oSIST prEN 13381-2:2008

SLOVENSKI STANDARD
01-december-2008
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Test methods for determining the contribution to the fire resistance of structural members
- Part 2: Vertical protective membranes
Prüfverfahren zur Bestimmung des Beitrages zum Feuerwiderstand von tragenden
Bauteilen - Teil 2: Vertikal angeordnete Brandschutzbekleidungen
Méthodes d'essai pour déterminer la contribution à la résistance au feu des éléments de
construction - Partie 2: Membranes de protection verticales
Ta slovenski standard je istoveten z: prEN 13381-2
ICS:
13.220.50 Požarna odpornost Fire-resistance of building
gradbenih materialov in materials and elements
elementov
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
DRAFT
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2008
ICS Will supersede ENV 13381-2:2002
English Version
Test methods for determining the contribution to the fire
resistance of structural members - Part 2: Vertical protective
membranes
Méthodes d'essai pour déterminer la contribution à la Prüfverfahren zur Bestimmung des Beitrages zum
résistance au feu des éléments de construction - Partie 2: Feuerwiderstand von tragenden Bauteilen - Teil 2: Vertikal
Membranes de protection verticales angeordnete Brandschutzbekleidungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 127.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13381-2:2008: E
worldwide for CEN national Members.

Contents Page
Foreword. 4
1 Scope. 5
2 Normative references. 5
3 Terms and definitions, symbols and units. 6
3.1 Terms and definitions. 6
3.2 Symbols and units . 7
4 Test equipment. 7
4.1 General. 7
4.2 Furnace. 7
4.3 Test frame. 7
4.4 Supporting construction. 8
4.5 Furnace closure. 8
5 Test conditions. 9
5.1 General. 9
5.2 Support and restraint. 9
5.2.1 Standard conditions. 9
5.2.2 Other support and restraint conditions. 9
6 Test specimens. 9
6.1 General. 9
6.2 Number of tests. 10
6.3 Size of test specimen. 10
6.4 Structural building members . 10
6.4.1 Standard vertical structural building members . 10
6.4.2 Practical vertical structural members. 12
6.5 Properties of test materials. 12
6.6 Verification of the test specimen. 12
6.7 Optional and additional steel plates within the cavity . 13
7 Installation of the test construction. 13
8 Conditioning. 13
9 Application of instrumentation. 14
9.1 General. 14
9.2 Instrumentation for measurement of furnace temperature . 14
9.3 Instrumentation for measurement of specimen temperature. 14
9.3.1 General. 14
9.3.2 Instrumentation for measuring cavity temperature. 14
9.3.3 Instrumentation for measuring surface temperatures . 14
9.3.4 Optional and supplementary instrumentation for measuring temperature . 15
9.4 Instrumentation for measurement of pressure. 16
10 Test procedure. 16
10.1 General. 16
10.2 Furnace temperature and pressure. 16
10.3 Temperatures of the test specimen . 16
10.4 Observations. 16
10.5 Termination of the test . 16
11 Test results. 16
11.1 Acceptability of test results . 16
11.2 Presentation of test results. 17
12 Test report. 17
13 Assessment. 18
13.1 General. 18
13.2 Assessment of loadbearing capacity. 18
13.2.1 General. 18
13.2.2 Reference temperature curve : cavity temperatures. 18
13.2.3 Reference temperature curve: surface temperatures (steel or concrete or
composite columns) . 18
13.2.4 Application of method of limiting temperatures. 19
13.3 Assessment of insulation . 19
13.4 Assessment of data for calculation purposes . 19
13.5 Combustible materials in the cavity. 21
14 Report of the assessment . 21
15 Limits of applicability of the results of the assessment. 22
15.1 Type of vertical structural building member. 22
15.2 Type of steel column . 24
15.3 Type of concrete column. 24
15.4 Type of concrete filled hollow steel composite column . 24
15.5 Type of concrete . 25
15.6 Timber column. 25
15.7 Depth of the cavity. 25
15.8 Type of closure opposite to the vertical protective membrane . 25
15.9 Properties of the vertical protective membrane . 25
15.10 Size of panels within the vertical protective membrane. 25
15.11 Fixtures and fittings. 25
15.12 Applicability of results from test columns to beams or combined column / beam
structural building members . 26
Annex A (normative) Measurement of properties of vertical protective membranes and
components. 30
A.1 General. 30
A.2 Thickness of vertical protective membrane and components thereof. 30
A.3 Density of vertical protective membranes and components thereof . 31
A.3.1 General. 31
A.4 Moisture content of vertical protective membrane and components thereof . 32
Bibliography . 33

Foreword
This document (prEN 13381-2:2008) has been prepared by Technical Committee CEN/TC 127 “Fire
safety in buildings”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede ENV 13381-2:2002.
