SIST ENV 13381-5:2003
(Main)Test methods for determining the contribution to the fire resistance of structural members - Part 5: Applied protection to concrete/profiled sheet steel composite members
Test methods for determining the contribution to the fire resistance of structural members - Part 5: Applied protection to concrete/profiled sheet steel composite members
This European Prestandard specifies a test method for determining the contribu-tion of fire protection systems to the fire resistance of structural concrete/profiled sheet steel composite members or slabs. The concrete can be lightweight, normal-weight or heavy-weight concrete and of strength classes 20/25 (LC/C/HC) to 50/60 (LC/C/HC).
The method is applicable to all fire protection systems used for the protection of such structural composite members or slabs and includes sprayed fire protection, coatings, cladding protection systems and multi-layer or composite fire protection materials.
The test method and its assessment procedure are designed to permit direct application of the results to cover a range of thicknesses of the applied fire protection material.
The test method is only applicable to fire protection systems which are fixed directly to the underside of the concrete/steel composite member or slab. Fire protection systems where the fire protection material is not attached directly to the composite member, leading to a continuous cavity between the concrete/steel composite member and the fire protection system of size greater than 5 mm is the subject of prENV 13381-1.
This European Prestandard contains the fire test which specifies the tests which shall be carried out to determine the ability of the fire protection system to remain coherent and fixed to the composite member and to provide data on the temperatures of the steel sheet, throughout the depth of the concrete (for extended application purposes) and the unexposed surface of the concrete, 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 colle
Prüfverfahren zur Bestimmung des Beitrages zum Feuerwiderstand von tragenden Bauteilen - Teil 5: Brandschutzmaßnahmen für profilierte Stahlblech/Beton Verbundkonstruktionen
Dieser Teil dieser Europäischen Vornorm legt ein Prüfverfahren fest zur Bestimmung des Beitrags von Brandschutzsystemen zur Feuerwiderstandsfähigkeit von tragenden profilierten Stahlblech/Beton Verbundkonstruktionen oder Verbundplatten. Der Beton kann Leichtbeton, Normalbeton oder Schwerbeton der Festigkeitsklassen 20/25 (LC/C/HC) bis 50/60 (LC/C/HC) sein.
Das Prüfverfahren gilt für alle Brandschutzsysteme, die für den Schutz der tragenden Verbundkonstruktionen oder -platten verwendet werden und beinhaltet aufgesprühte Brandschutzmaterialien, Bekleidungen, Beschichtungsschutzsysteme und Mehrschicht- oder Verbundsysteme
Das Prüfverfahren und sein Beurteilungsverfahren sind so ausgelegt, dass eine direkte Anwendung der Ergebnisse möglich ist, um einen Bereich von Dicken des aufgebrachten Brandschutzmaterials abzudecken.
Das Prüfverfahren gilt nur für Brandschutzsysteme, die direkt auf der Unterseite der Stahlblech/Beton Verbundkonstruktion oder Verbundplatte befestigt sind. Brandschutzsysteme, bei denen das Brandschutzmaterial nicht direkt auf der Verbundkonstruktion befestigt ist und bei denen dadurch ein durchgehender Hohlraum zwischen der Stahlblech/Beton Verbundkonstruktion und dem Brandschutzsystem von mehr als 5 mm entsteht, werden in ENV 13381-1 behandelt.
Diese Europäische Vornorm beinhaltet die Brandprüfung, die durchgeführt werden muss, um die Fähigkeit des Brandschutzsystems zusammenhängend und mit der Verbundkonstruktion fest verbunden zu bleiben, zu bestimmen und um Daten über die Temperaturen des Stahlblechs über die Tiefe des Betons (für erweiterte Anwendungszecke) und die unbeflammte Oberfläche des Betons zu liefern, wenn diese der Einheits-Temperaturzeitkurve nach den hier definierten Verfahren ausgesetzt werden.
