FTSG Resolutions 10/04/12 Page 1 of 92 FTSG RESOLUTIONS This document of FTSG resolutions was issued by the Company Secretary 2 nd May 2006. TABLE OF CONTENTS No. 1 Moisture Content ...........................................................................................................................3 No. 2 Moisture Content Limits .................................................................................................................4 No. 3 Moisture Content ...........................................................................................................................5 No. 4 Measurement of moisture content of timber..................................................................................6 No. 5 Measurement of moisture content of masonry and concrete materials ........................................7 No. 6 Conditioning of solvent or water based coatings ...........................................................................8 No. 7 Positioning of furnace thermocouples ...........................................................................................9 No. 8 Furnace Pressure ........................................................................................................................10 No. 9 Furnace time temperature curve tolerances................................................................................11 No. 10 Furnace pressure when testing a suspended ceiling ..................................................................12 No. 13 Insulation failure by virtue of integrity failure................................................................................13 No. 15 Classification of fire resistance periods. ......................................................................................14 No. 16 Calibrating the surface spread of flame test apparatus ...............................................................15 No. 18 Failure criteria for fire resistance testing of suspended ceiling systems .....................................16 No. 19 Steel beam test configuration for BS 476: Part 8: 1972, Section 6 .............................................17 No. 20 Standard beam size configuration for a BS 476: Part 8 :1972 Section 5 test. ............................18 No. 21 Selection of steel beams for loaded and unloaded fire resistance testing. .................................19 No. 22 Documentation & observations required of expansion devices used in suspended ceilings. .....20 No. 23 Limitations on the results due to specimen behaviour. ...............................................................21 No. 24 Determination of the mean temperature of steel beams .............................................................22 No. 25 Measurement of Moisture Content ..............................................................................................23 No. 26 Cautionary statement on monitored values .................................................................................24 No. 27 Statement of practice with regard to measured values. ..............................................................25 No. 28 Procedure for agreeing resoloutions. ..........................................................................................26 No. 29 Applicability of the deflection criteria in a loaded test ..................................................................27 No. 30 Positioning of thermocouples for door and shutter assemblies ...................................................28 No. 31 Pressure conditions when testing non-separating elements .......................................................30 No. 32 Loading advise for clients conducting loaded steel section fire resistance tests.........................31 No. 33 Moisture Content .........................................................................................................................34 No. 34 Positioning of furnace thermocouples .........................................................................................36 No. 35 Use of cotton pad and intepretation of integrity failure. ...............................................................37 No. 36 Suspended ceiling test configuration. ..........................................................................................38 No. 37 Test configuration for beams with three-sided exposure. ...........................................................39 No. 38 Loaded beam section ..................................................................................................................40 No. 39 Test specimen requirements for valid testing. .............................................................................41 No. 40 Limitation on application of deflection criteria ..............................................................................42 No. 41 Threshold detail for doors without a threshold detail. ..................................................................43 No. 42 Design of the roving thermocouple. .............................................................................................44 No. 43 Statement in report regarding use of FTSG Resolutions. ...........................................................45 No. 44 Classification of fire resistance durations. ...................................................................................46 No. 45 Loading ........................................................................................................................................47 No. 46 Applicability of Results .................................................................................................................48 No. 47 Deflection Criteria ........................................................................................................................49 No. 48 Door Threshold Details ................................................................................................................50 No. 50 Limitations on use of results ........................................................................................................51 No. 51 Door Threshold Details ................................................................................................................52 No. 53 Testing to BS 476:Part8:1972 Versus BS 476:Parts 20-23:1987. ...............................................53 No. 55 Minimum Number of Loading Points for Horizontal Separating Elements. .................................54 No. 56 Revision of 6.4.2.5 and C.2.2.4 Relating to Frequency of Measurement ....................................55 No. 57 Revision of 6.1.8 Relating to Time of Commencement of Heating Period ..................................56 No. 58 Use of the Cotton Pad .................................................................................................................57 No. 59 Reduced Size Furnaces ..............................................................................................................58 No. 60 Loading on Stud Walls (Discrete Loadbearing Members) ..........................................................59 No. 61 Tolerance on Radiation Levels as Measured by the Four Copper Disc Radiometers in the Roof Test Apparatus. ........................................................................................................................................60
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FTSG Resolutions 10/04/12 Page 1 of 92
FTSG RESOLUTIONS
This document of FTSG resolutions was issued by the Company Secretary 2
nd May 2006.
