Part 3 - Test for “A”, “B”
and “F” Class Divisions
1 Application
Where products (such as decks, bulkheads, doors, ceilings,
linings, windows, fire dampers, pipe penetrations and cable transits)
are required to be "A" or "B" or "F" class divisions, they shall comply
with this partfootnote.
2 Fire test procedure
2.3 Where thermal radiation
through windows is required to be limited, the window assembly may
be tested and evaluated in accordance with appendix 1 of this part.
2.4 Where ceilings or linings
are required to be continuous "B" class ceilings or linings they may
be tested and evaluated in accordance with appendix 2 of this part.
2.1 The products shall be
tested and evaluated in accordance with the fire test procedure specified
in resolution A.754(18). This contains test procedures also for windows,
fire dampers and pipe and duct penetrations in its appendices.
2.2 Specimen sizes
2.2.1 For the purpose of this Code, the first
sentence of paragraphs 2.1.1, 2.4.1 and 2.7.1 of the Annex to resolution A.754(18) is replaced by the
following:
"The minimum overall dimensions of test specimen, including
the perimeter details at the top, bottom and vertical edges, are 2,440
mm width and 2,500 mm height, except that the minimum overall dimensions
of 2,440 mm in height and 4.65 m2 in the exposed surface
of the test specimen may be used in testing up to 31 December 1998.
The approval expiry date is 31 December 2003 for approvals based on
tests with such smaller test specimen."
2.2.2 For the purpose of this Code, the first
sentence of paragraphs 2.2.1, 2.5.1 and 2.8.1 of the Annex to resolution A.754(18) is replaced by the
following:
"The minimum overall dimensions of test specimen, including
the perimeter details at all the edges, are 2,440 mm width and 3,040
mm length, except that the minimum overall dimensions of 2,440 mm
in length and 4.65 m2 in the exposed surface of the test
specimen may be used in testing up to 31 December 1998. The approval
expiry date is 31 December 2003 for approvals based on tests with
such smaller test specimen."
2.2.3 The specimen sizes shall be given in the
test reports
3 Additional requirements
3.1 The integrity of class "B" constructions shall
be achieved with non-combustible materials. Adhesives used in the
construction of the specimen are not required to be non-combustible,
however, for the purpose of this Code, they shall have low flame-spread
characteristics.
3.2 Materials placed at "B" class panel joints
for avoiding vibration or noise transmission shall be of low flame
spread characteristics and fire tested with "B" class divisions along
which they are used. However, such materials shall be non-combustible
if they are necessary to support the non-combustible "B" class structure
or to achieve the required integrity.
3.3 Doors and shutters, which are fitted above
the bulkhead deck and which are required to meet both fire protection
and watertight requirements, shall comply with the fire protection
requirements as required in the Convention, for the divisions where
they are installed. The watertight doors fitted below the bulkhead
deck are not required to be insulated.
4 Other references
4.1 The non-combustibility of materials used in
"A" and "B" class divisions shall be verified in accordance with part 1.
4.2 Where combustible veneers are allowed to be
provided in "A" and "B" class divisions, the low flame spread characteristics
of such veneers, if required, shall be verified in accordance with part 5.
Appendix 1 - Thermal Radiation Test
Supplement to Fire Resistance Tests for Windows in “A”,
“B” and “F” Class Divisions
1 Scope
1.1 This appendix specifies a procedure for measuring
heat flux through windows as a basis for characterizing their ability
to limit the heat radiation in order to prevent the spread of fire
and to enable escape routes to pass near the windows.
1.2 This procedure is an optional requirement
and may be requested by some Administrations for windows in specific
areas of a ship.
2 Test procedure
2.1 The window should be tested in accordance
with resolution A.754(18) using
the additional instrumentation as described below.
2.2 The term "window" includes windows, side scuttles
and any other glazed opening provided for light transmission or vision
purposes in a fire resistant division. The term "fire resistant division"
includes bulkheads and doors.
3 Additional instrumentation
3.1 Additional instrumentation consists of a restricted-view
total-heat fluxmeter calibrated with the restricted view to indicate
incident heat flux. The fluxmeter should be water-cooled and capable
of measuring heat flux 0 to 60 kW/m2. The fluxmeter should
be calibrated at least once a year against a standard device.
