Steel for the reinforcement of concrete - Weldable reinforcing steel - General

This document specifies general requirements and definitions for the performance characteristics of weldable reinforcing steel used for the reinforcement of concrete structures, delivered as finished products in the form of:
-   bars, coils (rod, wire) and de-coiled products;
-   sheets of factory-made machine-welded fabric;
-   lattice girders.
1.2   Steels according to this document have a ribbed, indented or smooth surface.
1.3   This document does not apply to:
-   non-weldable reinforcing steel;
-   galvanized reinforcing steel;
-   epoxy-coated reinforcing steel;
-   corrosion resistant reinforcing steel;
-   prestressing steels (see prEN 10138-1 to -4);
-   indented strip;
-   further processing, e.g. cutting or cutting and bending.

Stahl für die Bewehrung von Beton - Schweißgeeigneter Betonstahl - Allgemeines

1.1 Diese Europäische Norm legt allgemeine Anforderungen und Definitionen für die Leistungsmerkmale
von schweißgeeignetem Betonstahl fest, der für die Bewehrung von Betonbauwerken verwendet und als
Fertigerzeugnis geliefert wird in Form von
.Stäben, Ringen (Walzdraht, Draht) und abgewickelten Erzeugnissen;
.werkmäßig gefertigten maschinell geschweißten Matten;
.Gitterträgern.
1.2 Stähle nach dieser Europäischen Norm haben eine gerippte, profilierte oder glatte Oberfläche.
1.3 Diese Europäische Norm gilt nicht für
.nicht schweißgeeigneten Betonstahl;
.verzinkten Betonstahl;
.epoxibeschichteten Betonstahl;
.korrosionsbeständigen Betonstahl;
.Spannstahl (siehe prEN 10138-1 bis -4);
.profiliertes Band;
.Weiterverarbeitung, z.B. schneiden oder schneiden und biegen.

Aciers pour l'armature du béton - Aciers soudables pour béton armé - Généralités

La présente partie de cette Norme Européenne spécifie les prescriptions générales relatives aux armatures pour béton armé soudables utilisées pour  l'armature des structures en béton dans trois catégories de ductilité A,B et C,livrées sous la forme de: -barres et couronnes(fil,fil machine) pour utilisation directe ou comme éléments pour la fabrication des treillis soudés ou treillis raidisseurs. -panneaux de treillis soudés fabriqués en usine sur machine -treillis raidisseurs;

Jeklo za armiranje betona – Varivo armaturno jeklo - Splošno

General Information

Status
Published
Publication Date
24-May-2005
Current Stage
9092 - Decision on results of review/2YR ENQ - revise - Review Enquiry
Due Date
28-Oct-2009
Completion Date
28-Oct-2009

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Jeklo za armiranje betona – Varivo armaturno jeklo - SplošnoStahl für die Bewehrung von Beton - Schweißgeeigneter Betonstahl - AllgemeinesAciers pour l'armature du béton - Aciers soudables pour béton armé - GénéralitésSteel for the reinforcement of concrete - Weldable reinforcing steel - General77.140.15Jekla za armiranje betonaSteels for reinforcement of concreteICS:Ta slovenski standard je istoveten z:EN 10080:2005SIST EN 10080:2005en01-september-2005SIST EN 10080:2005SLOVENSKI

STANDARDSIST ENV 10080:19971DGRPHãþD
SIST EN 10080:2005
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 10080

May 2005 ICS 77.140.15; 77.140.60; 77.140.65 Supersedes ENV 10080:1995 English version

Steel for the reinforcement of concrete - Weldable reinforcing steel - General
Aciers pour l'armature du béton - Aciers soudables pour béton armé - Généralités

Stahl für die Bewehrung von Beton - Schweißgeeigneter Betonstahl - Allgemeines This European Standard was approved by CEN on 21 April 2005.