TABLE OF CONTENTS
No. 1 Moisture Content ...........................................................................................................................3 No. 2 Moisture Content Limits .................................................................................................................4 No. 3 Moisture Content ...........................................................................................................................5 No. 4 Measurement of moisture content of timber ..................................................................................6 No. 5 Measurement of moisture content of masonry and concrete materials ........................................7 No. 6 Conditioning of solvent or water based coatings ...........................................................................8 No. 7 Positioning of furnace thermocouples ...........................................................................................9 No. 8 Furnace Pressure ........................................................................................................................10 No. 9 Furnace time temperature curve tolerances................................................................................11 No. 10 Furnace pressure when testing a suspended ceiling ..................................................................12 No. 13 Insulation failure by virtue of integrity failure ................................................................................13 No. 15 Classification of fire resistance periods. ......................................................................................14 No. 16 Calibrating the surface spread of flame test apparatus ...............................................................15 No. 18 Failure criteria for fire resistance testing of suspended ceiling systems .....................................16 No. 19 Steel beam test configuration for BS 476: Part 8: 1972, Section 6 .............................................17 No. 20 Standard beam size configuration for a BS 476: Part 8 :1972 Section 5 test. ............................18 No. 21 Selection of steel beams for loaded and unloaded fire resistance testing. .................................19 No. 22 Documentation & observations required of expansion devices used in suspended ceilings. .....20 No. 23 Limitations on the results due to specimen behaviour. ...............................................................21 No. 24 Determination of the mean temperature of steel beams .............................................................22 No. 25 Measurement of Moisture Content ..............................................................................................23 No. 26 Cautionary statement on monitored values .................................................................................24 No. 27 Statement of practice with regard to measured values. ..............................................................25 No. 28 Procedure for agreeing resoloutions. ..........................................................................................26 No. 29 Applicability of the deflection criteria in a loaded test ..................................................................27 No. 30 Positioning of thermocouples for door and shutter assemblies ...................................................28 No. 31 Pressure conditions when testing non-separating elements .......................................................30 No. 32 Loading advise for clients conducting loaded steel section fire resistance tests .........................31 No. 33 Moisture Content .........................................................................................................................34 No. 34 Positioning of furnace thermocouples .........................................................................................36 No. 35 Use of cotton pad and intepretation of integrity failure. ...............................................................37 No. 36 Suspended ceiling test configuration. ..........................................................................................38 No. 37 Test configuration for beams with three-sided exposure. ...........................................................39 No. 38 Loaded beam section ..................................................................................................................40 No. 39 Test specimen requirements for valid testing. .............................................................................41 No. 40 Limitation on application of deflection criteria ..............................................................................42 No. 41 Threshold detail for doors without a threshold detail. ..................................................................43 No. 42 Design of the roving thermocouple. .............................................................................................44 No. 43 Statement in report regarding use of FTSG Resolutions. ...........................................................45 No. 44 Classification of fire resistance durations. ...................................................................................46 No. 45 Loading ........................................................................................................................................47 No. 46 Applicability of Results .................................................................................................................48 No. 47 Deflection Criteria ........................................................................................................................49 No. 48 Door Threshold Details ................................................................................................................50 No. 50 Limitations on use of results ........................................................................................................51 No. 51 Door Threshold Details ................................................................................................................52 No. 53 Testing to BS 476:Part8:1972 Versus BS 476:Parts 20-23:1987. ...............................................53 No. 55 Minimum Number of Loading Points for Horizontal Separating Elements. .................................54 No. 56 Revision of 6.4.2.5 and C.2.2.4 Relating to Frequency of Measurement ....................................55 No. 57 Revision of 6.1.8 Relating to Time of Commencement of Heating Period ..................................56 No. 58 Use of the Cotton Pad .................................................................................................................57 No. 59 Reduced Size Furnaces ..............................................................................................................58 No. 60 Loading on Stud Walls (Discrete Loadbearing Members) ..........................................................59 No. 61 Tolerance on Radiation Levels as Measured by the Four Copper Disc Radiometers in the Roof Test Apparatus. ........................................................................................................................................60
FTSG Resolutions 10/04/12 Page 2 of 92
No. 62 Fire Resistance Testing of Doorsets in Partitions Other Than Masonry . ...................................61 No. 63 Door Closer Forces .....................................................................................................................62 No. 64 Fire Resistance Assessments .....................................................................................................63 No. 64a FTSG Guidelines on Assessments of The Fire Resistance Performance .................................67 No. 66 Revision of 6.1.8 Relating to Time of Commencement of Heating Period ..................................71 No. 67 Proposed Addendum to BS 476: Part 21: 1987, Clause 7. .........................................................72 No. 68 Furnace Pressure Conditions - BS 476: Part 23: 1987 – Section 5.6.1. .....................................73 No. 69 Reporting of Indicative Reaction to Fire Tests ............................................................................74 No. 70 Fire Resistance Type Tests .........................................................................................................75 No. 71 Integrity Testing ...........................................................................................................................77 No. 72 A Cautionary Statement to be Added to Test Reports ................................................................78 No. 73 Use of Suffix Y .............................................................................................................................79 No. 74 Calibration Board Density ............................................................................................................80 No. 75 Wording to be used in temporary letters written in lieu of test reports. ......................................81 No. 76 Wording to be included in reports when client is unwilling to provide the required information ..82 No. 77 ‘Furnace Gassing’ during fire resistance tests .............................................................................83 No. 78 Testing of insulated door assemblies to BS 476: Part 22: 1987. ..................................................85 No. 79 Fire resistance testing of asymmetrical specimens from one direction .......................................86 No. 81 Preparation of BS 476: Part 7 1997 Test Specimens ..................................................................87 No. 82 Use of PFPF Guide to Undertaking assessments .......................................................................89 No. 83 Integrity failure via sustained flaming ..........................................................................................90 No. 84 Assessment of fire protection to structural steelwork ..................................................................91 No. 85 Interpretation of cotton pad application. ......................................................................................92
FTSG Resolutions 10/04/12 Page 3 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION
No. 1
No. 1 Moisture Content
STANDARD (S) TO WHICH APPLICABLE: BS 476: Part 8: 1972
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
WITHDRAWN 22-1-87
Resolution No. 33
Laboratories will take every reasonable precaution to ensure that tests are not conducted on any
construction or product which may include materials that are at an a typical moisture content. They
should inform clients of the limit of acceptability of a result which is achieved in a test where either
the precise moisture content is not known or when moisture equilibrium has not been achieved..
