ISO 22040-2:2024

International
Standard
ISO 22040-2
First edition
Life cycle management of concrete
2024-05
structures —
Part 2:
Structural planning and design stage
Gestion du cycle de vie des structures en béton —
Partie 2: Etape de conception, définition du schéma structurel
et calcul
Reference number
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Life cycle management at the structural planning stage . 2
4.1 General .2
4.2 Planning and performance requirements of structures .2
4.3 Basic LCM scenario .3
4.4 Determination of structural concept .4
5 Life cycle management at the structural design stage . 5
5.1 General .5
5.2 Management items .6
5.2.1 Design actions .6
5.2.2 Assumptions and methods in structural analysis .6
5.2.3 Material properties .6
5.2.4 Performance verification .6
5.2.5 Assessment of sustainability indicators .7
5.2.6 Maintenance programme .7
5.2.7 Management/demolition program after the end-of-life stage .7
5.3 Feedback to structural planning stage .7
Bibliography . 8

iii
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,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
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)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
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 71, Concrete, reinforced concrete and pre-
stressed concrete.
A list of all parts in the ISO 22040 series can be found on the ISO website.
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.

iv
Introduction
A concrete structure passes through different stages during its life: from the planning, design, execution
and use stages to the end-of-life stage. Due to its long life, it involves different parties at each stage. This
implies that it is essential to transfer important information from one stage to another in an appropriate
form. However, in reality, no appropriate system has been developed regarding the basic concept and
specific methods to achieve this and manage the life cycle of the structure in a consistent manner (life cycle
management).
Such lack of an appropriate system creates limitations in durability management of concrete structures,
which has been recognized as a serious problem in the field of concrete technologies. This means that the
prerequisites at the design stage are not managed appropriately and that execution-induced problems
are not ascertained and documented. Regarding the former, there has not been a system for clarifying a
long-term maintenance program based on conditions elaborated at the design stage and ensuring its
continuation in an appropriate form. Regarding the latter, since a number of uncertain elements exist in the
construction of a concrete structure, the quality of construction does not always match the prerequisites
of design. Therefore, construction involves factors impairing the durability of the structure in quite a few
cases. This suggests that confirmation of completion of the structure and documentation of the procedure to
completion are essential for ensuring its performance in its life cycle. It can also become necessary to alter
the design conditions of a concrete structure in the use stage. In such a case, basic information regarding
the original design becomes essential, but it is often not retained in an appropriate form. As a result, it takes
much work to retrieve basic information of the existing structure. Moreover, the design and execution need
to be based on uncertainty to a certain extent. For appropriate management of a structure, it is therefore
extremely important to keep all basic information at each stage.
Some standards, regarding the life cycle of infrastructure, have already been developed. The pertinent
standards are the ISO 15686 series. The ISO 15686 series is relevant to the service life planning of new and
existing buildings and cover a part of the planning process. In the ISO 15686 series, service life estimation
applies principally to the estimation of residual service lives of components of a building that are already
in service, and to the selection of components for, and the detailing of, repairs and new work. While a part
of basic philosophy of these standards can be applied, it is difficult or rather impossible to fully apply these
documents to the life cycle management of concrete structures without misunderstanding because these
standards only deal with buildings with replaceable components including ancillaries. This document covers
any kind of concrete structures.
A standard is, therefore, necessary regarding the basic concept and specific procedures for methods
of managing concrete structures in view of the current problems, in order to rationally control concrete
structures throughout their life cycle and more reliably ensure functioning of future documents. With this
as a background, ISO 22040 was developed to establish the key principles, framework and procedures for
appropriately implementing life cycle management (LCM) in which planning, design, execution, use and end-
of-life of a structure are appropriately connected one after another. Based on it, this document focuses on
the management of structural planning and design stage in details as the overall life cycle management of
concrete structures.
A structure is constructed with its own purposes. It generally includes protecting people from disasters and
ensuring a comfortable and safe life. A structure is required to maintain its functions and performance to
achieve these purposes. The introduction of LCM for a structure contributes to all aspects of sustainability
while maintaining the functions and performances to fulfil its purposes.
Sustainability is the goal of sustainable development. It refers to any state of the global system in which
the needs of the present are met without compromising the ability of future generations to meet their own
needs. The concept of sustainability is continually evolving. Understanding and achieving a balance between
environmental, social and economic aspects, ideally in mutually supporting ways, is considered essential for
making progress towards achieving sustainability. The achievement of sustainability is now recognized as
one of the most important considerations in all human activities (see ISO Guide 82).
A concrete structure inherently has a planned life when it is well designed, executed and maintained under
proper life cycle management based on sustainability framework.

v
International Standard ISO 22040-2:2024(en)
Life cycle management of concrete structures —
Part 2:
Structural planning and design stage
1 Scope
This document applies to management conducted at the structural planning and design stages as part of the
ISO 22040 series.
NOTE Basic design or conceptual design of a structure is conducted at the structural planning stage, whereas
verification is conducted at the design stage to confirm that the performance requirements are satisfied, and balance
of the specified sustainability indicators is ensured at the time of design.
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 2394, General principles on reliability for structures
ISO 16204, Durability — Service life design of concrete structures
ISO 19338, Performance and assessment requirements for design standards on structural concrete
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology 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
life cycle
set of consecutive, interlinked stages of a structure, which comprise planning, design, execution, use and
end-of-life stages
3.2
life cycle management
LCM
set of systematic and coordinated activities and practices through which a structure is appropriately
managed over its life cycle (3.1)
3.3
life cycle management scenario
LCM scenario
plan for ensuring performance (3.5) of a structure throughout its life cycle (3.1)

3.4
maintenance
set of activities taken to check, evaluate the performance (3.5) of a structure and preserve/restore it so as to
satisfy performance requirements (3.6) in service
[SOURCE: ISO 16311-1:2014, 3.8]
3.5
performance
qualitative or quantitative representation of the behaviour of a structure
3.6
performance requirement
required performance (3.5) determined in the structural planning stage
3.7
sustainability
ability of a structure or structural element to contribute positively to the fulfilment of the present needs of
humankind with respect to social, economic and environmental aspects, without compromising the ability
of future generations to meet their needs in a similar manner
3.8
sustainability indicator
indicator related to economic, environmental or social impacts
[SOURCE: ISO 21929-1:2011, 3.33]
4 Life cycle management at the structural planni
...