prEN 13381-2

SLOVENSKI STANDARD
oSIST prEN 13381-2:2008
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
oSIST prEN 13381-2:2008 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 13381-2:2008

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oSIST prEN 13381-2:2008
EUROPEAN STANDARD
DRAFT
prEN 13381-2
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.

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oSIST prEN 13381-2:2008
prEN 13381-2:2008 (E)
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
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prEN 13381-2:2008 (E)
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

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oSIST prEN 13381-2:2008
prEN 13381-2:2008 (E)
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.

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oSIST prEN 13381-2:2008
prEN 13381-2:2008 (E)
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
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oSIST prEN 13381-2:2008
prEN 13381-2:2008 (E)
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
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oSIST prEN 13381-2:2008
prEN 13381-2:2008 (E)
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
3
2 000 kg/m .
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prEN 13381-2:2008 (E)
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
3
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
3
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).
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oSIST prEN 13381-2:2008
prEN 13381-2:2008 (E)
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 re
...