FTSG Resolutions 10/04/12 Page 4 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION No. 2
No. 2 Moisture Content Limits
STANDARD (S) TO WHICH APPLICABLE: BS 476: Part 8: 1972
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
WITHDRAWN 22-1-87
Resolution No 33
The Fire Test Study Group will decide upon or will accept advice, from knowledgeable bodies on,
equilibrium moisture contents for various materials and the appropriate procedures for their
determination. Acceptable equilibrium values of moisture content for timber were agreed to be within
the range 10%-14% w/w, and of concrete less than 6% w/w. Values for these and other materials will
be collated and tabulated.
FTSG Resolutions 10/04/12 Page 5 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION
No. 3
No. 3 Moisture Content
STANDARD (S) TO WHICH APPLICABLE: BS 476: Part 8: 1972
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
Ammended Sept 1984
WITHDRAWN 22-1-87
Resolution No 33
All laboratories will quote, in all fire resistance test reports, the measured moisture content of all
hygroscopic materials included within a test construction, together with a statement on the method by
which it was determined, and where appropriate the calculations used in obtaining the stated value.
When it is impracticable to determine a moisture content, eg of a door core material, then a statement
shall be made in the test report that the moisture content has not been measured.
FTSG Resolutions 10/04/12 Page 6 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION
No 4
No. 4 Measurement of moisture content of timber
STANDARD (S) TO WHICH APPLICABLE: BS 476: Part 8: 1972
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
WITHDRAWN 22-1-87
Resoloution No. 25 then by Resolution No. 33
The moisture content of timber or wood-based products shall be monitored using a moisture meter
with a two-pronged electrode and taking a sufficient number of readings to enable an average value
for a material to be obtained. An insulated shaft (hammer) electrode should be used to avoid
surface measurements..
FTSG Resolutions 10/04/12 Page 7 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION No
5
No. 5 Measurement of moisture content of masonry and concrete materials
STANDARD (S) TO WHICH APPLICABLE:
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
WITHDRAWN 22-1-87
Resoloution No 25 then Resolution No. 33
The moisture content of concrete and masonry materials may be monitored by use of a moisture
meter using the gel-bridge principle, or by use of geometrically representative drying specimens
kept within the construction during the drying period. Different thicknesses within a specimen may
require separate assessments of moisture content. Special attention is required where non-
uniformity of moisture distribution may require separate assessments of moisture distribution may
be experienced, eg metal decks.
FTSG Resolutions 10/04/12 Page 8 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION
No 6
No. 6 Conditioning of solvent or water based coatings
STANDARD (S) TO WHICH APPLICABLE:
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
WITHDRAWN 22-1-87
Resolution No 33
The condition of any solvent or water-based "applied coatings", eg sprayed insulation materials,
plaster coatings, intumescent coatings, shall be monitored by use of a sample tray of material.
Different thicknesses of material in a construction will require different drying samples..
FTSG Resolutions 10/04/12 Page 9 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION No
7
No. 7 Positioning of furnace thermocouples
STANDARD (S) TO WHICH APPLICABLE: BS 476: Part 8: 1972
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
WITHDRAWN 22.1.87
Resolution No 34
The 100 mm dimension referred to in clause 1.4.3 of BS 476: Part 8: 1972 shall be between the
thermocouple hot junction and the nearest point on the specimen in any direction. The distance shall be
kept nominally constant (50 mm-150 mm) throughout the test duration. For doors in walls the dimension
shall be from the nearest position on either the door or the wall, whichever is appropriate to the
predetermined position of the thermocouple within the furnace.
FTSG Resolutions 10/04/12 Page 10 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION
No 8
No. 8 Furnace Pressure
STANDARD (S) TO WHICH APPLICABLE: BS 476: Part 8: 1972
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
22.1.87
22.1.87
Still Valid
When testing elements to BS 476: Part 8: 1972, which are required to satisfy the integrity criterion, an
overpressure shall be maintained (after the first five minutes of test) at the top of a vertical test specimen,
or at the underside of a horizontal test specimen, the mean static value of which shall be:
h - 900 x 9
1000
Where h is the intended height (mm) above floor level, in practice of the top of a vertical test specimen or
the underside of a horizontal test specimen.
Note:
1. The above expression is based on a furnace pressure equal to ambient at a height of 900 mm,
and assumes a pressure gradient of 9 Pa per metre of height.
2. The above mean value should be controlled within an accuracy of ±2 Pa. At no time should the
pressure exceed 20 Pa.
FTSG Resolutions 10/04/12 Page 11 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION
No 9
No. 9 Furnace time temperature curve tolerances.
STANDARD (S) TO WHICH APPLICABLE: BS 476: Part 8: 1972
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
22.1.87
Still valid
When testing to BS 476: Part 8: 1972, the tolerances on areas referred to in clause 1.4.2 shall be
interpreted as follows:
0 - 10 minutes - tolerance 15%
10 - 30 minutes - tolerance 10%
30 - end of test - tolerance 5%
FTSG Resolutions 10/04/12 Page 12 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION No
10
No. 10 Furnace pressure when testing a suspended ceiling
STANDARD (S) TO WHICH APPLICABLE: BS 476: Part 8: 1972, Section 6
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
22.1.87
Still valid
When testing suspended ceilings to BS 476: Part 8: 1972, Section 6, the furnace pressure at the
exposed surface of the ceiling membrane level shall be equal to the pressure within the laboratory,
after the first five minutes of test..
FTSG Resolutions 10/04/12 Page 13 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION No
13
No.13 Insulation failure by virtue of integrity failure
STANDARD (S) TO WHICH APPLICABLE: BS 476: Part 8: 1972
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
22.1.87
Still valid
When testing to BS 476: Part 8: 1972, where insulation failure has not occurred previously,
insulation failure shall be deemed to occur simultaneously with an integrity failure..
