ENV 13381-7:2002

SLOVENSKI STANDARD
01-januar-2003
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Test methods for determining the contribution to the fire resistance of structural members
- Part 7: Applied protection to timber members
Prüfverfahren zur Bestimmung des Beitrages zum Feuerwiderstand von tragenden
Bauteilen - Teil 7: Brandschutzmaßnahmen für Holzbauteile
Méthodes d'essai pour déterminer le contribution a la résistance au feu des éléments de
construction - Partie 7: Protection appliquée aux éléments en bois
Ta slovenski standard je istoveten z: ENV 13381-7:2002
ICS:
13.220.50 Požarna odpornost Fire-resistance of building
gradbenih materialov in materials and elements
elementov
91.080.20 Lesene konstrukcije Timber structures
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN PRESTANDARD
ENV 13381-7
PRÉNORME EUROPÉENNE
EUROPÄISCHE VORNORM
July 2002
ICS 13.220.50
English version
Test methods for determining the contribution to the fire
resistance of structural members - Part 7: Applied protection to
timber members
This European Prestandard (ENV) was approved by CEN on 1 March 2002 as a prospective standard for provisional application.
The period of validity of this ENV is limited initially to three years. After two years the members of CEN will be requested to submit their
comments, particularly on the question whether the ENV can be converted into a European Standard.
CEN members are required to announce the existence of this ENV in the same way as for an EN and to make the ENV available promptly
at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the ENV) until the final
decision about the possible conversion of the ENV into an EN is reached.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. ENV 13381-7:2002 E
worldwide for CEN national Members.

Contents
page
Foreword. 3
1 Scope . 4
2 Normative references. 5
3 Terms and definitions, symbols and units . 5
4 Test equipment . 7
5 Test conditions. 7
6 Test specimens. 8
7 Installation of the test construction. 12
8 Conditioning of the test construction. 12
9 Application of instrumentation. 13
10 Test procedure . 14
11 Test results. 15
12 Test report. 16
13 Assessment . 16
14 Report of the assessment . 18
15 Limits of applicability of the results of the assessment. 18
Annex A (normative) Test method to the smouldering fire or slow heating curve. 23
Annex B (informative) Guidelines for fire protection of timber structures according to
ENV 1995-1-2 - Loadbearing function. 26
Annex C (normative) Measurement of properties of fire protection materials . 29
Annex D (informative) Alternative construction for loaded beam test specimen . 32
Bibliography . 34
Foreword
This document ENV 13381-7:2002 has been prepared by Technical Committee CEN/TC127 "Fire safety in buildings", the
secretariat of which is held by BSI.
This document has been prepared under the mandate given to CEN/TC127 by the Commission and the European Free Trade
Association.
As there was little experience in carrying out these tests in Europe CEN/TC127 agreed that more experience should be built
up during a prestandardization period before agreeing text as European Standards. Consequently all parts are being prepared
as European Prestandards.
This European Prestandard is one of a series of standards for evaluating the contribution to the fire resistance of structural
members by applied fire protection materials. Other parts of this ENV are:
Part 1: Horizontal protective membranes.
Part 2: Vertical protective membranes.
Part 3: Applied protection to concrete members.
Part 4: Applied protection to steel members.
Part 5: Applied protection to concrete/profiled sheet steel composite members.
Part 6: Applied protection to concrete filled hollow steel columns.
Annexes A and C are normative. Annexes B and D are informative.
Caution
The attention of all persons concerned with managing and carrying out this fire resistance test, is drawn to fact that fire testing
can be hazardous and that there is a possibility that toxic and/or harmful smoke and gases can be evolved during the test.
Mechanical and operational hazards can also arise during the construction of test elements or structures, their testing and the
disposal of test residues.
An assessment of all potential hazards and risks to health should be made and safety precautions should be identified and
provided. Written safety instructions should be issued. Appropriate training should be given to relevant personnel. Laboratory
personnel should ensure that they follow written safety instructions at all times.
The specific health and safety instructions contained within this prestandard should be followed.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are
bound to announce this European Prestandard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany,
Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the
United Kingdom.