This document has been prepared under a mandate given to CEN by the European Commission and
the European Free Trade Association, and supports essential requirements of 89/106/EEC.
This European Standard 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 the standard are:
Part 1: Horizontal 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.
Part 7: Applied protection to timber members.
The fire protection provided by the vertical protective membrane can be nullified by the presence of
combustible materials in the cavity behind the membrane. The assessment methodology can be
modified according to the quantity and position of such materials within that cavity.
Annex A is normative.
Caution
The attention of all persons concerned with managing and carrying out this fire resistance test, is
drawn to the 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 shall be made and safety precautions shall
be identified and provided. Written safety instructions shall be issued. Appropriate training shall be
given to relevant personnel. Laboratory personnel shall ensure that they follow written safety
instructions at all times.
The specific health and safety instructions contained within this Standard shall be followed.
When testing concrete filled hollow steel composite columns steam release holes shall be provided for
the release of steam from the column, during the test, as specified in prEN 13381-6.

1 Scope
This part of this European Standard specifies a test method for determining the ability of a vertical
protective membrane, when used as a fire resistant barrier, to contribute to the fire resistance of
loadbearing vertical structural building members fabricated from steel, concrete, steel/concrete
composites or timber. The method described is applicable to any type of vertical protective
membrane, which can be associated with a separate bracing membrane.
The vertical protective membrane can be separate from the structural building member and be self-
supporting or can be attached to the structural building member and can form part of any load bearing
structure. This test method is applicable to vertical protective membranes where there is a separating
gap of at least 5 mm size between the vertical protective membrane and the structural building
member, otherwise alternative test methods prEN 13381-3, prEN 13381-4, prEN 13381-6 or
prEN 13381-7 shall be used as appropriate
This test method and assessment is not applicable to the following:
a) all situations where the cavity behind the vertical protective membrane contains more than a
specified amount of combustible materials, e.g. electrical cables and pipes, other than where
timber structural members themselves are required;
b) all situations where the cavity is to be used as a service or ventilation shaft;
c) all situations where the vertical protective membrane acts as a bracing membrane.
This European Standard contains the fire test which specifies the tests which shall be carried out
whereby the vertical protective membrane together with the structural member to be protected is
exposed to the specified fire. The fire exposure, to the standard temperature/time curve given in
EN 1363-1, is applied to the side which would be exposed in practice.
The test method makes provision, through specified optional additional procedures, for the collection
of data which can be used as direct input to the calculation of fire resistance according to the
processes given in EN 1992-1-2, EN 1993-1-2, EN 1994-1-2 and EN 1995-1-2.
This European Standard also contains the assessment which provides information relative to the
analysis of the test data and gives guidance for the interpretation of the results of the fire test, in terms
of loadbearing capacity criteria of the protected vertical structural member.
The results of the fire test and the assessment can be applied, with certain defined provisions, to
vertical structural building members which can be beams, columns or a combination of both and / or
which could form part of a separating element or partition.
