oSIST prEN ISO 17660-2:2026

SLOVENSKI STANDARD
01-julij-2026
Varjenje in sorodni postopki - Varjenje betonskega jekla - 2. del: Neobremenjeni
zvarni spoji (ISO/DIS 17660-2:2026)
Welding and allied processes - Welding of reinforcing steel - Part 1: Load-bearing
welded joints (ISO/DIS 17660-2:2026)
Schweißen und verwandte Verfahren - Schweißen von Betonstahl - Teil 2: Nichttragende
Schweißverbindungen (ISO/DIS 17660-2:2026)
Soudage et techniques connexes - Soudage des aciers pour armatures - Partie 1:
Assemblages transmettant des efforts (ISO/DIS 17660-2:2026)
Ta slovenski standard je istoveten z: prEN ISO 17660-2
ICS:
25.160.40 Varjeni spoji in vari Welded joints and welds
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 17660-2
ISO/TC 44/SC 10
Welding and allied processes –
Secretariat: DIN
Welding of reinforcing steel —
Voting begins on:
Part 2: 2026-05-04
Non-load-bearing welded joints
Voting terminates on:
2026-07-27
ICS: 25.160.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
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Reference number
ISO/DIS 17660-2:2026(en)
DRAFT
ISO/DIS 17660-2:2026(en)
International
Standard
ISO/DIS 17660-2
ISO/TC 44/SC 10
Welding and allied processes –
Secretariat: DIN
Welding of reinforcing steel —
Voting begins on:
Part 2:
Non-load-bearing welded joints
Voting terminates on:
ICS: 25.160.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2026
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
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Published in Switzerland Reference number
ISO/DIS 17660-2:2026(en)
ii
ISO/DIS 17660-2:2026(en)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and abbreviated terms. 2
5 Welding processes . 3
6 Preparations and specifications for welded joints . 3
6.1 General .3
6.2 Type of joints .4
7 Materials . 5
7.1 Parent materials .5
7.1.1 Reinforcing steels .5
7.1.2 Properties of joined steels .5
7.2 Welding consumables .6
8 Quality requirements . 6
9 Welding personnel . 6
9.1 Welding coordination .6
9.2 Welder and operator qualifications .6
9.2.1 Welders .6
9.2.2 Welding operators and resistance weld setters .7
10 Welding procedure specification (WPS) . 7
11 Welding procedure qualification . 7
11.1 General .7
11.2 Test specimens.7
11.3 Mechanical testing .8
11.4 Acceptance criteria .8
11.5 Range of qualification .8
11.5.1 Material.8
11.5.2 Non-load-bearing to load-bearing joints .8
11.5.3 Production route of reinforcing steel .8
11.5.4 Diameter of reinforcing steel bar .8
11.5.5 Other essential variables .8
11.6 Validity of welding procedure test.9
12 Production weld test . 9
13 Execution and inspection of production welding of reinforcing steel . 9
13.1 General .9
13.2 Welding of bent reinforcing steel bars .9
14 Visual and Mechanical testing of specimens . 10
14.1 General .10
14.2 Tensile test .10
14.3 Evaluation of test results.11
14.4 Report of results .11
Annex A (informative) Welding procedure specification (WPS)for welding processes 111, 114
and 135 .12
Annex B (informative) Technical knowledge of welding coordinatorfor welding reinforcing
steel bars . 14
Annex C (informative) Test specimens .15

iii
ISO/DIS 17660-2:2026(en)
Annex D (informative) Welding operator qualification test certificate . 17
Annex E (informative) Range of qualification for the diameter of reinforcing steel bar for each
joint type . 19
Bibliography .20

iv
ISO/DIS 17660-2:2026(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
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with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
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related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee
SC 10, Quality management in the field of welding.
ISO 17660 consists of the following parts, under the general title Welding — Welding of reinforcing steel:
— Part 1: Load-bearing welded joints
— Part 2: Non-load-bearing welded joints
This second edition cancels and replaces the first edition (ISO 17660-2:2006). The main changes in this
edition are as follows:
— Tables 1, 2 and Figure 1 have been technically changed
— 6.1 The minimum aiming shear force has been provided
— 6.1 Preparations and specifications for welded joints—General, 7.1.2 Properties of joined steels, 9.1
Welding coordination, 9.2 Welder and operator qualification, 11.5.1 Material and 11.5.4 Diameter of
reinforcing steel bar and 12 Production weld test have been technically revised
— Annex A ”Welding procedure specification(WPS)” and Annex D “Welding operator qualification test
certificate” have been added
— Annex B “Test specimens” has been technically revised
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