1Scope
This Part of this European Prestandard specifies a test method to be followed for determining the contribution of
fire protection systems to the fire resistance of structural timber members.
Such fire protection systems include claddings, sprayed fire protection and coatings.
The method is applicable to all fire protection systems used for the protection of timber members. These can be fixed
directly, totally or in part, to the timber member and can include an air gap between the fire protection system and
the timber member, as an integral part of its design.
Evaluation of timber constructions protected by horizontal or vertical protective membranes are the subject of ENV
13381-1 or ENV 13381-2 respectively.
The test method is applicable to the determination of the contribution of fire protection systems to the fire resistance
of loadbearing timber structural members and non-loadbearing parts of the works, including floors, roofs, walls,
beams and columns. It is also applicable to timber structural members incorporating insulating materials between
the timber members, e.g. between timber joists in floor constructions.
The test method and its assessment procedure is designed to permit direct application of the results to cover a range
of thicknesses of the applied fire protection material.
This European Prestandard contains the fire test which specifies the test to be carried out to determine the ability
of the fire protection system to delay the temperature rise throughout the timber member, to determine the ability
of the fire protection system to remain coherent and fixed to the timber member and to provide data of the
temperature profile throughout the timber test member, when exposed to the standard temperature/time curve
according to the procedures defined herein.
In special circumstances, where specified in national building regulations, there can be a need to subject reactive
protection material to a smouldering curve. The test for this and the special circumstances for its use are detailed
in annex A.
The fire test methodology makes provision for the collection and presentation of data which can be used as direct
input to the calculation of fire resistance of timber members in accordance with the procedures given in
ENV 1995-1-2.
A description of the relationship of this test method and the assessment of the results obtained therefrom to
ENV 1995-1-2 and guidelines for the use of this test method in accordance with that standard are given in annex B.
This European Prestandard also contains the assessment which prescribes how the analysis of the test data should
be made and gives guidance to the procedures by which interpolation should be undertaken.
The limits of applicability of the results of the assessment arising from the fire test are defined, together with
permitted direct application of the results to different timber constructions over the range of thicknesses of the
applied fire protection system tested.
2 Normative references
This European Prestandard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated
references, subsequent amendments to or revisions of any of these publications apply to this European Prestandard
only when incorporated in it by amendment or revision. For undated references the latest edition of the publication
referred to applies (including amendments).
EN 1363-1 Fire resistance tests - Part 1: General requirements.
EN 1363-2 Fire resistance tests - Part 2: Alternative and additional procedures.
EN 1365-1 Fire resistance tests for loadbearing elements - Part 1: Walls.
EN 1365-2 Fire resistance tests for loadbearing elements - Part 2: Floors and roofs.
EN 1365-3 Fire resistance tests for loadbearing elements - Part 3: Beams.
EN 1365-4 Fire resistance tests for loadbearing elements - Part 4: Columns.
ENV 1995-1-2 Eurocode 5: Design of timber structures
Part 1-2: General rules - Structural fire design.
EN 338 Structural timber - Strength classes.
EN 312 Particleboards - Specifications.
ISO 8421-2 Fire protection -Vocabulary - Part 2: Structural fire protection.
ISO 13943 Fire safety - Vocabulary (ISO 13943:1999).
3 Terms and definitions, symbols and units
3.1 Terms and definitions
For the purposes of this European Prestandard, the terms and definitions given in EN 1363-1, EN ISO 13943 and ISO 8421-2,
together with the following, apply.