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 structures, membranes and fittings.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publica-
tions. 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 Standard 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 206-1, Concrete – Part 1: Specification, performance, production and conformity
EN 1992-1-2, Eurocode 2: Design of concrete structures – Part 1-2: General rules – Structural fire
design
EN 1993-1-2, Eurocode 3: Design of steel structures – Part 1-2: General rules – Structural fire design
EN 1994-1-2, Eurocode 4: Design of composite steel and concrete structures –
Part 1-2: General rules - Structural fire design (including Technical Corrigendum 1:1995)
EN 1995-1-2, Eurocode 5: Design of timber structures – Part 1-2 General rules – Structural fire design
EN 10025, Hot rolled products of non-alloy structural steels – Technical delivery conditions
EN 10080, Steel for the reinforcement of concrete – Weldable ribbed reinforcing steel B 500 –
Technical delivery conditions for bars, coils and welded fabric
EN 10113, Hot rolled products in weldable fine grade structural steels
prEN 13381-3, Test methods for determining the contribution to the fire resistance of structural
members Part 3: Applied protection to concrete members
prEN 13381-6, Test methods for determining the contribution to the fire resistance of structural
members – Part 6: Applied protection to concrete filled hollow steel columns
prEN 13381-7, Test methods for determining the contribution to the fire resistance of structural
members – Part 7: Applied protection to timber members
ISO 8421-2, Fire Protection – Vocabulary – Part 2: Structural fire protection
EN 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 Standard, the terms and definitions given in EN 1363-1,
EN ISO 13943 and ISO 8421-2 and the following apply.
3.1.1
vertical structural building member
vertical loadbearing structural element of building construction, which may be a column, a beam or a
combination of both, and / or which might form part of a separating element or partition and which is
fabricated from either concrete, steel, steel/concrete composite or timber
3.1.2
vertical protective membrane
material or construction which is installed in front of a vertical structural building member and which is
intended to give additional fire resistance to that member
The vertical protective membrane may comprise multiple layers of materials.
3.1.3
structural building member test column
test column, representing the loadbearing structural building member to be protected in practice, in
front of which the vertical protective membrane test specimen is installed for the purposes of the test
3.1.4
vertical protective membrane test specimen
full vertical protective membrane assembly submitted for test, including typical fixing equipment and
methods and typical features such as insulating materials, light fittings, ventilation ducts
3.1.5
furnace closure
fire resistant vertical construction designed to close the furnace and with the vertical protective
membrane create a cavity within which the test column is placed
3.1.6
separating gap
distance between the rear face of the vertical protective membrane and the closest surface of the
structural building member test column
3.1.7
cavity
whole void between the rear face of the vertical protective membrane and the furnace closure
3.1.8
fire protection
protection afforded to the structural building member by the vertical protective membrane such that
the temperature on the surface of the test column and within the cavity is limited throughout the period
of exposure to fire
3.2 Symbols and units
Symbol  Unit  Designation
-1
A /V  m  Section factor of unprotected steel column (see prEN 13381-4).
m
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 6.3 and its installation to be as described in Clause 7.
4.3 Test frame
The vertical protective membrane test specimen, the test column and the furnace closure shall be
mounted in a test frame which shall be designed such that it possesses sufficient stiffness appropriate
to the test construction. A suitable frame for this purpose shall have head and side members
constructed from steel section protected with refractory concrete having a nominal density of at least
2 000 kg/m .
The dimensions of the test frame shall be such that the furnace closure, the test column and the
vertical protective membrane test specimen, together with any supporting construction, may be
installed within it (see Figure 1) and permit the size of the test construction exposed to heating to be
as specified in 6.3.
4.4 Supporting construction
If the size of the vertical protective membrane test specimen is smaller than the test frame of the
laboratory then the test frame opening shall be reduced in size, whilst still fulfilling the general
requirements for test frames, by the following which may be provided to accommodate the test
specimen:
a) where the height is smaller, a plinth shall be provided to adjust the opening to the required size;
b) where the overall dimensions are smaller, a supporting construction shall be built in the test
frame.
If the vertical protective membrane is required in practice to be used together with any supporting
construction then the test construction shall include that supporting construction, otherwise, a
standard construction made of aerated concrete slabs or blocks of density (650 ± 200) kg/m and
thickness (100 ± 10) mm, bonded with sand / cement mortar or other fire resistant material shall be
used.
