EN 1168:2005+A1:2008

SLOVENSKI STANDARD
01-julij-2008
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SIST EN 1168:2005
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Precast concrete products - Hollow core slabs
Betonfertigteile - Hohlplatten
Produits préfabriqués en béton - Dalles alvéolées
Ta slovenski standard je istoveten z: EN 1168:2005+A1:2008
ICS:
91.060.30 Stropi. Tla. Stopnice Ceilings. Floors. Stairs
91.100.30 Beton in betonski izdelki Concrete and concrete
products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 1168:2005+A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2008
ICS 91.060.30; 91.100.30 Supersedes EN 1168:2005
English Version
Precast concrete products - Hollow core slabs
Produits préfabriqués en béton - Dalles alvéolées Betonfertigteile - Hohlplatten
This European Standard was approved by CEN on 1 July 2004 and includes Amendment 1 approved by CEN on 14 January 2008.

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. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.

This European Standard exists 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.

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. EN 1168:2005+A1:2008: E
worldwide for CEN national Members.

Contents
The numbering of clauses is strictly related to EN 13369: Common rules for precast concrete products, at least for
the first three digits. When a clause of EN 13369 is not relevant or included in a more general reference of this
standard, its number is omitted and this may result in a gap on numbering.
Foreword.3
Introduction .5
1 Scope .6
2 Normative references .6
3 Terms and definitions .7
4 Requirements.8
5 Test methods.20
6 Evaluation of conformity.21
7 Marking .21
8 Technical documentation .21
Annex A (normative)  Inspection schemes .22
Annex B (informative) Typical shapes of joints .24
Annex C (informative)  Transverse load distribution.26
Annex D (informative)  Diaphragm action.34
Annex E (informative)  Unintended restraining effects and negative moments .35
Annex F (informative)  Mechanical resistance in case of verification by calculation: shear capacity of
composite members.38
Annex G (informative)  Resistance to fire .41
Annex H (informative) Design of connections.44
Annex J (normative) !!!!Full scale test.46
Annex Y (informative) Choice of CE marking method.51
Annex ZA (informative) Clauses of this European Standard addressing essential requirements or
other provisions of EU Directives.52
Bibliography .63

