8/11/2019 SAU_480

1/8

INTERNATIONALSTANDARD

ISO11082

First edition1992-1 l-l 5

Certification scheme for welded fabric forthe reinforcement of concrete structures

Systeme particulier de certification des treillis soudks pour Ieren forcement des constructions en b6 ton

Reference numberISO 11082:1992(E)

8/11/2019 SAU_480

2/8

ISO 11082:1992(E)

Foreword

ISO (the International Organization for Standardization) is a worldwidefederation of national Standards bodies (ISO member bodies). The workof preparing International Standards is normally carried out through ISOtechnical committees. Esch member body interested in a subject forwhich a technical committee has been established has the right to berepresented on that committee. International organizations, governmentaland non-governmental, in liaison with ISO, also take part in the work. ISOcollaborates closely with the International Electrotechnical Commission(IEC) on all matters of electrotechnical standardization.

Draft International Standards adopted by the technical committees arecirculated to the member bodies for voting. Publication as an InternationalStandard requires approval by at least 75 of the member bodies castinga vote.

International Standard ISO 11082 was prepared by Technical CommitteeISO/TC 17, Steel, Sub-Committee SC 16, Steels for the reinforcement andpres tressing of concre te.

Annex A of this International Standard is for information only.

0 ISO 1992All rights reserved. No part of this publication may be reproduced or utilized in any form orby any means, electronie or mechanical, including ph otocopying and mrcrofilm, without per-mission in writing from the publisher.

International Organization for StandardizationCase Postale 56 l CH-1 211 Geneve 20 l Switzerland

Printed in Switzerland

8/11/2019 SAU_480

3/8

INTERNATIONAL STANDARD ISO 11082:1992(E)

Certification scheme for welded fabric for thereinforcement of concrete structures

1 Scope

This International Standard specifies rules for a certi-fication scheme for continuous production of weldedfabric for ordinary reinforcement of concrete struc-tures, in Order to verify the conformity with require-ments specified in product Standards such asISO 6935-3.

A certification scheme for continuous productionconsists of the following stages:

- suitability testing (see clause 4);

- internal inspection by the manufacturer (seeclause 5);

- inspection and Supervision by an extemal body(see clause 6).

2 Normative references

The following Standards contain provisions which,

through reference in this text, constitute provisionsof this International Standard. At the time of publica-tion, the editions indicated were valid. All Standardsare subject to revision, and Parties to agreementsbased on this International Standard are encouragedto investigate the possibility of applying the most re-cent editions of the Standards indicated below.Members of IEC and ISO maintain registers of cur-rently valid International Standards.

ISO 6935-3: -l), Steel for the reinforcement of con-trete - Part 3: Welded fabric.

ISO 9002: 1987, Quality Systems - Model for qualityassurance in production and ins talla tion.

ISO/IEC Guide 39:1988, General requirements for theacceptance of inspection bodies.

ISO/IEC Guide 40:1983, General requirements for theacceptance of certification bodies.

3 Definitions

For the purposes of this International Standard, thefollowing definitions apply.

3.1 certification scheme: Certification System as

related to specified products, processes or Servicesto which the same particular Standards and rules, andthe same procedure, apply. [lSO/lEC Guide 21

3.2 certification body: Body that conducts certi-fication of conformity. [lSO/lEC Guide 21

3.3 characteristic value: Value having a prescribedprobability of not being attained in a hypothetical un-limited test series. [ISO 89301

NOTE 1 Equivalent to fractile, which is defined inISO 3534.

3.4 fabric type: Fabric with wires and wire arrange-ments of one kind, however with variable length andwidth.

3.5 inspection: Activities such as measuring, ex-amining, testing, gauging one or more characteristicsof a product or Service and comparing these withspecified requirements to determine conformity.[ISO 84021

3.6 inspection body (for certification): Body thatperforms inspection Services on behalf of a certi-fication body. [lSO/IEC Guide 21

1) To be published.

1

8/11/2019 SAU_480

4/8

8/11/2019 SAU_480

5/8

ISO 11082:1992(E)

4.3.3.3 Approval 5.2.2.1 Extent of testing

Once the test results have been evaluated positivelyby the certification body, a licence is issued to themanufacturer.

5 Internal inspection by themanufacturer

The results of tests on all partial quantities of thecontinuous production in accordance with 5.2.1 shallbe collated and statistically evaluated and submitted

to the inspection body and/or the certification bodyafter at least 200 results have been presented, andat least every 3 months, in Order to determine thelong-term quality Ievel.

5.1 Purpose

Continuous internal inspection of production by themanufacturer is intended to ensure that the level ofquality remains satisfactory with time and that, in thecase of test results which do not conform to theconditions, necessary measures tan be taken to im-prove production.

5.2.2.2 Evaluation where characteristic valuesare specified

The average value (KV) shall satisfy the following re-quirement:

m>fk+kxsn

5.2 Procedure

where S, is the Standard deviation of the yt results ac-

cording to 5.2.2.1.