4.5 Furnace closure
The fire resistant furnace closure is designed to close the furnace and to create, together with the
vertical protective membrane test specimen, a cavity to contain the test column.
The normal furnace closure shall comprise a wall built within the test frame comprising aerated
concrete slabs or blocks of density (650 ± 200) kg/m and thickness (100 ± 10) mm, bonded with
sand/cement mortar or other appropriate fire resistant material.
Where the vertical protective membrane is to be used on all sides of the structural building member,
and where exposure to fire might be expected to occur from any side, then the furnace closure shall
comprise the same vertical protective membrane system. This type of furnace closure shall be sealed
into the test frame by the same method as would be used for the vertical protective membrane in use.
The applicability of the result shall be restricted in this case (see 15.8).
At the request of the sponsor, insulation material of lower insulation performance than that normally
required, representing a high heat loss external or internal wall or open cavity situation (remote from
the fire exposure side) may be used. The choice of such materials shall be made by the sponsor. The
laboratory shall ensure that they are inserted into the test frame and all joints sealed, both within the
closure and around its edges, such that leakage of gases from the cavity cannot occur. The
applicability of the result shall be restricted in this case (see 15.8).
If the vertical protective membrane is to be used in a situation where it forms a ventilated cavity in
which the building member it protects is situated, then the test cavity shall be ventilated in a manner
representative of practice. The applicability of the result shall be restricted in this case (see 15.8).
5 Test conditions
5.1 General
A loadbearing vertical structural building member represented by an unloaded test column is
protected against fire by a vertical protective membrane and subjected to the fire test defined herein.
The temperature within the cavity and the surface temperature of the test column are measured
throughout the test.
It is recommended that the test is continued until the mean temperature recorded by all
thermocouples within the cavity, reaches the appropriate limiting temperature for the test columns
used or until any individual temperature recorded within the cavity, rises to 750 °C for steel, concrete
or concrete filled hollow steel columns and 500 °C for timber columns.
The procedures given in EN 1363-1 shall be followed in the performance of this test method unless
otherwise stated in this European Standard.
5.2 Support and restraint
5.2.1 Standard conditions
Where the vertical protective membrane test specimen in practice is not larger than the furnace
opening, the edges of the specimen shall be installed and restrained as in practice.
Where the vertical protective membrane test specimen in practice is larger than the furnace opening
then it shall be installed as in practice, but with one vertical edge unrestrained and having freedom of
movement, the remaining edges being restrained as in practice.
Any unrestrained edges shall be sealed with fire resistant material which shall accommodate
movement of those edges and yet not restrict that movement, or allow furnace gases to leak into the
cavity. The distance between the exposed face of the vertical protective membrane and the forward
edge of the test frame shall be sufficient to accommodate any bowing of the membrane, without
allowing furnace gases to leak into the cavity. The sponsor shall define expected bowing, where
possible.
5.2.2 Other support and restraint conditions
Support and restraint conditions differing from the standard conditions specified in 5.2.1 shall be
described in the test report and the validity of the results restricted to that tested.
6 Test specimens
6.1 General
The structural building member to be used in the test shall be as given in 6.3 and be chosen from
those standard members described in 6.4.1 and be representative of that to be used in practice.
Alternatively an actual practical structural vertical building member may be used according to 6.4.2.
Vertical protective membranes would typically be board or panel type partitions or membranes,
comprising timber, plaster, mineral wool or similar materials. They shall be installed in front of the test
column by the procedures given in the installation manual or other written instructions provided by the
sponsor. The means of connection and use of insulation between the membrane and the test frame
shall be defined by the sponsor.
Where the vertical protective membrane is expected to include joints or a gap (or gaps) for design
purposes or in practice these shall be included within the vertical protective membrane test specimen
and be included in a manner representative of practice, in both vertical and horizontal directions.
All fixtures and fittings expected to be installed shall be included in the vertical protective membrane
test specimen and the spacing of these shall be representative of practice. Such fixtures and fittings
shall not be installed within the test specimen at a distance of less than 500 mm from any of its edges.
Any combustible materials required to be present in the cavity, representing the practical situation,
shall be identified and their fire load density calculated.