Foreword
This document (EN 1168:2005+A1:2008) has been prepared by Technical Committee CEN/TC 229 “Precast
concrete products”, the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an identical text or
by endorsement, at the latest by September 2008, and conflicting national standards shall be withdrawn at the
latest by September 2008.
!This European Standard was examined by and agreed with a joint working party appointed by the Liaison
Group CEN/TC 229 – TC 250, particularly for its compatibility with structural Eurocodes."
This document includes Amendment 1 approved by CEN on 2008-01-14.
This document supersedes EN 1168:2005.
The start and finish of text introduced or altered by amendment is indicated in the text by tags ! ".
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.
CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
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 Construction Products Directives (89/106/EEC) of
the European Union (EU).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.
This standard is one of a series of product standards for precast concrete products.
For common aspects reference is made to EN 13369: Common rules for precast products, from which also the
relevant requirements of the EN 206-1: Concrete - Part 1: Specification, performances, production and conformity
are taken.
The references to EN 13369 by CEN/TC 229 product standards are intended to make them homogeneous and to
avoid repetitions of similar requirements.
Eurocodes are taken as a common reference for design aspects. The installation of some structural precast
concrete products is dealt with by ENV 13670-1: Execution of concrete structures – Part 1: Common rules, which
has at the moment the status of an European Prestandard. In all countries it can be accompanied by alternatives
for national application and it shall not be treated as a European standard.
The programme of standards for structural precast concrete products comprises the following standards, in some
cases consisting of several parts:
 !EN 1168:2005+A1", Precast concrete products – Hollow core slabs
 !EN 12794:2005+A1", Precast concrete products – Foundation piles
 EN 12843, Precast concrete products – Masts and poles
 !EN 13224:2004+A1", Precast concrete products – Ribbed floor elements
 EN 13225, Precast concrete products – Linear structural elements
 EN 13693, Precast concrete products – Special roof elements
 !EN 13747", Precast concrete products – Floor plates for floor systems
 !EN 13978-1, Precast concrete products - Precast concrete garages - Part 1: Requirements for reinforced
garages monolithic or consisting of single sections with room dimensions"
 !EN 14843", Precast concrete products - Stairs
 !EN 14844", Precast concrete products – Box culverts
 !EN 14991", Precast concrete products – Foundation elements
 !EN 14992, Precast concrete products – Wall elements"
 !prEN 15037, Precast concrete products - Beam-and-block floor systems"
 prEN 15258, Precast concrete products – Retaining wall elements
 !EN 15050", Precast concrete products – Bridge elements
This standard defines in Annex ZA the application methods of CE marking to products designed using the relevant
EN Eurocodes (EN 1992-1-1 and EN 1992-1-2). Where, in default of applicability conditions of EN Eurocodes to the
works of destination, design Provisions other than EN Eurocodes are used for mechanical strength and/or fire
resistance, the conditions to affix CE marking to the product are described in ZA.3.4.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: 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.
Introduction
The evaluation of conformity given in this standard refers to the completed precast elements which are supplied to
the market and covers all the production operations carried out in the factory.
For design rules reference is made to EN 1992-1-1. Additional complementary rules are provided where necessary.
The verification of the mechanical resistance of hollow core slabs is, at this stage of standardisation, only fully
accepted by calculation; in Annex J (Normative) a test method is given for confirmation of design model for shear
resistance.
Special rules for structures with hollow core elements are presented in annexes about load distribution (Annex C),
diaphragm action (Annex D), negative moments (Annex E), shear capacity of composite members (Annex F) and
design of connections (Annex H).
Because of some specialities of the product, e.g. the absence of transverse reinforcement, some complementary
design rules to EN 1992-1-1 are necessary. Furthermore, research on hollow core slabs has resulted in special,
widely used, design rules which are not incorporated in the design rules of EN 1992-1-1. According to
subclause 1.2 of EN 1992-1-1:2004 the complementary rules, given in informative annexes in this standard, comply
with the relevant principles given in EN 1992-1-1.
Because of the fact that the experimental evidence is mainly based on elements with limited depth and width, this
standard is applicable to elements with these limited dimensions. This limitation is not intended to prohibit the
application of elements with larger sizes, but the experience is not yet wide enough to draw up standardised design
rules.
1 Scope
This European Standard deals with the requirements and the basic performance criteria and specifies minimum
values where appropriate for precast hollow core slabs made of prestressed or reinforced normal weight concrete
according to EN 1992-1-1:2004.
This European Standard covers terminology, performance criteria, tolerances, relevant physical properties, special
test methods, and special aspects of transport and erection.
Hollow core elements are used in floors, roofs, walls and similar applications. In this European Standard the
material properties and other requirements for floors and roofs are dealt with; for special use in walls and other
applications, see the relevant product standards for possible additional requirements.
The elements have lateral edges provided with a longitudinal profile in order to make a shear key for transfer of
vertical shear through joints between contiguous elements. For diaphragm action the joints have to function as
horizontal shear joints.
The elements are manufactured in factories by extrusion, slipforming or mouldcasting.
The application of the standard is limited for prestressed elements to a maximum depth of !500" mm and a
maximum width of 1 200 mm. For reinforced elements the maximum depth is limited to 300 mm and the maximum
width without transverse reinforcement to 1 200 mm and with transverse reinforcement to 2 400 mm.
The elements may be used in composite action with an in situ structural topping cast on site.
The applications considered are floors and roofs of buildings, including areas for vehicles in the category F and G
of EN 1991-2 which are not subjected to fatigue loading. For building in seismic zones additional provisions are
given in EN 1998-1.
This European Standard does not deal with complementary matters. E.g. the slabs should not be used in roofs
without additional protection against water penetration.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references,
only the edition cited applies. For undated references, the latest edition of the referenced document (including any
amendments) applies.
EN 206-1:2000, Concrete – Part 1: Specification, performance, production and conformity
EN 1992-1-1:2004,
...