oSIST prEN 13224-2:2020

Precast concrete products - Ribbed floor elements - Part 2: Specifications

This document identifies the requirements, the basic performance criteria and evaluation of conformity for precast ribbed elements made of reinforced or prestressed normal weight or light weight concrete, used in floors or roofs. The elements consist of a top and/or bottom slab and one or more (usually two) ribs; transverse ribs may also be present. The concrete does not contain more than 1 % of homogeneously distributed organic material, by mass or by volume (whichever is the most onerous).
Some examples of precast elements considered in this document are shown in Annex A.
Specific requirements for minor floor elements are listed in Annex B.
This document covers terminology, performance criteria, tolerances, relevant physical properties, test methods and aspects of transport and erection.
This document does not cover load-bearing capacity determined by testing.

Betonfertigteile - Deckenplatten mit Stegen - Teil 2: Eigenschaften

Dieses Dokument legt die Anforderungen, die grundlegenden Leistungskriterien und die Verfahren zur Konformitätsbewertung für vorgefertigte Deckenplatten mit Stegen aus bewehrtem oder vorgespanntem Normalbeton oder Leichtbeton fest, die für Decken oder Dächer eingesetzt werden. Die Deckenplatten bestehen aus einer oberen Platte und/oder einer unteren Platte sowie einem Steg oder mehreren (üblicherweise zwei) Stegen; Querstege können ebenfalls vorhanden sein. Der Beton enthält nicht mehr als 1 % Massenanteil oder Volumenanteil gleichmäßig verteilten organischen Materials (je nachdem was ungünstiger ist).
Beispiele für vorgefertigte Deckenplatten, die in diesem Dokument behandelt werden, sind in Anhang A dargestellt.
Spezielle Anforderungen an untergeordnete Deckenplatten sind in Anhang B aufgeführt.
In diesem Dokument werden Begriffe, Leistungskriterien, Toleranzen, die maßgebenden physikalischen Eigenschaften, Prüfverfahren und Regelungen zu Transport und Montage festgelegt.
Durch Prüfung bestimmte Tragfähigkeit ist nicht Gegenstand dieses Dokumentes.

Produits préfabriqués en béton - Eléments de planchers nervurés - Partie 2 : Spécifications

La présente norme spécifie les prescriptions, les critères relatifs aux performances de base et l’évaluation de la conformité pour les éléments nervurés préfabriqués en béton de granulats courants ou légers armé ou précontraint, utilisés pour les planchers ou les toitures. Les éléments sont composés d’une dalle supérieure et/ou inférieure et d’une ou de plusieurs (généralement deux) nervures ; des nervures transversales peuvent également être présentes. Le béton ne contient pas plus de 1 % de matières organiques réparties de façon homogène (en masse ou en volume selon la valeur la plus élevée).
Quelques exemples d’éléments préfabriqués traités dans la présente norme sont donnés dans l’Annexe A.
Les prescriptions particulières pour les petits éléments de plancher sont énumérées dans l’Annexe B.
Le présent document couvre la terminologie, les critères de performance, les tolérances, les propriétés physiques pertinentes, les méthodes d’essai ainsi que des aspects relatifs au transport et à la mise en oeuvre.
Le présent document ne couvre pas la capacité portante déterminée par les essais.

Montažni betonski proizvodi - Rebraste etažne plošče - 2. del: Specifikacije

General Information

• Status: Not Published
• Public Enquiry End Date: 14-Nov-2020
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: BBB - Concrete, reinforced concrete and prestressed concrete
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 23-Sep-2020
• Due Date: 10-Feb-2021
• Completion Date: 04-Dec-2020
• Ref Project: prEN 13224-2 - Precast concrete products - Ribbed floor elements - Part 2: Specifications

Relations

• Revised: SIST EN 13224:2012 - Precast concrete products - Ribbed floor elements
• Effective Date: 01-Nov-2020

Overview - prEN 13224-2 (Precast concrete products: Ribbed floor elements - Part 2)

prEN 13224-2 is a CEN draft specification that defines requirements, basic performance criteria and conformity evaluation for precast ribbed floor elements made of reinforced or prestressed normal-weight or lightweight concrete. It applies to elements consisting of a top and/or bottom slab and one or more ribs (transverse ribs may be present). The concrete may contain no more than 1% homogeneously distributed organic material (by mass or volume). The document covers terminology, tolerances, physical properties, test methods, factory production control, and aspects of transport and erection. It does not cover load-bearing capacity determined by testing.