6.2 Number of tests
Normally for a vertical protective membrane designed for one sided protection of a vertical structural
building member only one test shall be carried out.
Where a vertical protective membrane is manufactured with elements or components of variable size
or may be installed by different procedures, then a unique test shall be carried out on elements or
components at maximum and minimum size and with every expected installation procedure for which
the sponsor requires approval.
Where a vertical protective membrane is designed to protect two or more sides of a structural building
member and the vertical protective membrane is the same on all sides then one test only shall be
required. In this test the furnace closure shall be the vertical protective membrane itself as given in
4.5.
Where a vertical protective membrane is designed to protect two or more sides of a structural building
member and the vertical protective membrane is not the same on all sides then unique tests shall be
required for each type of membrane, with each in turn presented to the furnace. Each test result shall
be treated separately for field of direct application purposes.
6.3 Size of test specimen
The size of the test construction and furnace aperture shall be at least 3 000 mm × 3 000 mm. The
whole area of the test construction shall be exposed to the furnace conditions.
If the vertical protective membrane in practice is less than 3 000 mm × 3 000 mm then the test
specimen shall be brought up to this size by the use of a supporting construction.
When the actual size is larger than can be accommodated in the furnace then a reduced size test
specimen, of size not less than 3 000 mm × 3 000 mm, including representative joints in both
horizontal and vertical directions, shall be used.
6.4 Structural building members
6.4.1 Standard vertical structural building members
Each test construction shall include at least two, possibly three, standard test columns, representing
loadbearing vertical structural building members.
The test column or columns, chosen by the sponsor, may be steel, concrete, concrete filled hollow
steel or timber according to the sponsor's wishes and the desired applicability of the test result (see
Table 2). They may be tested separately or different types of columns tested together.
When timber test columns are used together with other types of column, the final termination
temperature shall be that appropriate to the timber test column. Timber test columns will normally be
tested separately for this reason.
Test columns shall have a height of (3 000 ± 50) mm and be securely fixed vertically in the test frame
at the top and bottom, with allowance for expansion.
Test columns shall be positioned:
1 2
i) i) two columns used : placed symmetrically at / and / exposed width;
3 3
ii) ii) three columns used : placed symmetrically at ¼, ½ and ¾ exposed width;
with a clear space of (20 ± 10) mm between the test column and the furnace closure.
The separating gap between the test columns and the vertical protective membrane shall be defined
by the sponsor, be normally that to be used in practice but, however, be no less than 5 mm size.
The following structural building members upon which the test columns are based are considered to
be standard for this test method.
a) Steel test columns
The standard steel test column shall comprise a hot rolled H profile steel column of section type
HEB 140 with section depth of typically (140 ± 5) mm. The grade of steel used shall be any
structural grade (S designation) to EN 10025 or EN 10113 (excluding S185). Engineering grades
(E designation) shall not be used.
Provision shall be made to minimise heat transfer from the ends of the steel column. The ends
shall be protected with insulation board or similar material.
b) Concrete test columns
The standard concrete test column shall possess a cross section of 150 mm × 200 mm. It shall
be made from normal concrete of density (2 300 ± 150) kg/m . The concrete shall be of type
C20/25 or C25/30 prepared from silicious aggregates, of maximum dimension of 20 mm and
portland cement according to EN 206-1. It shall contain 12 mm diameter reinforcing bars which
shall be ribbed and of grade B 500 or comparable grade to EN 10080. They shall be covered by
20 mm to 25 mm of concrete. Permitted tolerances on size of reinforcing bars are given in
EN 10080.
Other concrete grades within the strength range C20/25 to C50/60 and other non-silicious
aggregates may be used, however, the applicability of the result shall be restricted according to
prEN 13381-3.
The concrete column shall be prepared in a smooth surfaced framework made from steel or
timber. To facilitate its release from the framework soluble oils or emulsions shall be used. The
actual material used for this purpose shall be described in detail in the test report.