3.1.1
timber structural member
element of building construction which may be loadbearing or non-loadbearing and which is mainly constructed from solid
timber and/or other wood based products
3.1.2
fire protection material
material or combination of materials applied to the surface of a timber structural member for the purpose of increasing its fire
resistance
3.1.3
passive fire protection materials
materials which do not change their physical form upon heating, provide fire protection by virtue of their physical or thermal
properties. They may include materials containing water which, on heating, is removed to produce cooling effects
3.1.4
reactive fire protection materials
materials which are specifically formulated to provide a chemical reaction upon heating such that their physical form changes
and in so doing provide fire protection by thermal insulative and cooling effects
3.1.5
fire protection system
fire protection material together with a prescribed method of attachment to a timber structural member. The fire protection
system may include multiple layers of materials and multiple combinations of materials
3.1.6
fire protection
protection afforded to the timber member by the fire protection system such that the rise of temperature of the timber and
fixings is limited or delayed throughout the period of exposure to fire
3.1.7
test specimen
complete assembly of the timber test member plus the fire protection system under test. Within this test method, several timber
beams representative of timber in various constructional environments in a structural building member, may be combined into
a single test specimen
3.1.8
stickability
ability of a fire protection material to remain sufficiently coherent and in position for a well defined range of deformations,
and furnace and test specimen surface temperatures, such that its ability to provide fire protection is not significantly impaired
3.1.9
charring depth
distance from the original surface of the timber member to the char line. The char line is the border-line between char layer
and the residual cross section
3.2 Symbols and units
Symbol Unit Designation.
t min Time.
t min The failure time of the fire protection system, i.e. the time when the temperature
pr
on the surface of the timber test member (interface between timber and fire
protection or air gap beneath the fire protection) reaches 300 °C.
t min Time at which the temperature indicated by a thermocouple placed at the
300,prot
interface between the timber test member and the fire protection system, or at
a specified point within a protected timber test member, reaches 300 °C.
t min Time at which the temperature indicated by a thermocouple on the surface of
300,unprot
an unprotected timber test member, or at a specified point within an
unprotected timber test member, reaches 300 °C.
t min Time of termination of test.
test
d mm Thickness of the fire protection system. In the case of two or more layers of fire
p
protection material d is the sum of the thicknesses.
p
d mm Charring depth.
char

mm/min Notional charring rate from ENV 1995-1-2 excluding the effect of roundings
at arrises.

mm/min Notional charring rate from ENV 1995-1-2 including the effect of roundings at
o
arrises.

´ mm/min Actual unprotected charring rate determined by testing.
߆mm/min Actual protected charring rate determined by testing.
4 Test equipment
4.1 General
The furnace and test equipment shall be as specified in EN 1363-1.
4.2 Furnace
The furnace shall be designed to permit the dimensions of the test specimen to be exposed to heating to be as
specified in 6.2 and its installation to be as specified in clause 7.
4.3 Loading equipment
Loading equipment shall conform to that specified in EN 1363-1. The loading system shall permit loading of the
magnitude defined in 5.3 to be applied.
5 Test conditions
5.1 General
The tests shall be carried out as described in EN 1363-1 unless otherwise stated.
For a fire protection system to be applied to timber floors, walls, beams and columns, both floor and beam tests shall
be performed according to EN 1365-2 and EN 1365-3 respectively.
For a fire protection system to be applied only to timber floors and walls, then floor tests shall be performed
according to EN 1365-2.
For a fire protection system to be applied only to timber beams and columns, then beam tests shall be performed
according to EN 1365-3.
This test method is written in terms of this universal application to all constructions.
Wall or column tests only may be performed (according to EN 1365-1 or EN 1365-4 respectively) but the results
shall be restricted to that tested.
The EN 1365 test methods shall be slightly modified for the purposes of this test in order that the following
information may be obtained and monitored:
- the behaviour of the fire protection system and its stickability;
- the temperature of the timber behind the fire protection system and the temperature throughout the depth
of the timber.
5.1.1 The modified prEN 1365 large scale test
The EN 1365 test method(s) and test specimen(s) appropriate to the use of the fire protection material, specified by
the sponsor, shall be followed.
The temperature performance, stickability and general behaviour of the fire protection system, under load shall be
examined by incorporation into the test specimen an assembly or assemblies comprising particleboard laminate
together with additional instrumentation.
5.1.2 The small scale test
Small scale tests shall be performed upon scaled down test assemblies from that given in 5.1.1.
Small scale tests shall be carried out on the same furnace as that used for the large scale tests in 5.1.1 and in
horizontal orientation, unless the result is to be restricted (see 5.1).