FTSG Resolutions 10/04/12 Page 14 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION No
15
No. 15 Classification of fire resistance periods.
STANDARD (S) TO WHICH APPLICABLE: BS 476: Part 8: 1972
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
22.1.87
Still valid
When testing to BS 476: Part 8: 1972 results shall be expressed to the nearest minute, eg 29 minutes 15
STANDARD (S) TO WHICH APPLICABLE: BS 476 : Part 23 : 1987
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
11.10.89
23.02.90
FSM/1/6 Nov 1989
BSI Document No. 90/35289
BSI minute reference : 90/36421
Still valid
REASON :
In Section 5 of Part 23 - "Determination of the contribution of suspended ceilings to the fire
resistance of steel beams" - the wording of paragraph 5.6.1 ("Carry out the test in accordance with
BS 476: Part 20, with the exception of the furnace pressure conditions, .....") is being interpreted by
some parties to mean that the furnace pressure is not defined for the test.
RESOLUTION :
Tests carried out in accordance with Section 5 of BS 476: Part 23: 1987 shall be carried out with a
furnace pressure at equilibrium with the laboratory as described in paragraph 5.5.4 of Part 23.
FTSG Resolutions 10/04/12 Page 74 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION No
69
No. 69 Reporting of Indicative Reaction to Fire Tests
STANDARD (S) TO WHICH APPLICABLE: BS 476 : Part 4 : 1970
BS 476 : Part 5 : 1979
BS 476 : Part 6 : 1989
BS 476 : Part 7 : 1987
BS 476 : Part 11 : 1982
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
11.10.89
1.01.90
FSM/1/11 Nov 1989
BSI Document No. 90/35282
BSI minute reference 90/36413
Still valid
REASON :
Indicative tests are being used as a substitute for full test in supporting product performance with
respect to building regulation requirements or associated advisory material. In reporting results of
indicative tests, therefore, it is necessary to ensure that it is made clear that the test has not been
conducted fully in accordance with the requirements of the relevant Standard, nor under the
requirements of NAMAS accreditation.
RESOLUTION :
1. The report of an indicative test(s) (ie those which are not fully in accordance with the
requirements of the Standard because requirements, for example, relating to conditioning and/or
the number of specimens have not been satisfied) shall be such that it can be clearly differentiated
from a report on a full standard test.
2. Reporting should normally be by letter only, which should give the data relevant to the test result
but shall not interpret those results against any classification requirements.
3. The report shall bear the following statement:
"This (these) test results relate to an investigation which utilised the test methodology given in (the
relevant Standard): the full requirements of the Standard were not, however, complied with. The
information is provided for the test sponsor's information only and should not be used to
demonstrate performance against the Standard nor compliance with a regulatory requirement. The
test was not conducted under the requirements of NAMAS accreditation.
FTSG Resolutions 10/04/12 Page 75 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION No.
70
No. 70 Fire Resistance Type Tests
STANDARD (S) TO WHICH APPLICABLE: BS 476 : Parts 20-24 : 1987
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
11.10.89
24.02.90
FSM/1/6 Nov 1989
BSI Document No. 90/35289
BSI minute reference :90/36421
Still valid
REASON :
Test sponsors are sometimes unaware of the extent of usefulness of the fire resistance type test
which they are undertaking and this can sometimes lead to a misunderstanding between the
sponsor and the laboratory regarding the manner in which the test should be reported.
RESOLUTION :
Three types of fire resistance type test are identified, and the laboratory shall agree with the
sponsor prior to undertaking a test which type of test is required and report the results in
accordance with the following provisions:
1. Indicative Test - Reporting shall normally be by letter only, which should give the data
relevant to the test result but shall not interpret those results against any classification
requirements. A statement shall be included in the letter as follows:
"This (these) test results relate to an investigation which utilised the test methodology given
in (the relevant Standard); the full requirements of the Standard were not, however,
complied with. The information is provided for the test sponsor's information only and
should not be used to demonstrate performance against the Standard nor compliance with
a regulatory requirement.
The test was not conducted under the requirements of NAMAS accreditation."
2. Standard Test - The results of such a test would be the subject of a full report in
accordance with the provisions of the Standard. In a case where the sponsor fails to
achieve the required level of performance, he may agree to the results being presented in a
summarised form. In these cases the letter report shall bear the following statement:
"Whilst the test data accompanying this letter related to a test which was conducted fully in
accordance with (the relevant Standard), the presentation of the results in summarised
form by way of this letter does not satisfy the requirements of the Standard. The
presentation of the results in this way is by agreement with the sponsor who wishes to use
the information for his own internal use only."
FTSG Resolutions 10/04/12 Page 76 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION No.
70
In addition reference shall be made in the test data to the covering letter so that the test
data cannot be used in isolation.
3. Ad-hoc Test - A test which has been performed to a non-standard procedure, in the
absence of a Standardised procedure, but which utilises the principles of fire resistance
testing given in BS 476: Parts 20-23, eg tests on penetration seals, fire dampers, etc. The
reports of such tests shall bear the following statement:
"This report covers a test which was conducted to a procedure which is not the subject of any
British Standard specification, but the test utilised the general principles of fire resistance
testing given in BS 476: Parts 20-23. Since fire tests are the subject of a continuing
Standardisation process, and because existing standards are the subject of review and
possible amendment and new interpretations, it is recommended that the report be referred
back to the test laboratory after a period of two years to ensure that the methodology adopted
and the results obtained remain valid in the light of the situation prevailing at that time
FTSG Resolutions 10/04/12 Page 77 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION No
71
No. 71 Integrity Testing
STANDARD (S) TO WHICH APPLICABLE: BS 476 : Parts 20-23 : 1987
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
30.10.90
30.10.90
FSM/1/6 22.01.91
Still valid
REASON :
BS 476: Parts 20-23 are ambiguous on the measurement of integrity. In addition, a doorset has to
be categorised as an insulating, partially insulating or non-insulating doorset prior to testing. This
does not permit the category to be changed during the test, when, for example, the doorset fails
under the insulation criterion.
