitted with automatic fire dampers that can be operated manually, if the trunk or duct has a free cross-sectional area of more than 0.085 m².

(5) A sleeve referred to in paragraph (4)(a) that passes through a bulkhead must be of the same length on either side of the bulkhead.

(6) Paragraph (4)(b) does not apply if the trunk or duct passes through a space surrounded by “A” class divisions without serving that space and the trunk or duct has the same fire integrity as the divisions through which it passes.