Internal inspection by the manufacturer consists ofThe values for the acceptability index (k) are listed intable 1, for a failure rate of 5 0, = 0,95) at a prob-ability of 90 (1 -a = 0,90).

- testing of all partial quantities of continuous pro-duction (see 5.2.1);

5.2.2).- determination of the long-term quality Ievel (see

Table 1

n

- Acceptability index (k) as a functionof the number (n) of the test results

k n k

5.2.1 Testing the partial quantities

5.2.1 .l Extent of testing

The acceptance unit when testing partial quantities foreach fabric type shall not exceed 25 tons. For eachof the characteristics specified in the product stan-dard, at least one test piece shall be taken from thetest unit.

5.2.1.2 Evaluation of the test results

When a characteristic value is specified, the followingrequirement for the individual values (3) of the testunit shall be met:

5 3,40 30 2,086 3,09 40 2,Ol7 2,89 50 1,97

8 2,75 60 1,939 2,65 70 1,90

IO 2,57 80 1,8911 2,50 90 1,8712 2,45 100 1,8613 2,40 150 1,8214 2,36 200 1,7915 2,33 250 1,7816 2,30 300 1,7717 2,27 400 1,7518 2,25 500 1,7419 2,23 1 000 1,7120 2,21 00 1,64

wheref, is the specified characteristic value accordingto the product Standard.

6 Inspection by an external body

All other requirements shall be met by each individualtest piece. 6.1 Purpose

Where test results are unsatisfactory according to thissub-clause, the manufacturer shall immediately takethe necessary precautions. Test units which do notconform to the requirements shall be set aside.

The purpose o f extemal inspection is:

- continuous inspection of the conditions of pro-duction for compliance with the conditions estab-lished in the suitability test (see 4 3.1);

5.2.2 Determination of the lang-term quality

level - continuous Supervision of the proper procedure o finternal inspection as specified in clause 5.The long-term quality level shall be evaluated separ-ately for each fabric type.

8/11/2019 SAU_480

6/8

ISO 11082:1992(E)

6.2 Organkation - warning the manufacturer;

The certification body may authorize an inspectionbody to carry out the external inspection and super-Vision. The inspection body shall satisfy the require-

ments of ISO/lEC Guide 39.

6.3 Procedure

6.3.1 Extemal inspection and Supervision by the or-ganization specified in 6.2 shall be carried out atmaximum intervals of 6 months.

All properties subjected to internal inspection shall betested. The specimens shall be taken from themanufacturers or consummers stock. The test re-sults shall be statistically evaluated and comparedwith the results from internal inspection. The numberof tests in extemal inspection shall be sufficient toallow an assured assessment.

The results of extemal and internal inspection shallalso be assessed for systematic errors in sampling,test procedures and evaluation. To this end, paralleltests on test pieces from at least IO sheets from thesame fabric type shall be carried out in each case bythe manufacturer and the body undertaking externalinspection, and the results of these tests shall becompared.

6.3.2 The long-term quality level shall be determined

at least twice a year and this shall be compared withthe results achieved in internal inspection (see 5.2.2).

6.4 Evaluation

The results of extemal inspection shall be recorded ina Supervision report which shall be sent to the certi-fication body. If the results show that the productiondoes not conform to the requirements, appropriatemeasures shall be taken, depending on the type andsignificance of the deficiencies noted, for example:

- intensification of inspection (increase the fre-quency of testing);

- requesting that theshould be changed;

- withdrawal of approva

7 Delivery documei nt

conditions of production

7.1 Welded fabric which has been produced incompliance with the requirements of a relevant p rod-uct Standard and subjected to quality assurance as

described in clauses 4 to 6 of this International Stan-dard, shall be supplied with a delivery documentwhich contains the following information:

a) name of the manufacturing works;

b) Symbol or number of works;

c) body carrying out external Supervision;

d) fabric type;

e) designation according to the product Standard;

f ) quantity supplied;

g) date of manufacture;

h) recipient.

7.2 Where welded fabric is supplied via a dealer orbending works, the dealer or bending works shalltonfirm on the delivery document that the fabric onlyorginates from manufacturing works which carry outquality Supervision according to the requirements ofthis International Standard.

8/11/2019 SAU_480

7/8

IS0 11082:1992(E)

Annex A(informative)

Bibliography

[l] ISO 3534:1977, Statistics - Vocabulary andSymbols.

[2] ISO 8402: 1986, Quality - Vocabulary.

[4] ISO 10144:1991, Certification scheme for steelbars and wires for the reinforcement of concretes tructures.

[3] ISO 8930: 1987, General principles on reliabiktyfor s truc tures - List of equivalent terms.

[5] ISO/IEC Guide 2:1991, General terms and theirde finitions concerning s tandardiza tion andrelated activities.

5

8/11/2019 SAU_480

8/8

ISO 11082:1992(E)

UDC 672.85-034.14:691.328:006.63

Descriptors: concrete, reinforced concrete, reinforcing steels, steel products, welded wire lattice, certification.

?rice based on 5 pages