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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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 © 2005 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10080:2005: ESIST EN 10080:2005

EN 10080:2005 (E) 2 Contents Page Foreword..................................................................................................................................................................3 1 Scope...........................................................................................................................................................4 2 Normative references.................................................................................................................................4 3 Terms and definitions.................................................................................................................................5 4 Symbols.......................................................................................................................................................8 5 Designation...............................................................................................................................................10 5.1 Bar, coil and de-coiled product................................................................................................................10 5.2 Welded fabric............................................................................................................................................10 5.3 Lattice girders...........................................................................................................................................12 6 Steelmaking and manufacturing processes...........................................................................................13 7 Performance characteristics....................................................................................................................13 7.1 Weldability and chemical composition...................................................................................................13 7.2 Mechanical properties..............................................................................................................................14 7.3 Dimensions, mass and tolerances...........................................................................................................17 7.4 Bond strength and surface geometry......................................................................................................20 7.5 Verification of performance characteristics............................................................................................22 8 Evaluation of conformity..........................................................................................................................22 8.1 Factory production control......................................................................................................................22 8.2 Initial type testing......................................................................................................................................25 8.3 Continuous surveillance of factory production control and audit testing............................................28 8.4 Evaluation, reporting and action..............................................................................................................30 8.5 Assessment of the long term quality level..............................................................................................31 9 Test methods.............................................................................................................................................32 9.1 Bars, coils and de-coiled products..........................................................................................................32 9.2 Welded fabric............................................................................................................................................32 9.3 Lattice girders...........................................................................................................................................33 10 Identification of the manufacturer and the technical class....................................................................33 10.1 Bar..............................................................................................................................................................33 10.2 Coil.............................................................................................................................................................35 10.3 De-coiled product......................................................................................................................................36 10.4 Welded fabric............................................................................................................................................36 10.5 Lattice girders...........................................................................................................................................36 11 Verification of mechanical properties in the case of dispute................................................................36 Annex A (informative)

Examples of weld points in lattice girder joints...........................................................37 Annex B (normative) Test methods for lattice girders........................................................................................38 Annex C (informative)

Bond test for ribbed and indented reinforcing steel – Beam test...............................44 Annex D (informative)

Bond test for ribbed and indented reinforcing steel – Pull-out test............................54 Annex E (informative)

Comparison of symbols used in this European Standard with those used in EN 1992-1-1 and EN 1992-1-2.........................................................................................................................61 Annex ZA (informative)

Clauses of this European Standard addressing the provisions of the EU Construction Products Directive.............................................................................................................62

SIST EN 10080:2005
EN 10080:2005 (E) 3

Foreword This document (EN 10080:2005) has been prepared by Technical Committee ECISS/TC 19 “Concrete reinforcing and pre-stressing steels - Properties, dimensions, tolerances and specific tests”, the secretariat of which is held by DIN. 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 November 2005, and conflicting national standards shall be withdrawn at the latest by May 2007. This document has been prepared under Mandate M/115 given to CEN by the European Commission and the European Free Trade Association and supports essential requirements of the EU Construction Products Directive (89/106/EEC). For relationship with the EU Construction Products Directive, see informative Annex ZA, which is an integral part of this document. This document does not apply to non-weldable reinforcing steel. This document does not define technical classes. Technical classes should be defined in accordance with this document by specified values for Re, Agt, Rm/Re, Re,act./Re,nom. (if applicable), fatigue strength (if required), bendability, weldability, bond strength, strength of welded or clamped joints (for welded fabric or lattice girders) and tolerances on dimensions. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

SIST EN 10080:2005

EN 10080:2005 (E) 4 1 Scope 1.1 This European Standard specifies general requirements and definitions for the performance characteristics of weldable reinforcing steel used for the reinforcement of concrete structures, delivered as finished products in the form of:  bars, coils (rod, wire) and de-coiled products;  sheets of factory-made machine-welded fabric;  lattice girders. 1.2 Steels according to this European Standard have a ribbed, indented or smooth surface. 1.3 This European Standard does not apply to:  non-weldable reinforcing steel;  galvanized reinforcing steel;  epoxy-coated reinforcing steel;  corrosion resistant reinforcing steel;  prestressing steels (see prEN 10138-1 to -4);  indented strip;  further processing, e.g. cutting or cutting and bending. 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 10020:2000, Definition and classification of grades of steel EN 10079:1992, Definition of steel products EN ISO 377, Steel and steel products — Location and preparation of samples and test pieces for mechanical testing (ISO 377:1997) EN ISO 7500-1, Metallic materials — Verification of static uniaxial testing machines — Part 1: Tension / compression testing machines — Verification and calibration of the force-measuring system (ISO 7500-1:2004) EN ISO 15630-1, Steel for the reinforcement and prestressing of concrete — Test methods — Part 1: Reinforcing bars, wire rod and wires (ISO 15630-1:2002) EN ISO 15630-2, Steel for the reinforcement and prestressing of concrete — Test methods — Part 2: Welded fabric (ISO15630-2:2002)