v
DRAFT International Standard ISO/DIS 17660-2:2026(en)
Welding and allied processes – Welding of reinforcing steel —
Part 2:
Non-load-bearing welded joints
1 Scope
This part of ISO 17660 is applicable to the welding of weldable reinforcing steel and stainless reinforcing
steel of non-load-bearing welded joints, in workshops or on site. It specifies requirements for materials,
design and execution of welded joints, welding personnel, quality requirements, examination and testing.
Load-bearing welded joints are covered by ISO 17660-1.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements 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.
ISO 3834-4, Quality requirements for fusion welding of metallic materials — Part 4: Elementary quality
requirements
ISO 4063, Welding, brazing, soldering and cutting — Nomenclature of processes and reference numbers
ISO 5817, Welding — Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) —
Quality levels for imperfections
ISO 9606-1, Qualification testing of welders — Fusion welding — Part 1: Steels
ISO 14554-2, Quality requirements for welding — Resistance welding of metallic materials — Part 2: Elementary
quality requirements
ISO 14731, Welding coordination — Tasks and responsibilities
ISO 14732, Welding personnel — Qualification testing of welding operators and weld setters for mechanized and
automatic welding of metallic materials
ISO 15609-1, Specification and qualification of welding procedures for metallic materials — Welding procedure
specification — Part 1: Arc welding
ISO 15609-5, Specification and qualification of welding procedures for metallic materials — Welding procedure
specification — Part 5: Resistance welding
ISO 15614-1, Specification and qualification of welding procedures for metallic materials — Welding procedure
test — Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys
ISO 15614-12, Specification and qualification of welding procedures for metallic materials — Welding procedure
test — Part 12: Spot, seam and projection welding
ISO 15630-1, Steel for the reinforcement and prestressing of concrete — Test methods — Part 1: Reinforcing
bars, rods and wire
ISO 16020, Steel for the reinforcement and prestressing of concrete — Vocabulary

ISO/DIS 17660-2:2026(en)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 16020 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
load-bearing welded joint
welded joint used for transmission of specified loads between reinforcing steel bars or between reinforcing
steel bars and other steel products
3.2
non-load-bearing welded joint
welded joint whose strength is not taken into account in the design of the reinforced concrete structure
Note 1 to entry: The purpose of a non-load-bearing welded joint is usually only to keep the reinforcing components in
their correct places during fabrication, transport and concreting. The weld is often called tack weld.
3.3
welder
person who holds and manipulates the electrode holder, welding torch or blowpipe by hand
3.4
manufacturer
person or organization responsible for the welding production
3.5
examiner
person appointed to verify compliance with the applicable standard
Note 1 to entry: In certain cases, an external independent examiner can be required
3.6
examining body
organization appointed to verify compliance with the applicable standard
Note 1 to entry: In certain cases, an external independent examining body can be required
4 Symbols and abbreviated terms
a throat thickness
A percentage total extension at maximum force
gt
d nominal diameter of the welded bar
d maximum nominal diameter of the welded bar
max
d minimum nominal diameter of the welded bar
min
F maximum tensile force
max
l length of the weld (cross joint)
L minimum length of the test specimen
min
r radius of bent reinforcing steel bar

ISO/DIS 17660-2:2026(en)
R specified characteristic yield strength of the reinforcing steel
e
R nominal tensile strength of the reinforcing steel
m
S nominal cross-sectional area of the bar
n
t thickness of the web of a section or of a plate to be welded
CEV carbon equivalent value
WPQR welding procedure qualification record
WPS welding procedure specification
5 Welding processes
The common welding processes are listed in Table 1 in accordance with ISO 4063.
Table 1 — List of welding processes and reference numbers in accordance with ISO 4063
Welding process Term US synonym
Manual metal arc welding
111 Shielded metal arc welding
(Metal arc welding with covered electrode)
114 Self-shielded tubular cored arc welding
Gas metal arc welding using active gas
135 MAG welding with solid wire electrode
with solid-wire electrode
21 Resistance spot welding Spot welding
23 Projection welding
The principles of this document may be applied to other welding processes.
6 Preparations and specifications for welded joints
6.1 General
A summary of recommended ranges of bar diameters for non-load-bearing welded joints, depending on the
welding process, is given in Table 2.
Table 2 — Recommended range of bar diameters for non-load-bearing welded joints
Range of bar diameter for
non-load-bearing welded joints
Type of welded joint Welding processes
mm
a
cross joint 4 to 50
lap joint 111 6 to 40
a
cross joint 6 to 50
a
d / d should be ≥ 0,2.
min max
The welds shall not affect the full load-bearing capacity and ductility of the bars. The tack weldability of
reinforcing steels may be demonstrated by special tack weldability tests (see e.g., CEN/TR 15481).
Unless otherwise specified, the minimum shear force for cross joints should be aimed for 1.5kN.

ISO/DIS 17660-2:2026(en)
6.2 Type of joints
An example of a non-load-bearing lap joint is given in Figure 1. Examples of a non-load-bearing cross joint
are given in Figures 2 and 3. The length of the weld l and throat thickness a depend on the application and
shall be in accordance with the WPS.
ld≥05,
, unless otherwise specified
Key
l length of the weld
d nominal diameter of the smaller of the two welded bars
Figure 1 — Lap joint 111, 114 or 135
Key
1 longitudinal bar (load transferring bar)
2 transverse bar
a throat thickness
d nominal diameter of the welded bar
Figure 2 — Cross joint welded by welding process 111, 114 or 135

© ISO 2
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