Méthodes d'essai pour déterminer la contribution a la résistance au feu des éléments de construction - Partie 5: Protection appliquée aux dalles mixtes béton/tôle d'acier profilée
Cette partie de l'ENV 13381 spécifie une méthode d'essai permettant de déterminer la contribution apportée par les systemes de protection contre le feu a la résistance au feu des éléments ou dalles de construction mixtes béton/tôle d'acier profilée. Le béton peut etre de type léger, normal ou compact et appartenir aux classes de résistance aux contraintes 20/25 (LC/C/HC) a 50/60 (LC/C/HC).
La méthode d'essai est applicable a tous les systemes de protection contre le feu utilisés pour protéger ces éléments ou dalles de construction mixtes et englobe les matériaux de protection contre le feu appliqués par pulvérisation, les revetements, les systemes de protection en plaque et les matériaux de protection contre le feu multi-couches ou mixtes.
La méthode d'essai et sa procédure d'évaluation sont conçues pour permettre l'application directe des résultats a une gamme d'épaisseurs du matériau de protection contre le feu.
La méthode d'essai est seulement applicable aux systemes de protection contre le feu qui sont fixés directement sur la face inférieure de l'élément ou dalle mixte béton/acier. Les systemes dans lesquels le matériau de protection contre le feu n'est pas fixé directement sur l'élément mixte, entraînant la présence d'une cavité continue, mesurant plus de 5 mm, entre l'élément mixte béton/acier et le systeme de protection contre le feu, constituent l'objet de l'ENV 13381-1.
La présente prénorme européenne contient l'essai au feu, qui spécifie les essais qui doivent etre effectués pour déterminer l'aptitude du systeme de protection contre le feu a rester cohérent et fixé sur l'élément mixte, et pour obtenir des données concernant les températures de la tôle d'acier, dans toute l'épaisseur du béton pour des extensions d'application et sur la surface du béton non exposée, lorsque cet élément est exposé au feu suivant la courbe de température/temps normalisée, conformément aux procédures définies dans le présent document.
Dans des circonstances particuliere
Preskusne metode za ugotavljanje prispevka k požarni odpornosti konstrukcijskih elementov - 5. del: Zaščita kompozitnih elementov iz betona in jeklene profilirane pločevine
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST ENV 13381-5:2003
01-januar-2003
3UHVNXVQHPHWRGH]DXJRWDYOMDQMHSULVSHYNDNSRåDUQLRGSRUQRVWLNRQVWUXNFLMVNLK
HOHPHQWRYGHO =DãþLWDNRPSR]LWQLKHOHPHQWRYL]EHWRQDLQMHNOHQHSURILOLUDQH
SORþHYLQH
Test methods for determining the contribution to the fire resistance of structural members
- Part 5: Applied protection to concrete/profiled sheet steel composite members
Prüfverfahren zur Bestimmung des Beitrages zum Feuerwiderstand von tragenden
Bauteilen - Teil 5: Brandschutzmaßnahmen für profilierte Stahlblech/Beton
Verbundkonstruktionen
Méthodes d'essai pour déterminer la contribution a la résistance au feu des éléments de
construction - Partie 5: Protection appliquée aux dalles mixtes béton/tôle d'acier profilée
Ta slovenski standard je istoveten z: ENV 13381-5:2002
ICS:
13.220.50 Požarna odpornost Fire-resistance of building
gradbenih materialov in materials and elements
elementov
91.080.01 Gradbene konstrukcije na Structures of buildings in
splošno general
SIST ENV 13381-5:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST ENV 13381-5:2003
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SIST ENV 13381-5:2003
EUROPEAN PRESTANDARD
ENV 13381-5
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 5: Applied protection to
concrete/profiled sheet steel composite 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 13381-5:2002 E
worldwide for CEN national Members.
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SIST ENV 13381-5:2003
ENV 13381-5:2002 (E)
Contents
page
1 Scope . 4
2 Normative references. 4
3 Terms and definitions, symbols and units . 5
4 Test equipment . 7
5 Test conditions. 7
6 Test specimens. 9
7 Installation of the test construction. 13
8 Conditioning of the test construction . 13
9 Application of instrumentation. 13
10 Test procedure . 15
11 Test results. 16
12 Test report. 17
13 Assessment . 17
14 Report of the assessment . 19
15 Limits of applicability of the results of the assessment. 20
Annex A (normative) Test method to the smouldering fire or slow heating curve. 27
Annex B (normative) Measurement of properties of fire protection materials . 29
Bibliography . 32
2
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SIST ENV 13381-5:2003
ENV 13381-5:2002 (E)
Foreword
This document ENV 13381-5:2002 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 by the European 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 6: Applied protection to concrete filled hollow steel composite columns.