3.2 The fluxmeter should be placed perpendicular
to the centre of the window being tested, and in a position such that
the centre of the fluxmeter's view coincides with the centre of the
windowfootnote (see the figure). The fluxmeter should be located at a distance greater than
0.5 m from the window, such that the view of the fluxmeter just includes
part of the frame. However, the fluxmeter should not be located more
than 2.5 m from the window. The dimension of the boundary and window
frame seen by the fluxmeter, which remains outside the window should
not exceed 10% of the total width seen by the fluxmeter on the surface
of the sample. It should be calculated on the basis of restricted
view angle of the fluxmeter and its distance to the sample surface.
Figure 1
3.3 For windows whose greater dimension is less
than 1.57 times the smaller dimension, only one fluxmeter is needed.
3.4 For oblong windows whose greater dimension
is more than 1.57 times the smaller dimension, additional fluxmeters
should be provided. The distance of the fluxmeters from the window
should be adjusted such that the fluxmeters' view covers at least
50% of the window. However, the fluxmeters should not be located less
than 0.5 m nor more than 2.5 m from the window.
4 Classification criteria
4.1 The peak heat
flux (Ew) should be measured for the first 15 min
of the test, for the first 30 min of the test, and for the entire
duration of the test (i.e. 60 min for class "A" and 30 min for class
"B" boundaries).
Table 1 Criteria for heat
flux
| Table 1 — Criteria for heat flux
|
| Fire resistant division classification
|
Time period from beginning of test to
|
Heat flux Ec(kW/m2
|
| A-0
|
60
minutes
|
56.5
|
| A-15
|
15
minutes
|
2.34
|
| 60
minutes
|
8.0
|
| A-30
|
30
minutes
|
2.34
|
| 60
minutes
|
6.4
|
| A-60
|
60
minutes
|
2.34
|
| B-0
|
30
minutes
|
36.9
|
| B-15
|
15
minutes
|
2.34
|
| 30
minutes
|
4.3
|
4.2 The peak heat fluxes (Ew) measured
in accordance with paragraph 4.1 should be compared against the reference
value (Ec) from the table.
4.3 If (Ew) is less than (Ec),
the window is acceptable for installation in a boundary of the corresponding
fire resistant classification.
Appendix 2 - Continuous “B”
Class Divisions
1 Scope
1.1 This appendix specifies the procedure for
testing linings and ceilings for verifying that they are "continuous
'B' class linings" and "continuous 'B' class ceilings" and for evaluating
full constructions to be "continuous 'B' class constructions".
1.2 This procedure is an optional requirement
and may be requested by some Administrations for continuous "B" class
divisions.
2 Test procedure and evaluation
2.1 The linings, ceilings and constructions should
be evaluated in accordance with resolution
A.754(18) using the arrangements described below.
2.2 The ceilings should be tested in accordance
with paragraph 2.8 of the Annex
to resolution A.754(18) except that the ceiling should be mounted
on the horizontal furnace so that at least 150 mm high "B" class bulkheads
are mounted on the furnace and the ceiling is fixed to these partial
bulkheads by using the joining method as is intended to be used in
practice. Such ceilings and the joining methods should be evaluated
as required for ceilings in accordance with resolution
A.754(18) and accordingly they should be classified as "continuous
'B' (B-0 or B-15, as applicable) class ceilings".
2.3 A lining which has been evaluated in accordance
with resolution A.754(18) to be
a "B" (B-0 or B-15, as applicable on basis of the lining test) class
lining may be considered forming "continuous 'B' (B-0 or B-15, as
applicable) class lining" in conjunction with a "continuous 'B' (B-0
or B-15, as applicable) class ceiling" and with the joining method
used in the test (see paragraph 2.2 above) without further testing
the lining.
2.4 An enclosed construction installed on an "A"
class deck and formed by "continuous 'B' (B-0 or B-15, as applicable)
class linings" and "continuous 'B' (B-0 or B-15, as applicable) class
ceiling" should be considered forming "continuous 'B' class construction".
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