This circular was published on December 5th, 2022.
The Maritime Safety Committee, at its 106th session (2 to 11 November 2022), with a view to providing more specific guidance on SOLAS regulation II-2/9, approved unified interpretations of SOLAS chapter II-2, prepared by the Sub-Committee on Ship Systems and Equipment, at its eighth session (28 February to 4 March 2022), as set out in the annex.
Member States are invited to use the annexed unified interpretations as guidance when applying SOLAS regulation II-2/9, and to bring the unified interpretations to the attention of all parties concerned.
Annex: Unified interpretations of SOLAS chapter II-2
CHAPTER II-2: CONSTRUCTION – FIRE PROTECTION, FIRE DETECTION, AND FIRE EXTINCTION
Regulation II-2/188.8.131.52.2 – Containment of fire, details of fire dampers and duct penetrations
The fire insulation required by regulation SOLAS II-2/184.108.40.206.2 should be provided only to the part of the duct and/or sleeve that is on the same side of the division being fire insulated, and be extended for a minimum of 450 mm along the duct and/or sleeve.
Regulation II-2/220.127.116.11 – Containment of fire, details of fire dampers and duct penetrations
When a duct passing through a division is to be in accordance with SOLAS regulations II-2/9.3.2 and II-2/18.104.22.168, no clearance should be allowed between the duct and the division.