Part 7: Applied protection to timber members.
Annexes A and B are normative.
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.
3
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SIST ENV 13381-5:2003
ENV 13381-5:2002 (E)
1Scope
This European Prestandard specifies a test method for determining the contribution of fire protection systems to the
fire resistance of structural concrete/profiled sheet steel composite members or slabs. The concrete can be
lightweight, normal-weight or heavy-weight concrete and of strength classes 20/25 (LC/C/HC) to 50/60 (LC/C/HC).
The method is applicable to all fire protection systems used for the protection of such structural composite members
or slabs and includes sprayed fire protection, coatings, cladding protection systems and multi-layer or composite
fire protection materials.
The test method and its assessment procedure are designed to permit direct application of the results to cover a range
of thicknesses of the applied fire protection material.
The test method is only applicable to fire protection systems which are fixed directly to the underside of the
concrete/steel composite member or slab. Fire protection systems where the fire protection material is not attached
directly to the composite member, leading to a continuous cavity between the concrete/steel composite member and
the fire protection system of size greater than 5 mm is the subject of ENV 13381-1.
This European Prestandard contains the fire test which specifies the tests which shall be carried out to determine
the ability of the fire protection system to remain coherent and fixed to the composite member and to provide data
on the temperatures of the steel sheet, throughout the depth of the concrete (for extended application purposes) and
the unexposed surface of the concrete, 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 concrete/steel composite members in accordance with the procedures
given in ENV 1994-1-2.
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 steel/concrete composite structures, steel types and
thicknesses, concrete densities, strengths, thicknesses and production techniques 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 206-1 Concrete - Part 1: Specification, performance, production and conformity.
4
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SIST ENV 13381-5:2003
ENV 13381-5:2002 (E)
ENV 10080 Steel for the reinforcement of concrete - Weldable ribbed reinforcing steel B 500 -
Technical delivery conditions for bars, coils and welded fabric.
EN 10147 Continuously hot-dip zinc coated structural steels strip and sheet - Technical delivery
conditions.
ENV 1992-1-1 Eurocode 2: Design of concrete structures
Part 1-1: General rules and rules for buildings.
ENV 1994-1-1:1992 Eurocode 4: Design of composite steel and concrete structures
Part 1-1: General rules and rules for buildings.
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 Prestandard, the terms and definitions given in EN 1363-1, EN ISO 13943, ISO 8421-2
and EN 206-1, together with the following, apply.
3.1.1
concrete/steel composite member or slab (generally referred to as slab)
element of building construction which is loadbearing and is fabricated from a profiled steel sheet lower surface, defined
according to EN 10147, and a concrete upper layer, defined according to EN 206-1. It may contain steel reinforcing bars
3.1.2
fire protection material
any material or combination of materials applied to the surface of a concrete/steel composite slab for the purpose of
increasing its fire resistance
3.1.3
passive fire protection materials
materials which do not change their physical form on heating, providing fire protection by virtue of their physical or thermal
properties. They may include materials containing water which, on heating, evaporates 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 provides 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 the structural concrete/steel composite slab
3.1.6
fire protection
protection afforded to the concrete/steel composite slab by the fire protection system such that the temperature throughout
the depth of the structural slab and upon any steel reinforcing bars within it is limited throughout the period of exposure to
fire
5
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SIST ENV 13381-5:2003
ENV 13381-5:2002 (E)
3.1.7
test specimen
concrete/steel composite test slab plus the fire protection system under test
3.1.8
fire protection thickness
thickness of a single layer fire protection system or combined thickness of all layers of a multilayer fire protection system
3.1.9
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
3.1.10
equivalent thickness of concrete
theoretical thickness of concrete which provides the same thermal insulation for a given period of test as does the given
thickness of the applied fire protection system
3.1.11
limiting exposure time
time at which the adherence of a fire protection system to the concrete/steel composite test slab can be no longer considered
acceptable, as indicated by a defined, significant increase in maximum recorded temperature at any point on the steel surface
3.1.12
limiting temperature
maximum value of temperature reached on the lower surface of the ribs of the profiled steel sheet when the limiting exposure
time is reached
3.2 Symbols and units
Symbol Unit Designation.