NOTE
See also C.2 and D.2. SIST EN 10080:2005

EN 10080:2005 (E) 5 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in EN 10020:2000 and EN 10079:1992 and the following apply. 3.1

reinforcing steel steel product with a circular or practically circular cross-section which is suitable for the reinforcement of concrete 3.2

ribbed reinforcing steel reinforcing steel with at least two rows of transverse ribs, which are uniformly distributed over the entire length 3.3

longitudinal rib uniform continuous protrusion parallel to the axis of the bar, rod or wire 3.4

transverse rib any rib on the surface of the bar, rod or wire other than a longitudinal rib 3.5

rib height, h distance from the highest point of the rib (transverse or longitudinal) to the surface of the core, to be measured normal to the axis of the bar, rod or wire 3.6

rib or indentation spacing, c distance between the centres of two consecutive transverse ribs or two consecutive indentations measured parallel to the axis of the bar, rod or wire 3.7

angle of transverse rib or indentation inclination, ß angle between the axis of the transverse rib or indentation and the longitudinal axis of the bar, rod or wire 3.8

transverse rib flank inclination, αααα angle of the rib flank measured perpendicular to the longitudinal axis of the rib 3.9

relative rib area, fR area of the projection of all ribs on a plane perpendicular to the longitudinal axis of the bar, rod or wire, divided by the rib spacing and the nominal circumference 3.10

indented reinforcing steel reinforcing steel with defined indentations uniformly distributed over the entire length 3.11

indentation depth, t distance between the surface of the wire and the deepest point of the indentation 3.12

indentation width, b width of the indention to be measured parallel to the axis of the bar, rod or wire 3.13

plain reinforcing steel reinforcing steel with a smooth surface SIST EN 10080:2005

EN 10080:2005 (E) 6 3.14

coil single length of reinforcing steel (usually rod or wire) wound in concentric rings 3.15

de-coiled product reinforcing steel manufactured in coils and subsequently straightened for further processing 3.16

nominal cross-sectional area, An cross-sectional area equivalent to the area of a circular plain bar of the same nominal diameter, d (i.e.42dπ) 3.17

welded fabric arrangement of longitudinal and transverse bars, rods or wires of the same or different nominal diameter and length that are arranged substantially at right angles to each other and factory electrical resistance welded together by automatic machines at all points of intersection 3.18

lattice girder two or three-dimensional metallic structure comprising an upper chord, one or more lower chords and continuous or discontinuous diagonals which are welded or mechanically assembled to the chords 3.19

characteristic value value of a material or product property having a prescribed probability of not being attained in a hypothetical unlimited test series NOTE

This value generally corresponds to a specific fractile of the assumed statistical distribution of the particular property of the material or product. 3.20

minimum value value below which no test result shall fall 3.21
maximum value value which no test result shall exceed 3.22

batch quantity of bars, rods, wires or decoiled products of one nominal diameter and one cast either in coils or bars or any quantity of welded fabric or lattice girders of one type produced by one manufacturer and presented for examination at any one time 3.23

factory production control permanent internal control of production performed by the manufacturer 3.24

semi-finished product product which requires further processing in order to achieve the standard and special properties specified in this document for reinforcing steels 3.25

standard property property which is contained in this document as part of the factory production control requirements for every test unit SIST EN 10080:2005

EN 10080:2005 (E) 7 3.26

special property property contained in this document which is not determined as part of the factory production control requirements for every test unit 3.27

standard welded fabric welded fabric manufactured according to specified delivery conditions and available from stock 3.28

purpose made welded fabric welded fabric manufactured according to user's specific requirements 3.29

longitudinal wire reinforcing steel in the manufacturing direction of the welded fabric 3.30

transverse wire reinforcing steel perpendicular to the manufacturing direction of the welded fabric 3.31

twin wires two wires of the same technical class and nominal diameter placed adjacent to each other as a pair in welded fabrics 3.32

pitch of welded fabric centre-to-centre distance of wires in a sheet of welded fabric NOTE