Such tests shall be used to give correlation between protected and unprotected timber structures and to provide
additional information.
5.2 Support and restraint conditions
Test specimens shall be supported according to the relevant large scale test.
5.3 Loading conditions
Loading shall be applied to full size test specimens according to the relevant large scale test.
The magnitude of the load shall be calculated, taking account of the differing strength and deformation properties
induced by included particle board laminates, to be that required to give the necessary deflection according to the
appropriate EN 1365 test.
The small scale test shall be performed unloaded.
6 Test specimens
6.1 Number
6.1.1 General
The appropriate test or tests to be carried out shall be as given in 5.1. For each EN 1365 test method to be used, if
the fire protection material is available in more than one thickness then following shall be carried out:
a) Test result to be applicable to floors and beams according to EN 1365-2 and EN 1365-3 (and therefore to
walls and columns according to 5.1).
- one large floor test at minimum thickness
- one large floor test at maximum thickness
- one large beam test at minimum thickness
- one large beam test at maximum thickness
- one small floor test at minimum thickness
- one small floor test at maximum thickness
- one unprotected small scale test.
b) Test result to be applicable only to floors according to EN 1365-2 (and therefore to walls according to 5.1).
- one large floor test at minimum thickness
- one large floor test at maximum thickness
- one small floor test at minimum thickness
- one small floor test at maximum thickness
- one unprotected small scale test.
c) Test result to be applicable only to beams according to EN 1365-3 (and therefore to columns according to
5.1).
- one large beam test at minimum thickness
- one large beam test at maximum thickness
- one small floor test at minimum thickness
- one small floor test at maximum thickness
- one unprotected small scale test.
For very restricted application to walls or columns (see 5.1) the same numbers of tests shall be carried out with walls
or columns replacing floors or beams.
For each EN 1365 test method to be used, if the fire protection material is available in one thickness or if the sponsor
specifies limitation to one commercially appropriate thickness only, then the two tests at maximum and minimum
thickness shall be replaced by a single test at that thickness. The results of the assessment shall be restricted to that
tested.
Test constructions carrying particleboard test specimens shall be built according to 6.3 and installed according to
clause 7.
6.1.2 Fire protection system variations
Additional particleboard test specimens shall be tested to provide further test data for the fire protection system when
it is required to consider:
- different construction and fixing variables: One particleboard specimen per variable shall be tested in both
large and small scale tests at maximum fire protection thickness;
- multilayer fire protection systems: One particleboard specimen per variable shall be tested in both large and
small scale tests;
- other intermediate fire protection thicknesses between maximum and minimum thickness. One small scale
test per thickness variable to be considered;
- alternative and intermediate thicknesses of multiple layer combinations. One small scale test per
combination and combination thickness to be considered;
- the test to the smouldering curve (see annex A). One small scale test for maximum and minimum thickness
tested on the large scale.
Test constructions carrying particleboard test specimens shall be built according to 6.3
The additional particleboard specimens given in 6.1.2 may be incorporated into the tests defined in 6.1.1 or tested
separately, providing the requirements of clause 7 are satisfied.
6.2 Size
6.2.1 Large scale test specimen
For each EN 1365 test method to be carried out, as given in 5.1, the size of the large scale test construction to carry
the particleboard test specimen shall be that specified in that method, i.e.:
- Floors: the exposed dimensions of the floor shall be at least 4 000 mm length and 2 000 mm width according
to EN 1365-2.
- Beams: the exposed length of the beam shall be at least 4 000 mm according to EN 1365-3.
- Walls: the exposed dimensions of the wall shall be as specified in EN 1365-1.
- Columns: the exposed height of the column shall be as specified in EN 1365-4.
6.2.2 Small scale test specimen
The size of the small floor test construction to carry the particleboard test specimen shall be such that its exposed
length is 2 000 mm and its exposed width 1 000 mm.
6.3 Construction
6.3.1 Construction of timber test specimens
The test constructions to carry the particleboard laminate test specimens shall be made according to the EN 1365
test(s) under consideration.