L mm Length of the test specimen exposed to the furnace.
exp
L mm Centre to centre distance between the supports of the test specimen.
sup
L mm Total length of the test specimen.
spec
W mm Width of test specimen exposed to the furnace.
exp
h mm Thickness of concrete in concrete/steel composite test specimen.
(h = depth of concrete above the steel ribs and h = depth of concrete within
1 2
the steel profile. Thickness h = h + h
1 2
l mm Length of the components of the trapezoidal or re-entrant profile of the steel
p
sheet (l , l and l )
p1 p2 p3
P kN Loading applied to concrete/steel composite test specimen.
( ) °C Limiting temperature.
m,l m,u
h mm the effective thickness of the concrete/steel composite test slab.
eff
h mm the equivalent effective thickness of the concrete/steel composite test slab.
e
h mm the equivalent thickness of concrete corresponding to the particular thickness
eq
of the fire protection system tested.
6
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SIST ENV 13381-5:2003
ENV 13381-5:2002 (E)
t min The time at which an increase of the characteristic temperature of all
r
thermocouples on the unexposed concrete surface of 140 °C (or a maximum
of 180 °C from a single thermocouple) is recorded.
f N/mm² Yield strength of steel.
y
d mm Thickness of fire protection material.
p
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 along the length and width of the test specimen.
The loading equipment shall not inhibit the free movement of air above the test specimen and no part of the loading
equipment, other than at the loading points, shall be closer than 60 mm to the unexposed surface of the test
specimen.
5 Test conditions
5.1 General
Test specimens, subjected to predefined loading, are heated upon a furnace under specified temperature/time
conditions, in horizontal orientation, with fire exposure applied from below.
Tests are carried out on a loaded large size test slab and an unloaded small size test slab to provide information on:
- the temperature of the profiled steel sheet behind the fire protection system;
- the behaviour of the fire protection system and its stickability;
- the temperature of the unexposed side of the test specimen;
- the temperature throughout the concrete (optional for extended application purposes).
It is recommended that the test be continued until the temperature of the exposed profiled steel surface reaches a
mean value of at least 400 °C, (or any single maximum value of 500 °C is recorded), to give the necessary
information on the stickability of the fire protection system. These temperatures may be modified if requested by
the sponsor.
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SIST ENV 13381-5:2003
ENV 13381-5:2002 (E)
If the recommended termination temperatures are not reached after 6 hours test duration the test shall normally be
terminated.
The procedures given in EN 1363-1 and EN 1363-2 (if relevant) shall be followed in the performance of this test
method unless specific contrary instruction is given.
5.2 Support and restraint conditions
5.2.1 Standard conditions
The concrete/steel composite slab test specimens shall be tested as a simply supported one way structure with two
free edges and an exposed surface and span as specified in 6.3.
The concrete/steel composite slab test specimens shall be installed onto the furnace to allow freedom for
longitudinal movement and deflection using at one side rolling support(s) and at the other hinge support(s).
The surface of the bearings shall be smooth concrete or steel plates. The width of the bearings shall be the minimum
representative of practice.
5.2.2 Other support and restraint conditions
If the support and restraint conditions differ from the standard conditions specified in 5.2.1, these conditions shall
be described in the test report and the validity of the test results will be restricted to those tested.
5.3 Loading conditions
Loading shall be applied to the full size test specimens.
The magnitude and distribution of the load shall be such that the moment caused by the applied load (P) taking
account of the dead weight of the specimen (measured or derived from samples of the components, see 6.5.1) and
the weight of load distribution plates or beams represents 60 % of the design moment resistance according to
equation 7.5 (b) of ENV 1994-1-1:1992.
The design moment resistance shall be calculated from the nominal material properties of the particular profiled
steel sheet and the actual properties of the concrete used.