Key topics and technical requirements

• Scope and material limits: Reinforced or prestressed precast ribbed elements; normal or lightweight concrete; organic content ≤ 1%.
• Production and material requirements: References EN 206 for concrete constituents and EN 13369 for general precast rules; minimum strength for cast-in-situ composite top layer is C20/25.
• Finished product requirements:
  • Geometrical tolerances: skewness ±15 mm; lateral bow ±10 mm or L/1000 (whichever greater); angular deviation of ribs ±15 mm. For prestressed elements lateral bow and angular deviation may be increased by 50%. Minor floor elements have a length tolerance ±25 mm.
  • Longitudinal connections: joint top width ≥ 30 mm; tie-bar joint width ≥ 3× bar diameter; grooved joint faces to ensure grout shear resistance.
  • Concrete cover, surface, durability: follow EN 13369 clauses for protection against corrosion, surface characteristics and durability.
• Structural detailing:
  • Rules on shear reinforcement, anchorage zones for prestressing, and treatment of negative/unintended moments (Annex C).
  • Transverse load distribution and diaphragm action addressed in informative annexes (D, E, F).
• Test methods & factory production control: Measurement procedures for dimensions and surfaces follow EN 13369 with additions in this part.

Practical applications and users

This standard is essential for:

• Precast manufacturers producing ribbed floor elements (reinforced or prestressed)
• Structural engineers and designers specifying precast floor/roof systems
• Contractors, erectors and lifting/transport planners concerned with tolerances, erection loads and handling safety
• Quality managers and conformity assessment bodies implementing factory production control and test methods

Use prEN 13224-2 to ensure consistent product quality, clear contractual specifications, and safe transport/erection practices for precast ribbed floor systems.

Related standards

• prEN 13224-1: Essential characteristics (AVCP and design-related information)
• EN 13369:2018 - Common rules for precast concrete products
• EN 206 - Concrete specification and conformity
• EN 1990, EN 1992-1-1 (Eurocode basis and concrete design)

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2020
Montažni betonski izdelki - Rebraste etažne plošče - 2. del: Specifikacije
Precast concrete products - Ribbed floor elements - Part 2: Specifications
Betonfertigteile - Deckenplatten mit Stegen - Teil 2: Eigenschaften
Produits préfabriqués en béton - Eléments de planchers nervurés - Partie 2 :
Spécifications
Ta slovenski standard je istoveten z: prEN 13224-2
ICS:
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.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2020
ICS 91.100.30 Will supersede EN 13224:2011
English Version
Precast concrete products - Ribbed floor elements - Part 2:
Specifications
Produits préfabriqués en béton - Eléments de Betonfertigteile - Deckenplatten mit Stegen - Teil 2:
planchers nervurés - Partie 2 : Spécifications Eigenschaften
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 229.
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-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey 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

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13224-2:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Requirements . 6
4.1 Material requirements . 6
4.1.1 General . 6
4.1.2 Reinforcing steel . 6
4.1.3 Prestressing steel . 6
4.2 Production requirements . 6
4.2.1 General . 6
4.2.2 Shrinkage of lightweight concrete . 6
4.3 Finished product requirements . 6
4.3.1 Geometrical properties . 6
4.3.2 Surface characteristics . 8
4.3.3 Mechanical resistance . 8
4.3.4 Acoustic properties . 9
4.3.5 Thermal properties . 9
4.3.6 Other requirements . 9
4.3.7 Durability . 9
5 Test methods . 9
5.1 General . 9
5.2 Measuring of dimensions and surface characteristics . 9
6 Factory production control . 9
7 Technical documentation . 10
Annex A (informative) Examples of elements . 11
Annex B (normative) Minor floor elements. 13
B.1 General . 13
B.2 Additional requirements for minor floor elements . 13
B.2.1 General . 13
B.2.2 Dimensions . 13
B.2.3 Minimum strength of concrete . 14
B.3 Special rules for minor floor elements . 14
B.3.1 Bearing length . 14
B.3.2 Transverse load distribution . 14
B.3.3 Detailing . 15
B.3.3.1 Shear reinforcement . 15
B.3.3.2 Prestressed elements . 15
B.3.3.3 Reinforced elements . 16
Annex C (informative) Unintended negative moments . 17
Annex D (informative) Transverse load distribution . 19
Annex E (informative) Diaphragm action . 20
Annex F (informative) Relevant clauses related to structural design . 21
F.1 General . 21
F.2 Specific additional design clauses (see Table F.1) . 21
Bibliography . 22

European foreword
This document (prEN 13224-2:2020) has been prepared by Technical Committee CEN/TC 229 “Precast
concrete products”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 13224:2011.
The main changes are the splitting in two parts, the present part 2 specifying production and information
regarding design. Reference is made to part 1 for essential characteristics and AVCP provisions related
to Mandate M/100. Normative references were updated. No technical change was made.