This resolution incorporates changes in procedures which allow a test to be conducted without the
need to categorise the door prior to test.
The following resolution is closer to integrity measurement as proposed in CEN documents N85
and N86.
RESOLUTION :
When conducting tests of separating elements in accordance with BS 476: Parts 20-23 : 1987 the
following procedures shall be adopted to determine integrity failure.
General
A failure to maintain integrity shall be deemed to have occurred when collapse or sustained flaming
on the unexposed face occurs or any of the criterion for impermeability is exceeded.
Impermeability
1. After the first 5 minutes the cotton pad shall be applied periodically any gap which existed
prior to the test or develops during heating subject to the limiting temperature in the vicinity
of the gap as given in BS 476: Part 20: 1987 Clause C.10.3.2.
2. From the start of the test the 25 mm gap gauge shall be applied to any existing or
developed gap.
3. From the start of the test the 6 mm gap gauge shall be applied to any existing or developed
gap.
Note: The 6 mm gap gauge shall not be applied to any existing or developed gap at the sill of a
doorset.
FTSG Resolutions 10/04/12 Page 78 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION No 72
No. 72 A Cautionary Statement to be Added to Test Reports
STANDARD (S) TO WHICH APPLICABLE: ALL
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
6.10.93
1.12.93
N/A
Still valid
REASON :
Since fire tests are the subject of a continuing standardisation process, and because existing
standards are the subject of review and possible amendment and new interpretations, it is
recommended that reports should be considered by the user to ensure that the methodology adopted
and the results obtained remain valid.
The objective of the review is to ensure that the market place remains equitable by preventing
manufacturers with very old or inadequate test reports from competing on equal terms with those who
have tested in accordance with later, possibly more onerous procedures.
RESOLUTION :
When reporting fire tests the conclusion or that section of the report, however, titled, which details
the test results, shall include the following statement:
"The specification and interpretation of fire test methods are the subject of ongoing development
and refinement. Changes in associated legislation may also occur. For these reasons it is
recommended that the relevance of test reports over 5 years old should be considered by the
user. The laboratory that issued the report will be able to offer, on behalf of the legal owner, a
review of the procedures adopted for a particular test to ensure that they are consistent with
current practices, and if required may endorse the test report".
FTSG Resolutions 10/04/12 Page 79 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION No
73
No. 73 Use of Suffix Y
STANDARD (S) TO WHICH APPLICABLE: BS 476 : Part 7 : 1987
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
: 30.10.90
: 10.04.91
: FSM 1/11 22.01.91
: BSI Document No.: 91/36892
: BSI minute reference : 91/385721
Withdrawn on publication of BS 476:Part 7:1997
REASON :
There has been some confusion over the use of the suffix Y when classifying materials to BS 476:
Part 7: 1987. The relevant clause states that "a suffix Y shall be added to the classification if any
softening and/or other behaviour that may affect the flame spread occurs".
Taken literally, this clause could mean that the suffix Y is applied to all materials whose facings
char and curl or fall away or explode outwards and many more such examples which were not
intended to be classified in this manner.
RESOLUTION :
Amendment to Clause 10.5.
Delete the clause and substitute:
"A suffix Y shall be added to the classification if any of the following behaviour is observed:"
a) A material distorts (eg, curls away at the hot end) during testing so that it significantly
shields areas of the specimen from the irradiance from the furnace.
b) Where the specimen does not remain in position for the whole 10 minute duration of the
test due to softening or slumping.
Note: Buckling of the test specimen does not necessarily result in the addition of a Y suffix
since this may result in more severe conditions for the specimen.
c) Where delamination occurs such that the flaming portion of the specimen falls away thus
preventing further flame spread.
d) Where thin materials shrink back onto the substrate but do not fall away.
FTSG Resolutions 10/04/12 Page 80 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION No
74
No. 74 Calibration Board Density
STANDARD (S) TO WHICH APPLICABLE: BS 476 : Part 7 : 1987 as amended by AMD 6249
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
30-10-90
17–06-91 ammended 18-06-91
FSM /1/11 22-01-91
Withdrawn on publication of BS 476:Part 7:1997
REASON :
The Standard as it is written including amendment 6249 published and effective from 31st January
1990 specifies a calibration board density that is now unobtainable.
RESOLUTION :
Amendment to Clause 6.4.1.
In line 3, delete "850 ± 100 kg/m³" and substitute "950 ± 100 kg/m³".
FTSG Resolutions 10/04/12 Page 81 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION No
75
No. 75 wording to be used in temporary letters written in lieu of test reports.
STANDARD (S) TO WHICH APPLICABLE: N/A
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
31-1-95
31–1-95
N/A
Still Valid
REASON:
Due to the fact that a written confirmation of results is urgently required by a third party, many
laboratories write temporary letters detailing results of fire resistance tests to satisfy the client until the
full test report is available.
However, the lack of a period of validity or cut-off date in such 'letters of comfort' has led to abuses of
the system whereby clients use the letter for building control purposes instead of the full test report -
often long after the test report has been delivered.