For twin wire fabric the pitch is measured between the tangents of the adjacent wires. 3.33

overhang of welded fabric, u1, u2, u3, u4 length of longitudinal or transverse wires projecting beyond the centre of the outer crossing wire in a sheet of welded fabric NOTE

For twin wire welded fabric the overhang is measured from the tangent line of the adjacent wires. 3.34

length of a welded fabric sheet, L dimension of the longest side of a sheet of welded fabric, irrespective of the manufacturing direction 3.35

width of a welded fabric sheet, B dimension of the shortest side of the sheet of welded fabric, irrespective of the manufacturing direction 3.36

standard lattice girder lattice girder manufactured according to specified delivery conditions and available from stock 3.37

purpose made lattice girder lattice girder manufactured according to user's specific requirements 3.38

lower chord set of longitudinal reinforcing steels placed in the lower part of a lattice girder NOTE

The constituent longitudinal reinforcing steels of the lower chord can be interlinked or not. SIST EN 10080:2005

EN 10080:2005 (E) 8 3.39

upper chord longitudinal reinforcement placed in the upper part of a lattice girder, of which the base steel is either a reinforcing steel or a steel strip 3.40

diagonals reinforcing steels linking the upper and lower chord of a lattice girder NOTE

They form harmonic curves in the case of continuous diagonals or are independent elements in the case of discontinuous diagonals. 3.41

lattice girder length, L overall length of a lattice girder 3.42

design height of a lattice girder, H1 distance between the lowest point of the lower chord and the highest point of the upper chord 3.43

overall height of a lattice girder, H2 distance between the lowest point and the highest point of a lattice girder 3.44

lattice girder overhang, u1,u2 length of the diagonals beyond either the upper chord (u1) or the lower chord (u2) 3.45

design width of a lattice girder, B1 distance between the outlying points of the lower chords 3.46

overall width of a lattice girder, B2 distance between the outlying points of a lattice girder 3.47

pitch of diagonals, Ps distance between equivalent consecutive junction points of the diagonals with the chords 3.48

angle of inclination of diagonals, ϑϑϑϑ angle between the axis of a diagonal and the longitudinal axis of a lattice girder in the plane of the diagonal in the middle of the height of a lattice girder 3.49

technical class type of reinforcing steel defined by its performance characteristics, identified by a unique product number 3.50

reinforcing steel grade steel grade defined by its characteristic yield strength and ductility requirements 4 Symbols Symbols used in this European Standard are listed in Table 1. NOTE

For comparison of symbols used in this European Standard with those used in EN 1992-1-1 and EN 1992-1-2 (see Annex E). SIST EN 10080:2005

EN 10080:2005 (E) 9 Table 1 — List of symbols Symbol Description Unit An Nominal cross-sectional area mm2 Agt Percentage total elongation at maximum force % b Width of indentation mm c Transverse rib or indentation spacing mm Ceq Carbon equivalent value (CEV) % by mass Cv Specified characteristic value a d Nominal diameter of the reinforcing steel mm e Gap between rib or indentation rows mm fR Relative rib area - fP Relative indentation area - h Rib height mm k Coefficient as a function of the number of test results - x Average value of test results a Re Yield strength MPa b ReH Upper yield strength MPa b Rm Tensile strength MPa b Rm/Re Ratio tensile strength/yield strength - Rp0,2 0,2 % proof strength, non proportional extension MPa b s Estimate of the standard deviation a α Transverse rib flank inclination o ß Angle of transverse rib or indentation inclination o 2σa Stress range in the axial load fatigue test MPa b σmax. Specified maximum stress in the fatigue test MPa b B Length of transverse wire in welded fabric mm dC Diameter of transverse wires in welded fabric mm dL Diameter of longitudinal wires in welded fabric mm L Length of longitudinal wire in welded fabric, or length of lattice girder mm NC Number of transverse wires in welded fabric - NL Number of longitudinal wires in welded fabric - PC Pitch of transverse wires in welded fabric mm PL Pitch of longitudinal wires in welded fabric mm Fs Shear force of welded connections in welded fabric