The consistency of the wet concrete shall be of type S3 or F3 determined in accordance with
EN 206-1, to allow for good compaction and production of a smooth surface.
c) Concrete filled hollow steel test columns
The standard concrete filled hollow steel test column shall be prepared as described in
prEN 13381-6, the grade of steel and the concrete type, composition and strength shall be as
specified in prEN 13381-6.
Steel plates shall be fixed to the top and bottom of the column as specified in prEN 13381-6.
Provision for the release of steam from the column shall be made, using steam release holes cut
within the steel tube, as specified in prEN 13381-6.
d) Timber test columns
The standard timber test column shall comprise softwood timber of density (450 ± 75) kg/m . It
shall possess a cross section of 100 mm × 50 mm.
6.4.2 Practical vertical structural members
The fire protection given by a vertical protective membrane to any practical vertical structural member
(different from those specified in 6.4.1) may be evaluated using the principles given in this test
method, although the application of the result is restricted to that tested.
6.5 Properties of test materials
Where appropriate, the actual properties of materials used in the structural building member tested
(e.g. concrete strength) shall be determined according to EN 1363-1, using an appropriate product
test standard e.g. concrete strength. Otherwise nominal values may be used e.g. for steel and wood
based materials. The dimensions of the structural building member used shall be measured.
The composition of the vertical protective membrane shall be specified by the sponsor and include, at
least, its expected nominal density, moisture content and heat capacity. 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.
The actual thickness, density and moisture content of the components of the vertical protective
membrane shall be measured and recorded, just prior to the time of test, on the components
themselves or on special test samples taken from the test component. These shall be conditioned as
defined in Clause 8.
The procedures appropriate to different types of material are given in annex A. The thickness of
sprayed or coated passive or reactive fire protection materials when used as component parts of
vertical protective membranes shall be measured in the proximity of each of the nine positions in the
three cross sectional areas defined in 9.3.2 and Figure 2.
The thickness of a board or panel type vertical protective membrane and its components shall 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 materials when used as
component parts of vertical protective membranes shall 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 vertical protective membrane shall be measured according to annex A and
recorded. The density shall not deviate by more than 15 % of the mean value. 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 density recorded shall be used in the assessment.
6.6 Verification of the test specimen
An examination and verification of the test specimen for conformity to specification shall be carried out
as described 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 described in 6.5 using the methods given in Annex A.
The sponsor shall verify materials contained within the test specimen which are applied by spray or
coating for compliance to design composition and specification using tests appropriate to the material.
6.7 Optional and additional steel plates within the cavity
At the request of the sponsor, where there is a need to obtain test data for use as direct input to the
calculation of fire resistance according to the procedures given in EN 1992-1-2, EN 1993-1-2,
EN 1994-1-2 and EN 1995-1-2 additional steel plates shall be used within the cavity.
Two such steel plates of size (1 000 mm × 300 mm × 10 mm shall be suspended vertically, in the long
direction, within the cavity, each with its top edge at ¾ furnace height. Each shall be placed
symmetrically between or around the test columns, depending upon the number of test columns used
(see 6.4.1). They shall be placed halfway between the vertical protective membrane and the furnace
closure.
They shall be suspended from the top of the test frame by 10 mm diameter steel threaded rods or
brackets of similar cross sectional area. Thermal breaks shall be incorporated between each plate
and its suspension device.
7 Installation of the test construction
The test column(s) shall be mounted vertically in the plane of the test frame and the furnace.
Steel test columns shall be installed with the flanges parallel to the surface of the vertical protective
membrane. Non-symmetrical concrete test columns shall be installed with the longer edge parallel to
the surface of the vertical protective membrane.
The vertical protective membrane test specimen when tested full size shall be installed in the opening
in the test frame in a manner representative of its use in practice.
Where a plinth or supporting construction is to be used to increase the size of the vertical protective
membrane test specimen, according to 4.4, then the test specimen shall be fixed to this and to the
test frame in a manner representative of its use in practice. The plinth or supporting construction shall
have been installed and attached within the test frame in a suitable manner.
The furnace closure shall be installed in the test frame according to 4.5.
The order in which the columns, furnace closure,
...