In order to prevent this it is essential that only full test reports are used for building control purposes or
at least that these temporary letters have a period of validity which will expire in the short term. A
period of one month is suggested after which the full report must be consulted. If the report is not
ready after a month - the laboratory can simply issue another letter - again with a one month cut-off
date.
RESOLUTION:
When writing temporary letters in lieu of fire test reports the following wording shall be included:-
i) At the beginning of the letter:- "This letter confirms that a fire test to (test standard) was
conducted on your (specimen) on (date of test) and that a preliminary assessment of the results
indicates that the specimen achieved for example (Load bearing capacity X minutes, Integrity Y
minutes, Insulation Z minutes*)." *delete as appropriate
ii) Just before the signatures:- "Full details of the test and the test construction will be found in our
report reference (report ref), in course of preparation. Once that report is issued, this letter will cease
to apply. These preliminary results are for your information only. The fully authorised results will follow
in the above referenced report."
This letter is valid for a period of one month only from the date of issue.
Date issued: (date of letter)"
FTSG Resolutions 10/04/12 Page 82 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION No
76
No. 76 wording to be included in reports when the client is unwilling to provide the required information
STANDARD (S) TO WHICH APPLICABLE: N/A
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
25-1-96
N/A
Still Valid
A resolution to introduce a standardised wording in reports for when the client is unwilling or unable,
for whatever reason, to provide the necessary information required to complete the test report.
Reason:
For many reasons clients are often unable or unwilling to give all the necessary information for the
laboratory to adequately write the test report. Sometimes this is because the client is genuinely unable
to provide the information, e.g. because he is testing specimens taken from site. However, more often
than not it is due to reticence on his part to provide the necessary information. This leads to delays in
the production of reports which can be inconvenient for the laboratory.
Resolution:
If when writing reports the sponsor is unable or unwilling to give all the necessary information for the
laboratory to adequately write the test report then the laboratory shall include the following wording
prominently positioned after the description of the specimen:
"The sponsor was unwilling to provide the information required to adequately describe the
specimen(s). It should be noted that not all of the information required by the Standard has been
included and the report does not, therefore, comply with the requirements of the Standard".
Where the client is genuinely unable to provide the information as in the example given above, then
the statement above must still be included, but may be modified if necessary by replacing "unwilling"
with "unable".
All attempts must be made to obtain the information from the client and the above procedure
must not be used as an excuse for not attempting to include the relevant information in
reports.
FTSG Resolutions 10/04/12 Page 83 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION No
77
No. 77 ‘Furnace Gassing’ during fire resistance tests
STANDARD (S) TO WHICH APPLICABLE: BS 476 Parts 21, 22 & 23
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
22/4/99
22/4/99
FSH 22 2/2/00
Still Valid
INTRODUCTION
During some fire resistance tests on largely non-combustible specimens, usually for durations in
excess of two hours, a phenomenon is sometimes observed of small translucent flames escaping
from around points of leakage of the specimen. Such flaming is caused by unburnt ‘rich’ furnace
gasses flaming on the unexposed face as a result of the increased oxygen content outside the
furnace. However, under section 10.3.1 of BS 476: Part 20 sustained flaming (as defined in section
2.12) is regarded as a failure of integrity of the construction.
These constructions should not be failed by continuous flaming since this ‘leakage’ would have been
present at the start of the test because of the nature of the construction, but would not visible due to
the different furnace conditions that existed at that time. Examples of such constructions are rolling
shutters and lift landing doors. The point at which the ‘flaming’ becomes visible depends on the
settings of the furnace, not the ’leakiness’ of the specimen and it is not the intention of the standard
that the furnace characteristics should determine whether or not a construction should fail, especially
since different furnaces are susceptible to the effect in different ways.
These constructions cannot be evaluated using the cotton pad because the constructions are either
uninsulating or failed insulation some time ago. They cannot be deemed to have failed imperviousness
either because although there is undoubtedly a leakage of hot gasses, the shape of the specimen (e.g.
rebated meeting stile on a metal doorset) means that the gap gauges cannot be utilized to fail the
construction.
REASON:
The reason that a resolution is required is that different laboratories are interpreting the effect in
different ways. Some fail the construction, whilst others evaluate the phenomenon as a result of the
richness of the gasses used to fire the furnace and ignore it.
RESOLUTION:
When evaluating separating elements for integrity by means of continuous flaming (section 10.3.1)
the laboratory shall consider the influence of ‘furnace gassing’ on the result. If, in the opinion of the
laboratory, the observed flaming is caused by unburnt ‘rich’ furnace gasses flaming on the unexposed
face as a result of the increased oxygen content outside the furnace, then it shall be ignored for
evaluating complince with the integrity criterion.
FTSG Resolutions 10/04/12 Page 84 of 92
LOWER
PRESSURE
OPINION OF
LABORATORY
N
CONTINUOUS
FLAME
PRESENT ?
Y
CONTINUE
TEST
Y
CONTINUOUS
FLAME
VISIBLE ?
N
Y
COMBUSTIBLE
CONTENT ?
CONTINUOUS
FLAME
VISIBLE ?
FAIL PASS
N
FAIL
LOWER
PRESSURE
Y
NCONTINUOUS
FLAME
VISIBLE ?
CONTINUE
TEST
NSTART
Y
FTSG Resolutions 10/04/12 Page 85 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION No
78
No. 78 Testing of insulated door assemblies to BS 476: Part 22: 1987.