If the calculated load, when first applied, causes a deformation, at normal temperature, exceeding L /250 then it
sup
shall be reduced until this criterion is met.
The load shall be symmetrically applied to the test specimen along two transverse loading lines, each one at a
distance (L /4) from each of the supports. The proportion of the total load applied at each loading position shall
sup
be P/2, as specified in Figure 1. The load shall produce stresses approximating to a uniformly distributed load.
Point loads shall be transferred to the test specimen through load distribution beams or plates (see Figure 1a)).
The total contact area between these and the concrete surface of the test specimen shall be as specified in
EN 1363-1, provided that the load distribution beam or plate chosen has a flexural rigidity large enough to give the
required distribution of the load.
Load distribution beams, for safety reasons, shall have a height to width ratio of < 1.
If the load distribution beams or plates are of steel or other high conductivity material, they shall be insulated from
the concrete surface of the test specimen by a suitable thermal insulation material.
Unexposed surface thermocouples shall not be closer than 100 mm to any part of the load distribution system as
shown in Figure 1a).
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SIST ENV 13381-5:2003
ENV 13381-5:2002 (E)
6 Test specimens
6.1 Number of test specimens
At least one loaded full size concrete/steel composite test slab with the maximum thickness of applied fire protection
system and one unloaded small size concrete/steel composite test slab with the minimum thickness of applied fire
protection system shall be tested. If the fire protection system is only available in one thickness, the full size loaded
test only shall be carried out, at that thickness and the applicability of the result restricted.
Additional small scale tests (one test per variable) may be carried out to provide further test data for the fire
protection system when:
- it is to be applied to a concrete/steel composite member of composite thickness less than that specified in this
test method;
- it is to be applied at intermediate fire protection thicknesses between maximum and minimum thickness;
- the test is carried out to the smouldering curve, in which case a small size test slab with both maximum and
minimum thickness of applied fire protection material shall be tested, according to annex A.
6.2 Size of test specimens
The size of the test specimens shall be as specified in Table 1 and exemplified in Figure 1.
6.3 Construction of test specimens
6.3.1 Construction of concrete/steel composite test slabs
The concrete/steel composite test slabs shall comprise a trapezoidal or re-entrant steel profile plus concrete of
thickness h given in Table 1, over the upper ribs of the profiled steel sheet. The concrete shall contain prefabricated
1,
welded steel mesh, and may also include additional reinforcing bars.
The welded steel mesh, placed towards the unexposed surface in both small and large test slabs shall comprise
2
4,0 mm diameter ribbed bars such that the area of reinforcing steel bars is (70 to 100) mm per metre of width of
the concrete/steel composite test element.
The position of the welded steel mesh with respect to the exposed steel and unexposed concrete surfaces shall be
ensured by the use of spacers, either plastic or concrete, such that the concrete cover obtained is (20,0 ± 2,0) mm.
For large test slabs, only, a second welded steel mesh, laid on the surface of the upper ribs of the profiled steel sheet
shall be used. It shall comprise 6,0 mm diameter ribbed bars such that the area of reinforcing steel bars is
2
(70 to 100) mm per meter of width of the concrete/steel composite test element.
The actual position of the main reinforcing bars at the exposed and unexposed surfaces shall be accurately measured
and recorded after the test at the positions of the thermocouples specified under 9.3. This shall be achieved by
cutting the composite slab into at least two pieces through or close to the required positions.
Lifting hooks may be incorporated into the composite slab. These should be of sufficient number and location to
avoid longitudinal and transverse moments. Alternatively, the composite slabs should be supported on steel beams
for lifting purposes.
Fixtures to which hangers may be attached may be provided on the unexposed side in order to avoid the collapse
of the test specimen during the test, especially where the test is continued beyond the recommended termination
9
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SIST ENV 13381-5:2003
ENV 13381-5:2002 (E)
temperature of 400 °C.