6.3.1.1 Particle board laminate test specimens
Loaded large floor - A particle board laminate, comprising 10 layers of 10 mm thick particleboard, of width equal
to the spacing between the floor joists and length equal to the exposed length of the floor, is rigidly fixed between
and to the joists such that the deflection applied to the floor is transferred to the particleboard. This fixing is made
from above by use of appropriate brackets or fixings. The lower face of the particleboard laminate shall be flush with
the lower face of the joists.
Thermocouples shall be inserted between the layers as defined in 9.3.
Depending upon the width of the floor, the spacing of the joists etc, more than one particleboard test specimen may
be incorporated into a test floor to permit more than one variable to be examined per furnace test, providing the
limitations of 6.1.2 and clause 7 are followed. Multiple specimens shall be symmetrically distributed.
Loaded beams - The beam is covered with particleboard laminate, comprising 5 layers of 10 mm thick
particleboard, applied round the beam on all exposed sides. The particleboard laminate is rigidly fixed to the beam
such that the deflection applied to the beam is transferred to the particleboard.
Thermocouples shall be inserted between the layers as defined in 9.3.
An alternative construction for loaded beam testing is given in annex D.
6.3.1.2 Small scale tests
Unloaded floor test specimens: shall comprise particleboard laminates made up from 10 layers of 10 mm thick
particleboard, adhesive laminated, size 2000 mm · 1000 mm. Thermocouples shall be inserted between the layers
as defined in 9.3.
6.3.2 Application of the fire protection materials to the timber test specimen
Fire protection systems comprising boards (or panels), for the fire protection of flat, two dimensional, timber
structures shall be arranged such that boards of the largest practical size are used and that at least one longitudinal
joint and one transverse joint, where applicable, are tested within the furnace.
Fire protection systems comprising boards (or panels), for the protection of beams and columns shall be arranged
such that boards of the largest practical size are used and that at least one longitudinal joint, one transverse joint and
one horizontal joint, where applicable, are tested within the furnace.
For multiple layer fire protection systems each layer shall be individually fixed and lateral joints staggered according
to ENV 1995-1-2.
The fire protection systems shall be applied to floor, beam and small scale test specimens as in practice.
6.3.3 Insulating materials
Where the timber structure to be protected by the fire protection material or system is to be provided with additional
insulating materials, within, around or adjacent to the timber members therein, then these shall be incorporated into
the test assembly as used in practice.
6.4 Composition of components of test specimen
6.4.1 Timber
The timber used for manufacture of characteristic floors or beams shall be of strength classes C14 to C40 as defined
in EN 338. Other grades may be used but the limits of applicability of the results of the assessment may be restricted
according to 15.1.6.
6.4.2 Particle board laminate
3 .
Particle board laminate shall meet the requirements of EN 312 and be of density 700 kg/m ± 10 % Its properties
shall meet those specified in EN 312-4.
When tests are performed with and without the applied fire protection, the density of the different particleboard
laminates shall not differ by more than 10 % from the mean measured density of all laminates in all tests.
6.4.3 Fire protection system
The composition of the fire protection system shall be specified by the sponsor and include, at least, its expected
nominal density, thickness and moisture content. For confidentiality reasons the sponsor may not wish detailed
formulation or composition details to be reported in the test report. Such data shall, however, be provided and
maintained in confidence in laboratory files.
6.5 Properties of test materials
The actual material properties of test specimen component materials shall be determined, according to EN 1363-1
and using appropriate product test standards, on test materials or test samples conditioned as defined in clause 8.
The actual thickness, density and moisture content of the fire protection materials shall be measured and recorded
for each test specimen at the time of test, either directly upon the fire protection material or upon special test samples
taken. These shall be conditioned as defined in clause 8. The procedures appropriate to different types of material
are given in annex C.
The thickness of board or panel type fire protection systems should not deviate by more than 15 % of the mean value
over the whole of its surface. In this case, the mean value shall be used in the assessment of the results and the limits
of applicability of the assessment. If it deviates by more than 15 %, the maximum thickness recorded shall be used
in the assessment.