STANDARD (S) TO WHICH APPLICABLE: BS 476 : Part 22
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
: 25-2-97
: 24-11-97
: FSH/22/5 24-11-97
Still Valid
REASON :
There are inconsistencies in testing resulting from a lack of clarification as to which section of BS 476
Part 22: 1987 is being used when carrying out tests on insulated door assemblies.
There are also inconsistencies in interpretation as to which components and/or areas of a door
assembly can be excluded in the 20% of the area that is not evaluated with respect to the insulation
criteria when testing to BS 476: Part 22: Section 7.
RESOLUTION :
When testing door assemblies to BS 476: Part 22: 1987, the sponsor shall agree with the laboratory
which section of the standard is to be used when conducting the test. Alternatively, sufficient
instrumentation shall be provided by the laboratory so that an insulated door assembly can be
evaluated as partially insulating or uninsulating and a partially insulated door assembly can be
evaluated as uninsulating.
When testing partially insulated door assemblies to BS 476: Part 22: 1987: Section 7, the door frame
shall not be included in the 20% of the total area of the door that is not evaluated with respect to the
insulation criteria, i.e. the temperature of the door frame shall be used in the evaluation of partially
door assemblies against the insulation criteria.
NOTE: The note to 7.6.1.1 allowing 20% of the area of the specimen not to be evaluated with respect
to insulation is followed by section 7.6.1.3 which calls up the thermocouples mounted on the door
frame to be used in the evaluation of partially insulated door assemblies with respect to the insulation
criteria.
FTSG Resolutions 10/04/12 Page 86 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION No
79
No. 79 - Fire resistance testing of asymmetrical specimens from one direction
STANDARD (S) TO WHICH APPLICABLE: BS
476: Part 22 or EN 1634-1.
ire resistance tests on timber and elements
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
25-2-97
24-11-97
BSI : 24-11-97
ammended 23/3/01
Still Valid
REASON :
There are inconsistencies in the applicability of results of tests carried out in one direction on
asymmetrical specimens that are required to resist fire from both sides. BS 476: Part 20 : 1987 -
amongst others - allows this if the ‘reason’ for choosing the more onerous direction is given in the
report. There are several problems with this approach:
1. The British Standard allows for a result on one direction to apply to another direction if the
‘reason’ is given in the test report. Such a ‘reason’ is in fact an opinion and therefore is not
permitted to be in a report of a test according to UKAS rules.
2. The worst direction of test for one criterion may not be the worst direction for another criterion.
Different end-users place different emphasis on different criteria.
RESOLUTION :
When testing single asymmetrical separating elements for fire resistance:
1. The test report will state that the result is only applicable to the tested direction, unless there is
a field of direct application associated with the test method which determines that the result is
also applicable to another direction. In such cases, the statement that the results are
applicable to another direction shall be contained in a field of direct application section of the
report.
2. If the sponsor requests that the result be applied to the direction not tested, or not covered by
any direct field of application, then that may only be satisfied by the preparation of an
assessment by the laboratory in accordance with Resolution 82.
3. Any assessment such as that defined in 2 above shall be separate from the main body of the
report, but may be included in one overall document for convenience.
FTSG Resolutions 10/04/12 Page 87 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION No
81
No. 81 - Preparation of BS 476: Part 7 1997 Test Specimens
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
22 April 1999
22 April 1999
2 February 2000 (BSI committee FSH 21)
Still Valid
REASON :
A wall lining product classified as Class 1 has been involved in a fire and has contributed to the
spread of the fire. The product had a directional surface irregularity that led to a Class 1
classification in one orientation and a Class 4 classification in the other orientation. This directional
feature of the exposed surface had not been identified by the testing laboratory.
Whilst BS 476:Part 7 identifies the need to evaluate exposed surface irregularities that are directional
it is not always obvious to laboratory staff when such an irregularity exists and consequently a more
formalised approach is required.
RESOLUTION :
This resolution applies to all products. When preparing a set of six test specimens from a supplied
product, three specimens shall be taken from each orientation of the exposed surface as shown
below.
x direction
y direction
The test should then be conducted in accordance with BS 476:Part 7:1997 and the test report should
clearly indicate the orientation of the individual specimens with reference to the supplied product.
If no difference in performance is observed between the two sets of three specimens, i.e. they all lie
within the same classification band, then the product can be classified based on the six specimens
tested.
If a difference in performance between the two sets of three specimens exists then an additional three
specimens should be prepared from the direction yielding the class of the poorest performance
FTSG Resolutions 10/04/12 Page 88 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION No
81
(greatest flame spread). The classification of the exposed surface in this instance should be based on
the six samples taken from the same orientation.
Note: Sufficient material should be supplied for a further set of three specimens to be cut in either
direction.
FTSG Resolutions 10/04/12 Page 89 of 92
FIRE TEST STUDY GROUP (UK) RESOLUTION No 82
No. 82 - Use of PFPF Guide to Undertaking assessments
FTSG PROGRESSION DATES:
Agreed by Executive
Implemented
Outside bodies notified (if applicable)
Reaffirmed (if applicable)
Superseded/withdrawn
Superseded by (if applicable)
: 5-12-00
: 2-01-01
:
:
: Still Valid
:
REASON :
FTSG has invested considerable effort in developing and promoting the FTSG code on undertaking
assessments. This documents has been taken on board by the Passive Fire Protection Federation
and with only minor modifications has been endorsed as the way to undertake assessments in lieu of
fire tests.
The guide supersedes resolution 64a 1993 and should be the definitive document used for
undertaking assessments by FTSG members.