1 Scope
This document identifies the requirements, the basic performance criteria and evaluation of conformity
for precast ribbed elements made of reinforced or prestressed normal weight or light weight concrete,
used in floors or roofs. The elements consist of a top and/or bottom slab and one or more (usually two)
ribs; transverse ribs may also be present. The concrete does not contain more than 1 % of homogeneously
distributed organic material, by mass or by volume (whichever is the most onerous).
Some examples of precast elements considered in this document are shown in Annex A.
Specific requirements for minor floor elements are listed in Annex B.
This document covers terminology, performance criteria, tolerances, relevant physical properties, test
methods and aspects of transport and erection.
This document does not cover load-bearing capacity determined by testing.
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, Concrete — Specification, performance, production and conformity
prEN 13224-1:2020, Precast concrete products — Ribbed floor elements — Part 1: Essential characteristics
EN 13369:2018, Common rules for precast concrete products
EN 1990:2002, Eurocode — Basis of structural design
EN 1992-1-1:2004, Eurocode 2: Design of concrete structures — Part 1-1: General rules and rules for
buildings
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 13224-1, EN 1992-1-1:2004
and EN 13369 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
minor floor element
ribbed precast floor elements having limited dimensions, which are in compliance with Annex B

As impacted by EN 1992-1-1:2004/AC:2010 and EN 1992-1-1:2004/A1:2014.
4 Requirements
4.1 Material requirements
4.1.1 General
For general aspects, reinforcing and prestressing steel, inserts and connectors, the relevant subclauses of
EN 13369:2018, 4.1 shall apply. For constituent materials of concrete EN 206 shall apply.
4.1.2 Reinforcing steel
EN 13369:2018, 4.1.3 shall apply.
4.1.3 Prestressing steel
EN 13369:2018, 4.1.4 shall apply.
4.2 Production requirements
4.2.1 General
The production of precast ribbed elements shall comply with the requirements in EN 13369:2018, 4.2.
NOTE In addition to EN 13369:2018, 4.2.2 for cast-in situ concrete considered to act compositely with precast
units in the structural resistance (e.g. structural top layer), the minimum strength class is C 20/25.
In particular, the compressive strength of concrete shall be considered.
For minor floor elements, strength classes shall comply with B.2.3.
4.2.2 Shrinkage of lightweight concrete
For lightweight concrete, when declared, the shrinkage shall be determined according to EN 13369:2018,
4.2.2.4 and expressed in ‰.
4.3 Finished product requirements
4.3.1 Geometrical properties
4.3.1.1 Production tolerances
Complementary to EN 13369:2018, 4.3.1.1 the following tolerances shall apply (Figure 1).
Figure 1 — Reference points for standard check of tolerances

Table 1 — Production tolerances
Dimension Permitted deviation (mm)
Skewness (θ) ± 15
Lateral bow (ε) ± 10 or L/1 000 (whichever is greater)
Angular deviation of ribs (δ) ± 15

Methods of measurements are given in 5.3.
For prestressed elements the values of tolerance in lateral bow (ε) and angular deviation of ribs (δ) can
be increased by 50 %; this includes the effect of prestressing tolerances.
For minor floor elements according to Annex B, the permitted deviation on length is ± 25 mm.
4.3.1.2 Minimum dimensions
EN 13369:2018, 4.3.1.2 shall apply.
4.3.1.3 Longitudinal connections
If the precast units are connected along their longitudinal edges by means of a cast in situ mortar or
concrete joint, the minimum joint width shall be at least 30 mm at the top to allow satisfactory casting.
The joint face shall be provided with at least one groove. The size shall be appropriate with regard to the
shear resistance of the grout.
If tie bars are to be anchored within the joint, the joint width at the tie bar level shall be at least three
times the diameter of the bar to enable a satisfactory bond and a complete encasing of the bar.
If welded connections are used, the connection devices should be designed in order to allow an easy
compensation of camber and erection deviations and welding execution.
4.3.1.4 Concrete cover
For the protection against corrosion EN 13369:2018, 4.3.7 shall apply.
For minor floor elements see Annex B.
4.3.2 Surface characteristics
EN 13369:2018, 4.3.2 shall apply.
4.3.3 Mechanical resistance
4.3.3.1 General
In Annex F, relevant clauses in this standard related to structural design are summarised.
EN 13369:2018, 4.3.3.1 to 4.3.3.5 shall apply, except 4.3.3.4.
For minor floor elements see Annex B.
For transverse distribution of loads see Annex E.
For diaphragm actions see Annex F.
4.3.3.2 Transient situations
For transient situations EN 13369:2018, 4.3.3.6 of shall apply.
Unless compensating devices are used during lifting, each suspension point should be verified on the
basis that only two are being active.
In the erection phases in which the access of workers on the elements can be expected, the construction
loads of EN 1991-1-6 shall be considered and the supports for safety devices shall withstand the
appropriate horizontal force, placed in the most unfavourable position of the upper side of the protection
rail.
4.3.3.3 Shear reinforcement
It is allowed to omit the transversal shear reinforcement where it is not required by the resistance to
loads or fire verification provided adjacent units are connected.
At least the minimum shear reinforcement according to EN 1992-1-1:2004, 9.2.2 shall be provided in the
anchorage zone of prestressing tendons, unless a greater area is required by the relevant verification.
This minimum shear reinforcement is not required for ribbed elements used for roofs, provided the
spalling stress in the webs is lower than the tensile strength of concrete at t
...