Table 1 - Sizes of test specimens
small test specimen large test specimen
1)
Exposed length (mm) L‡ 1 300‡ 3 000
exp
1)
Span (mm) L‡ 1 500‡ 3 200
sup
2) 2)
[(L + 200) > L < (L + 400)] [(L + 200) > L < (L + 400)]
exp sup exp exp sup exp
Length (mm) L‡ 1 700‡ 3 400
spec
3) 3)
[(L + 400) > L < (L + 700) ] [(L + 400) > L < (L + 700)]
exp sup exp exp sup exp
Exposed width (mm) W ‡ 1 000‡ 2 000
exp
Thickness h = [h + h2] [(50 ± 5) + height of ribs (h )] [(60 ± 5) + height of ribs (h )]
1 2 2
(mm)
Position of loading points from none L /4
sup
support points (symmetrically distributed)
1)
a span of 3 000 mm is mainly valid for trapezoidal decking with height of ribs of 50/60 mm and steel thickness of 1 mm.
2)
the distance between the exposed part of the test specimen and the supports shall be kept as small as possible. For tests of short duration (less
than 240 min) a distance of 100 mm at either end is recommended. For tests of longer duration, this can be increased to 200 mm at either end,
to protect the test equipment from heat damage.
3)
the additional length beyond the supports, required for installation purposes, shall be kept as small as it is practically possible.
6.3.2 Fabrication of concrete/steel composite slab test members
Composite slab test members shall be prepared in a smooth surfaced framework made from steel or timber. To
facilitate release of the edges of the slab from the framework, soluble oils or emulsions shall preferably be used,
although wax, non-soluble oil or non-soluble emulsions may be used. The actual material used for this purpose shall
be detailed in the test report.
6.3.3 Application of the fire protection system to the composite test slab
The steel surface of the composite test element shall be prepared as in practice. The surface of the steel face of the
concrete/steel composite test slab shall normally be dried prior to the application of the fire protection system.
The fire protection system shall be uniformly applied to the test specimen, as in practice, including any required
fixing aids and in the same manner for both maximum and minimum thickness.
The fire protection material shall extend over the full exposed surface of the concrete/steel composite test slab and
be applied prior to the application of the test load (if any).
Where a fire protection system creates small cavities between the concrete/steel composite test element and the fire
protection material, the ends shall be sealed with fire resistant material to prevent any flow of hot gases out of the
cavities.
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SIST ENV 13381-5:2003
ENV 13381-5:2002 (E)
Board type fire protection systems shall include joints in accordance with the following criteria:
Large size test specimen: At least one longitudinal joint shall be situated on the longitudinal axis and at least one
transverse joint positioned not further than 500 mm from the transverse axis.
Small size test specimen: At least one longitudinal joint shall be situated on the longitudinal axis and at least one
transverse joint positioned not further than 100 mm from the transverse axis.
6.4 Composition of test specimen component materials
6.4.1 Profiled steel sheet
The steel used shall be of grade between Fe E 280G and Fe E 350G as defined in EN 10147. The thickness of the
steel sheet will normally be from (0,7 to 1,0) mm.
6.4.2 Concrete
The concrete in the test specimen shall normally be of type 25/30 to 30/37 [LC/C/HC - (light-weight, normal-weight
or heavy-weight concrete) according to EN 206-1 and ENV 1992-1-1], although other grades within the strength
range 20/25 to 50/60 may be used.
The applicability of the results of the assessment arising from the testing of a particular density, strength or thickness
of concrete will be restricted according to 15.5, 15.6 and 15.8.
The concrete shall be prepared from silicious aggregates, of maximum aggregate size of 20 mm, and portland
cement. The composition and properties of the concrete used, shall be appropriate to those defined in EN 206-1 and
ENV 1992-1-1.
Other non-silicious and lower density aggregates may be permitted, but the applicability of the results of the
assessment will be restricted according to 15.7.
The consistency of the wet concrete shall allow for good compaction and a smooth surface. The consistency shall
be of type S3 or F3 determined in accordance with EN 206-1.
6.4.3 Steel reinforcement
The steel reinforcement bars used shall be ribbed and shall be of grade B500 (to ENV 180) or comparable European
2
Standard grade (see ENV 10080) with f = 500 N/mm . The permitted tolerances on the dimensions of reinforcing
y
bars are given in ENV 10080.
6.4.4 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 b
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