RESOLUTION :
When undertaking assessments, FTSG members agree to follow the PFPF guide to undertaking
assessments in lieu of fire tests as the document to control the production of assessments in their
organisation.
Reference must be made to the use of the guide in all assessments.
Resolution 64a: 1993 is withdrawn.
FTSG Resolutions 10/04/12 Page 90 of 92
FIRE TEST STUDY GROUP (UK) Resolution No. 83 No. 83 - Integrity failure via sustained flaming
FTSG PROGRESSION DATES:
Agreed by Executive Implemented Outside bodies notified (if applicable) Reaffirmed (if applicable) Superseded/withdrawn Superseded by (if applicable)
: 24-10-01 : 1-11-01 : : : :
TITLE: Integrity failure via sustained flaming
REASON : When evaluating a test specimen for integrity failure via sustained flaming, it is sometimes difficult to determine what constitutes the unexposed face. In some cases it can be a highly irregular surface with flaming in small cracks and fissures e.g. flaming within a narrow joint between two panels of a partition. In other cases the flaming may come from components which were not originally part of the unexposed face, but which have been revealed during the test. An examples of this is a double glazed unit comprising fire resistant glass on the exposed face and normal float glass on the unexposed face, where the unexposed face glass breaks and falls out revealing flaming components surrounding the fire resistant glass.
In cases such as these, the laboratory has to decide what constitutes the unexposed face and whether this may change as the test progresses. This resolution has been agreed In order to remove any inconsistencies between laboratories in defining what constitutes the unexposed face of the test specimen.
RESOLUTION : When conducting a fire resistance test, sustained flaming from the specimen should only be deemed as an integrity failure if it occurs on the unexposed face of the specimen. For this purposes, the unexposed face is any area which could be evaluated during the test using the roving thermocouple.
Consequently, if the flaming is contained within a gap in an element and one was not able to apply the roving thermocouple into that gap e.g. because it was too narrow, then this does not constitute failure and the flaming within that gap is ignored.
FTSG Resolutions 10/04/12 Page 91 of 92
FIRE TEST STUDY GROUP (UK) Resolution No. 84 No. 84 - Assessment of fire protection to structural steelwork
FTSG PROGRESSION DATES:
Agreed by Executive Implemented Outside bodies notified (if applicable) Reaffirmed (if applicable) Superseded/withdrawn Superseded by (if applicable)
: 15-05-03 : 15-05-03 : ASFP : : :
TITLE:
Assessment of the Fire Resistance Performance of materials used to protect structural steelwork
REASON : There is a need to ensure and demonstrate that FTSG members are all using the same principles when undertaking appraisals of materials used to protect structural steelwork.
RESOLUTION :
When undertaking an appraisal of a material, product or system used to protect structural steelwork, the results of any assessment made of the ability for any fire protection product to enhance the fire resistance performance of structural steel shall respect the following principles: I. the ‘stickability’ of the product shall be justified for the maximum period of fire
resistance claimed. No fire resistance performance shall be assessed if the product has not been proven to be able to stay on a stressed and deflecting beam or column for the maximum fire resistance period,
II. the scope of assessment of product thicknesses, steel section sizes and types, and the fire
protection periods shall not be significantly extrapolated beyond the range of the input data for these variables,
III. all the available test data shall be used in support of the analysis of the product performance
and selected data shall not been excluded without appropriate and reasonable justification, and IV. from a comparison of the predicted times and thicknesses for given steel section factors with
the times actually obtained in test, the analysis shall provide a reliable but conservative prediction of the test results from which it is derived.
FTSG Resolutions 10/04/12 Page 92 of 92
FIRE TEST STUDY GROUP (UK) Resolution No. 85 No. 85 - Interpretation of cotton pad application.
FTSG PROGRESSION DATES:
Agreed by Executive Implemented Outside bodies notified (if applicable) Reaffirmed (if applicable) Superseded/withdrawn Superseded by (if applicable)
: 15-5-03 : 15-5-03 : BSI FSH 22 28-5-03 :
TITLE: FTSG Interpretation of cotton pad application.
REASON:
The use of the cotton pad test, as defined in clause 10.4.5.2 of BSEN 1363-1: 1999 is ambiguous. The clause does not clearly define whether the cotton pad should be applied to surfaces where no crack or gap is present, in addition to cracks or gaps where hot gasses are passing through the specimen. This becomes an issue when radiation levels from uninsulated surfaces, especially uninsulated glazing, are sufficient to ignite a cotton pad, without the presence of cracks or gaps. Concern has been raised regarding the possibility of igniting combustible components of the specimen, adjacent to the cotton pad, on the unexposed face of the specimen, as failures due to glowing or flaming of the cotton pad are subsequently discounted for classification of non-insulating elements, under the rules of the classification standard (prEN 13501-2: May 2002).
RESOLUTION: The cotton pad shall be applied throughout the test, to all surfaces, regardless of whether or not cracks or gaps are present. Care should be taken to avoid, if possible, igniting combustible components on the unexposed face of the specimen adjacent to the cotton pad, due to flaming of the pad. The pad shall therefore be positioned to reduce this possibility, providing the area where the pad is applied has a similar surface temperature to those areas where the combustible materials are located. For instance, positioning the pad in a lower area of a glazed panel to reduce the risk of igniting the beading at the head by rising flames from the pad. However, if there are any cracks, gaps, or hot-spots in the higher area of the glazed panel, the pad shall be applied to these areas. The pad should be removed immediately once glowing or flaming of the pad occurs. When there is any doubt of whether the cotton pad would or would not glow/ignite, the pad shall be applied at least in the final minute prior to each classification duration stated in the classification standard.