The thickness of sprayed or coated passive or reactive type fire protection systems should not deviate by more than
20 % of the mean value over the whole of its surface. In this case, the mean value shall be used in the assessment
of the results and the limits of applicability of the assessment. If it deviates by more than 20 %, the maximum
thickness recorded shall be used in the assessment.
The density of the fire protection material applied to the test specimens at maximum and minimum thickness shall
be recorded. The mean value of the density of the fire protection material at maximum and minimum thickness shall
be used in the assessment of the results of the test, unless the difference between these is greater than 15 %, in which
case the maximum density recorded shall be used.
6.6 Verification of the test specimen
An examination and verification of the test specimen for conformity to specification shall be carried out as defined
in EN 1363-1.
The properties of the materials used in the preparation of the test specimen shall be measured using special samples,
where necessary, as defined in 6.5 using the methods defined in annex C.
The sponsor shall verify that the fire protection material has been applied correctly and in the case of sprayed or
coating materials ensure, by methods appropriate to the material, that it is of the design composition and
specification.
7 Installation of the test construction
7.1 Large scale tests
Loaded floors, carrying particleboard test specimen(s), protected with the fire protection system, shall be installed
onto the furnace according to EN 1365-2.
Loaded beams, covered with particleboard laminate, protected with the fire protection system, shall be installed onto
the furnace according to EN 1365-3.
7.2 Small scale tests
Small scale test specimens shall be installed across the furnace aperture, in horizontal mode, in an appropriate test
frame. The furnace/test assembly interface shall be sealed with non-combustible packing.
Should the ends of the test specimen be within the furnace these shall be blanked off to provide a level of fire
protection equal to or greater than that given to the timber by the fire protection material.
7.3 Installation patterns
Large scale tests and/or small scale tests may be tested together on a furnace providing:
- the thickness of applied fire protection is the same (either as single or multiple layer);
- separate specimen supports are provided and a furnace closure is applied to each to permit tests to safely
run for different durations without affecting the other test specimens.
Otherwise tests shall be run separately.
8 Conditioning of the test construction
The test construction and test samples taken for the determination of material properties (specified in 6.5) shall be
conditioned according to EN 1363-1. Material properties shall be determined according to methods specified in
annex C.
Timber shall be conditioned at 23 °C/50 % RH to give the moisture content specified in EN 1363-1. Care shall be
taken to ensure that this does not change substantially between conditioning and test.
9 Application of instrumentation
9.1 General
The instrumentation for the measurement of temperature, furnace pressure and deformation shall comply with the
requirements of EN 1363-1.
9.2 Instrumentation for measurement of furnace temperature
Plate thermometers of the type specified in EN 1363-1 shall be provided to measure the temperature of the furnace.
They shall be uniformly distributed and positioned as specified in the appropriate large scale test(s).
9.3 Instrumentation for measurement of test specimen temperature
Thermocouples for measuring temperatures upon the exposed surface of the particleboard laminates and within the
particleboard laminates, for both large and small scale tests, shall be of the double glass fibre insulated bare wire
type specified in EN 1363-1 and be positioned and fixed as specified therein. Such thermocouples shall be new when
used for this test.
Thermocouples shall be provided to measure test specimen temperature at temperature measurement stations at
which there shall be five thermocouples for measuring particleboard temperature: one for measuring particleboard
surface temperature beneath the fire protection material and one at each of the lower four interfaces between the
layers of particleboard (see Figure 1).
a) Large floor test specimens
Thermocouple measuring stations shall be provided to measure test specimen temperature at the centre of each
quadrant of each particleboard laminate test specimen included within the test construction, giving a total of
20 thermocouples, per particleboard test specimen.
b) Large beam test specimens
1 2
Thermocouple measuring stations shall be provided to measure test specimen temperature at / and / of the length
3 3
of the beam on each exposed face, giving a total of 30 thermocouples per beam.
c) Small test specimens
Thermocouple measuring stations shall be provided to measure test specimen temperature at the centre of each
quadrant of each particleboard laminate test specimen included within the test construction, giving a total of 20
thermocouples per particleboard test specimen.
d) Joints in the fire protection
Where joints are to be included within the fire protection system, thermocouples at 50 % of the locations shall be
positioned at a minimum of 50 mm from any joint or fixing in the fire protection system and those at the other
stations positioned coincident with the joint in the protection system. Such thermocouples shall be included for every
type of joint expected to occur in practice.