kN Re,act. Actual value of yield strength MPa b Re,nom. Specified value of yield strength MPa b Re, act./Re,nom. Ratio actual value of yield strength / specified value of yield strength - a1, a2, a3, a4 Increment (specified in the product specification) a u1, u2 Overhang of the longitudinal wires in welded fabric or length of the diagonals beyond the upper or lower chord of a lattice girder mm u3, u4 Overhang of the transverse wires in welded fabric mm ACh Cross-sectional area of chord mm2 ADi Cross-sectional area of diagonal mm2 B1 Design width of lattice girder mm B2 Overall width of lattice girder mm Fd Shear force of a clamped joint in lattice girder kN Fw Shear force of a single weld in lattice girder kN H1 Design height of lattice girder mm H2 Overall height of lattice girder mm Ps Pitch of diagonals of lattice girder mm Re,Ch Yield strength of the chord in lattice girder MPa b Re,Di Yield strength of the diagonal in lattice girder MPa b t Depth of indentation mm ts Thickness of metal strip in lattice girder mm ϑ Inclination of the diagonals in lattice girder o (to be continued) SIST EN 10080:2005

EN 10080:2005 (E) 10 Table 1 — List of symbols (concluded) Symbol Description Unit b Width of the beam (beam test) mm dm Bend diameter (beam test) mm Fa Total force applied (beam test) kN Fa Tension force (pull-out test) kN fc Average of concrete strength (pull-out test) MPa b fcm Target value of the concrete strength class (pull-out test) MPa b Fi Force in hinge and bar or wire (beam test) kN vp Loading rate (pull-out test) N/s ∆o Slip (pull-out test) mm σs Stress in the bar or wire (beam test) MPa b bτ Bond stress (beam test) MPa b buτ Bond stress at maximum force (beam test) MPa b dmτ Bond stress (pull-out test) MPa b 01,0τ, 1,0τ, 1τ Bond stress at 0,01 mm, 0,1 mm and 1 mm slip (beam test) MPa b a The unit depends on the property. b 1 MPa = 1 N/mm2. 5 Designation 5.1 Bar, coil and de-coiled product The products covered by this European Standard shall be designated with the following information: a) description of the product form (i.e. bar, coil, de-coiled product); b) number of this European Standard; c) nominal dimensions of the product; d) technical class. 5.2 Welded fabric Welded fabric shall be designated with the following information: a) designation of the product form (welded fabric); b) number of this European Standard; c) nominal dimensions of the product (dimensions of the wires, dimensions of the sheet, pitch of wires, overhangs); d) technical class(es) of the steel(s). NOTE 1 Brief designations are widely used to describe standard welded fabric. The relevant mesh arrangement can be seen from the tabulated data issued by the manufacturer. NOTE 2 Purpose made welded fabric can be described using the indications given in Figure 1, or by a fully dimensioned drawing, and should be identified by the user's reference. SIST EN 10080:2005

EN 10080:2005 (E) 11

Key NL number of longitudinal wires PL pitch of longitudinal wires dL diameter of longitudinal wires NC number of transverse wires PC pitch of transverse wires dC diameter of transverse wires L length of longitudinal wire B length of transverse wire u1 overhang of the longitudinal wires u2

overhang of the longitudinal wires u3 overhang of the transverse wires u4 overhang of the transverse wires Figure 1 — Geometrical characteristics of purpose made welded fabric SIST EN 10080:2005

EN 10080:2005 (E) 12 5.3 Lattice girders Lattice girders (see Figure 2) shall be designated with the following information: a) designation of the product form, and/or product name (lattice girder); b) number of this European Standard; c) design height of the lattice girder; d) nominal dimensions of the upper chord, diagonal and lower chord; e) technical class(es) of the steel(s) for the upper chord, diagonal and lower chord. NOTE Lattice girders can be described using the indications given in Figure 2, or by a fully dimensioned drawing and should be identified by the user's reference.

