MSC.1/Circ.1276
UNIFIED INTERPRETATIONS OF SOLAS CHAPTER II-2
(30
May 2008)
1.
The Maritime Safety Committee, at its eighty-fourth session (7 to 16 May 2008),
with a view to providing more specific guidance for application of the relevant
requirements of the 1974 SOLAS Convention, approved the unified interpretations
of SOLAS chapter II-2 prepared by the Sub-Committee on Fire Protection, at its
fifty-second session (14 to 18 January 2008), set out in the annex.
2.
Member Governments are invited to use the annexed unified interpretations as
guidance when applying relevant provisions of SOLAS chapter II-2 to fire
protection construction, installation, arrangements and equipment to be
installed on board ships of which the building contract is placed on or after 9
May 2008, and to bring the unified interpretations to the attention of all
parties concerned.
Annex.
UNIFIED INTERPRETATIONS OF SOLAS CHAPTER II-2
Regulation II-2/4.3.
Arrangements for gaseous fuel for domestic purposes
1.
A portion of open deck, recessed into a deck structure, machinery casing, deck
house, etc., utilized for the exclusive storage of gas bottles is considered
acceptable for the purpose of regulation II-2/4.3 provided that:
.1 such a recess
has an unobstructed opening, except for small appurtenant structures, such as
opening corner radii, small sills, pillars, etc. The opening may be provided
with grating walls and door; and
.2 the depth of
such a recess is not greater than 1 m.
2.
A portion of open deck meeting the above should be considered as open deck in
applying tables 9.1 to 9.8 of SOLAS chapter II-2.
Regulations
II-2/9.7.2.1, 9.7.2.2 and 9.7.5.2.1.
Separation of galley exhausts ducts from spaces
1.With
respect to the application of SOLAS regulations II-2/9.7.2.1, 9.7.2.2 and
9.7.5.2.1 for determining fire insulation for trunks and ducts which pass
through an enclosed space, the term "pass through" pertains to the
part of the trunk/duct contiguous to the enclosed space.
2.
The following sketches are given as examples:
Examples
of galley ducts contiguous to enclosed space
Regulation
II-2/10.5.6.
Fixed local application fire-extinguishing systems*
_____________
* The fixed local application
fire-fighting systems shall be approved based on the standards contained in the
Guidelines for the approval of fixed water-based local application
fire-fighting systems for use in category A machinery spaces (MSC/Circ.913).
1.
The end nozzles of a single line of nozzles should be positioned:
.1 outside the
hazard where paragraph 3.4.2.1 of the appendix to the annex to MSC/Circ.913 is
applicable, to the distance established in testing; and
.2 at the edge
or outside of the protected area where paragraph 3.4.2.2 of the appendix to the
annex to MSC/Circ.913 is applicable.
A
single nozzle should be located above the fire source and at the centre of an
area having dimensions D/2 x D/2.
Sketches
of acceptable arrangements are as follows:
1.1
System (utilizing a 3 x 3 nozzle grid)
that extinguishes fires referred to in paragraphs 3.3.2.1 to 3.3.2.3 of
the appendix to the annex to MSC/Circ.913
For
this system, the outer nozzles should be installed outside of the protected
area at a distance of at least 1/4 of the maximum nozzle spacing.
1.2
System (utilizing a 3 x 3 nozzle grid) that extinguishes fires referred to in
paragraphs 3.3.2.3 to 3.3.2.5 of the appendix to the annex to MSC/Circ.913
For
this system, outer nozzles can be located either at the edge of the protected
area or outside of the protected area.
1.3
System (utilizing a 2 x 2 nozzle grid)
that extinguishes fires referred to in paragraphs 3.3.2.3 to 3.3.2.5 of
the appendix to the annex to MSC/Circ.913
For
this system, outer nozzles can be located either at the edge of the protected
area or outside of the protected area.
1.4.1
System that extinguishes fires referred to in paragraphs 3.3.2.3 to 3.3.2.5 of
the appendix to the annex to MSC/Circ.913
For
this system, outer nozzles should be placed at least at the edge of the
protected area.
1.4.2
System that extinguishes fires referred to in paragraphs 3.3.2.1 to 3.3.2.3 of
the appendix to the annex to MSC/Circ.913
For
this system, the outer nozzles should be placed outside of the