9.4 Instrumentation for measurement of pressure
Equipment for measuring pressure within the furnace shall be provided, located and used as specified in EN 1363-1.
9.5 Instrumentation for measurement of deformation
A means of measuring the vertical deformation of the test specimen at mid-span, relative to the supports, shall be
provided, located and used as specified in EN 1363-1 for large scale test specimens.
9.6 Instrumentation for measurement of applied load
Instrumentation for the measurement of applied load to loaded large scale test specimens shall be provided and used
as specified in EN 1363-1.
10 Test procedure
10.1 General
Carry out checks for thermocouple consistency and establish data points for temperature as specified in EN 1363-1
before commencement of the test and procedures defined in 10.2 to 10.7.
10.2 Furnace temperature and pressure
Measure and record the furnace temperature using the thermocouples defined in 9.2 and the furnace pressure in
accordance with the procedures and frequency specified in EN 1363-1.
Control the furnace temperature according to the data received from the plate thermometers to the criteria of
EN 1363-1.
Control the furnace pressure to the criteria of EN 1363-1.
10.3 Application and control of load
Using the procedures of EN 1363-1 apply a constant load to a loaded large scale test specimen, of magnitude in
accordance with 5.3, throughout the test period. The load shall be removed or reduced once the criteria of the
appropriate floor or beam (or other test) is/are reached as defined therein.
10.4 Temperature of test specimen
Measure and record the temperature of the test specimen using the thermocouples specified in 9.3, at intervals not
exceeding one minute.
10.5 Deformation
Using the procedures of EN 1363-1, for the loaded large scale test specimens, apply the load, monitor and record
the deformation and/or rate of change of deformation continuously.
10.6 Observations
Wherever practical, monitor the general behaviour of the test specimen, especially the fire protection, throughout
the test as described in EN 1363-1.
10.7 Termination of test
Terminate the test when the temperature indicated by all thermocouples in the particleboard laminate reaches 300 °C
or when one or more of the reasons for termination specified in EN 1363-1 occurs.
11 Test results
11.1 Acceptability of test results
It is possible that within any test apparently erroneous results may occur through failure of thermocouples, abnormal
behaviour of the test specimen etc. The criteria for acceptability of temperature data given in EN 1363-1 shall be
observed.
11.2 Presentation of test results
The following shall be reported within the test report:
a) the results of measured dimensions and actual material properties, especially the properties of the timber
and the particleboard laminate and the thickness, density and moisture contents of the fire protection and
its components required according to 6.5;
b) the individual results of all furnace temperature measurements and the mean of all individual furnace
temperature measurements, taken as specified in EN 1363-1, graphically presented and compared with the
specified requirements and tolerances given in EN 1363-1;
c) the individual results of all furnace pressure measurements and the mean of all individual furnace pressure
measurements, taken as specified in EN 1363-1, graphically presented and compared with the specified
requirements and tolerances given in EN 1363-1;
d) for each particleboard test specimen, the individual results and the mean of all individual results of all
temperature measurement thermocouples at the equivalent locations given in 9.3, all graphically presented.
Evidence of compliance with the validity criteria of 11.1. Equivalent locations are:
i) at the surface of the particleboard laminate beneath the fire protection material, 50 mm away from
any joint in the fire protection;
ii) at the surface of the particleboard laminate beneath the fire protection material, at a joint in the
fire protection;
iii) at the interface between each layer in the particleboard laminate, 50 mm away from any joint in
the fire protection;
iv) at the interface between each layer in the particleboard laminate, at a joint in the fire protection;
e) the individual results and the mean of all individual results of all the deformation measurements, specified
in 10.5, all graphically presented. If the load is removed or reduced according to 10.3, the time at which
this occurred.