Figure 2a)
Figure 2b) SIST EN 10080:2005
EN 10080:2005 (E) 13

Figure 2c) Key 1 upper chord 2 diagonal 3 lower chord Figure 2 — Height (H1, H2), width (B1, B2), overhang (u1, u2) and pitch of

diagonals (Ps) of a lattice girder 6 Steelmaking and manufacturing processes 6.1 The melting process and type of de-oxidation of the steel is at the discretion of the steel producer. 6.2 The manufacturing process for the production of coils and bars is at the discretion of the manufacturer. It shall be reported to the purchaser if requested. 6.3 De-coiling of coil material shall be done by a machine made for this purpose. 6.4 The manufacture of reinforcing steel by re-rolling finished products (e.g. sheets or rails) is not permitted. 6.5 All welded fabric shall be factory made and machine welded. The joints, at the intersection of the longitudinal wires and the transverse wires, shall be made by electrical resistance welding, to provide a specified shear resistance. Welded fabric may be composed of a different technical class in each direction. Twin wire welded fabric shall be composed of twin wires in only one direction. 6.6 All lattice girders shall be factory made, and may be made from bars and coils or strip (for upper chords only). The joints between chords and diagonals shall be made by electrical resistance welding, or by mechanical clamping, to provide a specified shear resistance. 7 Performance characteristics 7.1 Weldability and chemical composition 7.1.1 Weldability is determined by two characteristics:  carbon equivalent; SIST EN 10080:2005

EN 10080:2005 (E) 14  limitations on the content of certain elements. 7.1.2 The maximum values of individual elements and the carbon equivalent shall not exceed the values given in Table 2. 7.1.3 The carbon equivalent value Ceq shall be calculated using the following formula:

Ceq = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15
(1) Where
the symbols of the chemical elements indicate their content in % by mass. NOTE

For guidance on welding of reinforcing steels see prEN ISO 17660. Table 2 — Chemical composition (% by mass)

Carbon a
max. Sulphur
max. Phosphorus
max. Nitrogen b
max. Copper

max. Carbon equivalent value a max. Cast analysis 0,22 0,050 0,050 0,012 0,80 0,50 Product analysis 0,24 0,055 0,055 0,014 0,85 0,52 a It is permitted to exceed the maximum values for carbon by 0,03 % by mass, provided that the carbon equivalent value is decreased by

0,02 % by mass. b Higher nitrogen contents are permissible if sufficient quantities of nitrogen binding elements are present. 7.1.4 Durability of products according to this European Standard is provided by the chemical composition specified in Table 2. 7.2 Mechanical properties 7.2.1 General In the context of this European Standard the characteristic value is (unless otherwise indicated) the lower or upper limit of the statistical tolerance interval at which there is a 90 % probability (1 - α = 0,90) that 95 %

(p = 0,95) or 90 % (p = 0,90) of the values are at or above this lower limit, or are at or below this upper limit respectively (see Table 16 and Table 17). This definition refers to the long term quality level of production. 7.2.2 Conditions of testing The conditions of testing shall be as specified in Table 3. SIST EN 10080:2005

EN 10080:2005 (E) 15 Table 3 — Conditions of testing the mechanical properties Manufacturing and delivery conditions of the product Conditions of testing (test pieces) Produced in straight lengths by hot rolling As delivered a or aged b Produced in straight lengths by cold working Aged b Produced as coil and delivered de-coiled Aged b Produced and delivered as coil Straightened and aged b Welded fabric Aged a, b, c Lattice girders Aged a, b, c a Aged in the case of dispute. b Aged means: Heating of the test piece to 100 °C, maintaining at this temperature

± 10 °C for a period of 1 h 015+min and then cooling in still air to room temperature. The method of heating is left to the discretion of the manufacturer. c Or as delivered when the constituents are produced in straight lengths by hot rolling. 7.2.3 Tensile properties 7.2.3.1 The specified values for the tensile properties (Re, Rm/Re, Agt, and where relevant Re,act./Re,nom.) shall be the corresponding specified characteristic value with p = 0,95 for Re, and p = 0,90 for Agt, Rm/Re, and Re,act./Re,nom.. 7.2.3.2 The values Re and Rm shall be calculated using the nominal cross-sectional area of the product. 7.2.3.3 For yield strength (Re) the upper yield strength (ReH) shall apply. If a yield phenomenon is not present, the 0,2 % proof strength (Rp0,2) shall be determined. 7.2.4 Shear force of welded or clamped joints 7.2.4.1 Welded fabric The specified value of the shear force of welded

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