These results b) to e) may be presented as a selection of the measured data sufficient to give a history of
the performance of the test specimen according to EN 1363-1.
These results may also be prepared and printed in tabular form and/or presented upon computer diskette.
In the latter case this shall be prepared in an appropriate, secure "read only" format to prevent alteration.
The only legally genuine data shall be those data maintained in the laboratory files;
f) the results of observations made and the times at which they occured shall be reported.
12 Test report
The test report shall include the following statement:
"This report provides the constructional details, the test conditions, the results obtained and the interpolated data
obtained when a specific form of construction was tested following the procedures of ENV 13381-7. Any deviation
with respect to thickness and density of fire protection system, timber type and construction could invalidate the
assessment of the test result".
In addition to the items required by EN 1363-1, the following shall also be included in the test report:
a) details of the fabrication of the test specimens. The fixing details of the fire protection system. Details of
the conditioning of the test construction(s). Details of the installation of the test construction(s) onto the
furnace;
b) the composition and measured properties, especially density, thickness and moisture content, of components
of the test specimens which are required to be determined and their method of determination;
c) a description of significant behaviour of the test specimen observed during the test period, including
observation of the time(s) and magnitude of any detachment of the fire protection material;
d) the magnitude of the load applied to the test large scale specimens as a function of time and if removed,
the time at which this occurred;
e) the reason, on the basis of the criteria of 10.7 of this test method, for the termination of the test and the time
elapsed when the test was terminated;
f) results of any tests carried out to the smouldering fire (slow heating curve) given in annex A.
13 Assessment
13.1 General
The assessment method details the means whereby the results of temperature measurement and observations made
throughout the test are used to provide the following:
a) the relationship between particleboard laminate surface and internal temperature, time and thickness of fire
protection;
b) the effectiveness of the fire protection system to delay temperature rise and the beginning of charring of
the timber and the magnitude of the rate of charring material;
c) information on stickability and the behaviour of joints in the fire protection and, if required, information
on the behaviour of added fixtures and fittings;
d) optional additional data on the performance of the fire protection system at alternative thicknesses than
those thicknesses tested.
From the temperature data collected and reported in 11.2 and clause 12 the following shall be identified:
- the graphs of the mean of all individual temperatures for each thermocouple group or location as defined
in 11.2 (d);
- the graphs of the individual temperatures giving rise to the highest individual temperature for each
thermocouple group or location as defined in 11.2 d).
The mean of the mean temperature and the maximum individual temperature for each thermocouple group or
location as defined in 11.2 d) ie. [(mean + maximum) / 2] shall be calculated and similarly presented as described
in 11.2. These results shall be used as the characteristic temperature in the assessment under 13.2.
13.2 Assessment of failure time and charring rates
This test method examines charring rates and the advancement of the char line through both the protected and the
unprotected timber structural member. For application of results see annex B.
The temperature at which charring of timber begins is generally accepted to be 300 °C. Therefore t is the time at
pr
which the temperature of the protected timber surface reaches 300 °C.
The values of charring rates ߴ and ߆ are determined for unprotected and protected test specimens as the slopes of
relationships between charring depth d and time. See Figure 2.
char
The charring depth d is the distance of a thermocouple recording 300 °C from the surface and the corresponding
char
time values t and t .
300,unprot 300,prot
The ratio of ߆/ߴ is assumed to be species independent. Normally one or both relationships between charring depth
and time are non-linear. Therefore the charring rates ߴ (actual unprotected charring rate from testing) and ߆ (actual
protected charring rate from testing- shall be taken as secant values as shown in Figure 3. The limit of application
is given as t .
test
13.3 Preparation and use of basic data
a) From 13.2, determine the following basic data:
- [unloaded] t , ߆, ߴ and [ ߆ / ߴ] versus time for each thickness of the fire protection system;
pr
- [loaded] t , ߆, ߴ and [ ߆ / ߴ] versus time for each thickness of the fire protection system.
pr
b) Correct the data from the unloaded tests [unloaded] t , ߆, ߴ and [ ߆/ߴ] at each t
...