Cranes — Classification — Part 2: Mobile cranes

This document establishes a general classification of mobile cranes and related crane mechanisms based on the service conditions, mainly expressed by the following: — the total number of working cycles to be carried out during the specified design life of the crane; — the load spectrum factor which represents the relative frequencies of loads to be handled; — the average load displacements. This document is applicable for the work spectrum between moderate to very heavy number of work cycles as described in Table 2.

Appareils de levage à charge suspendue — Classification — Partie 2: Grues mobiles

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Published
Publication Date
30-Nov-2020
Current Stage
6060 - International Standard published
Start Date
01-Dec-2020
Completion Date
01-Dec-2020
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INTERNATIONAL ISO
STANDARD 4301-2
Third edition
2020-11
Cranes — Classification —
Part 2:
Mobile cranes
Appareils de levage à charge suspendue — Classification —
Partie 2: Grues mobiles
Reference number
ISO 4301-2:2020(E)
ISO 2020
---------------------- Page: 1 ----------------------
ISO 4301-2:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

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 © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 4301-2:2020(E)
Contents  Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1  Scope ................................................................................................................................................................................................................................. 1

2  Normative references ...................................................................................................................................................................................... 1

3  Terms and definitions ..................................................................................................................................................................................... 1

4  Classification ............................................................................................................................................................................................................ 1

4.1 General ........................................................................................................................................................................................................... 1

4.2 Classification of the crane .............................................................................................................................................................. 2

4.3 Classification of components and mechanisms .......................................................................................................... 3

4.3.1 General...................................................................................................................................................................................... 3

4.3.2 Group classification of mechanism .................................................................................................................. 4

4.3.3 Average displacements ............................................................................................................................................... 4

4.3.4 Minimum duration of use with full load ...................................................................................................... 4

Annex A (informative) Guidance for classification of mobile cranes and their components ....................6

© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 4301-2:2020(E)
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 documents 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).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

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 96, Cranes, Subcommittee SC 6, Mobile

cranes.

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.

This third edition cancels and replaces the second edition (ISO 4301-2:2009), which has been technically

revised.

The main change compared to the previous edition is the introduction of the cycle-based classification

for mobile cranes equipment following ISO 4301-1:2016.
A list of all parts in the ISO 4301 series can be found on the ISO website.
iv © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 4301-2:2020(E)
Introduction

Mobile cranes play a part in the handling of materials by raising and moving loads, the mass of which is

within their rated capacity. However, there can be wide variations in their duty. The design of the crane

should take account of the duty in terms of conditions of service, in order to reach an appropriate level

of safety and useful life which is in line with the purchaser’s requirements.

Classification serves as a reference framework between purchaser and manufacturer, by which a

particular mobile crane can be matched to the intended service. It also is the system used to provide a

means of establishing rational bases for the design of mobile cranes.
© ISO 2020 – All rights reserved v
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 4301-2:2020(E)
Cranes — Classification —
Part 2:
Mobile cranes
1  Scope

This document establishes a general classification of mobile cranes and related crane mechanisms

based on the service conditions, mainly expressed by the following:

— the total number of working cycles to be carried out during the specified design life of the crane;

— the load spectrum factor which represents the relative frequencies of loads to be handled;

— the average load displacements.

This document is applicable for the work spectrum between moderate to very heavy number of work

cycles as described in Table 2.
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 4301-1, Cranes — Classification — Part 1: General
ISO 4306-1, Cranes — Vocabulary — Part 1: General
ISO 4306-2, Cranes — Vocabulary — Part 2: Mobile cranes
3  Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 4301-1, ISO 4306-1 and

ISO 4306-2 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 http:// www .electropedia .org/
4  Classification
4.1 General

For the purpose of classification, a crane working cycle is a sequence of movements which begins when

the crane is ready to hoist the load and ends when the crane is ready to hoist the next load within the

same task. A task can be characterized by a specific combination of crane configuration and sequence

of intended movements.
© ISO 2020 – All rights reserved 1
---------------------- Page: 6 ----------------------
ISO 4301-2:2020(E)
4.2  Classification of the crane

The total number of working cycles, C, is the sum total of all working cycles during the design life of

the crane. The total number of crane working cycles during the design life of a crane can be separated

into the numbers of working cycles corresponding to several typical tasks. The total number of crane

working cycles is related to the frequency of use (e.g. daily) and the intended life (in years) of the crane.

For convenience, the range of the total number of mobile crane working cycles has been divided into

9 classes of utilization (see Table 1), identical to the corresponding classes in ISO 4301-1:2016.

Table 1 — Classes of utilizazion (U) of total numbers of mobile crane working cycles, C

Class of utilization Total number of mobile crane working cycles, C
U C ≤ 1,6 × 10
4 4
U 1,6 × 10 < C ≤ 3,15 × 10
4 4
U 3,15 × 10 < C ≤ 6,3 × 10
4 5
U 6,3 × 10 < C ≤ 1,25 × 10
5 5
U 1,25 × 10 < C ≤ 2,5 × 10
5 5
U 2,5 × 10 < C ≤ 5 × 10
5 6
U 5 × 10 < C ≤ 1 × 10
6 6
U 1 × 10 < C ≤ 2 × 10
6 6
U 2 × 10 < C ≤ 4 × 10

The load spectrum factor, K , is one of the parameters used to specify the duty of the crane by describing

the di
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 4301-2
ISO/TC 96/SC 6
Cranes — Classification —
Secretariat: ANSI
Voting begins on:
Part 2:
2020-09-09
Mobile cranes
Voting terminates on:
2020-11-04
Appareils de levage à charge suspendue — Classification —
Partie 2: Grues mobiles
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 SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 4301-2:2020(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2020
---------------------- Page: 1 ----------------------
ISO/FDIS 4301-2:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

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 © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 4301-2:2020(E)
Contents  Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1  Scope ................................................................................................................................................................................................................................. 1

2  Normative references ...................................................................................................................................................................................... 1

3  Terms and definitions ..................................................................................................................................................................................... 1

4  Classification ............................................................................................................................................................................................................ 1

4.1 General ........................................................................................................................................................................................................... 1

4.2 Classification of the crane .............................................................................................................................................................. 2

4.3 Classification of components and mechanisms .......................................................................................................... 3

4.3.1 General...................................................................................................................................................................................... 3

4.3.2 Group classification of mechanism .................................................................................................................. 4

4.3.3 Average displacements ............................................................................................................................................... 4

4.3.4 Minimum duration of use with full load ...................................................................................................... 4

Annex A (informative) Guidance for classification of mobile cranes and their components ....................6

© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/FDIS 4301-2:2020(E)
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 documents 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).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

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 96, Cranes, Subcommittee SC 6, Mobile

cranes.

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.

This third edition cancels and replaces the second edition (ISO 4301-2:2009), which has been technically

revised.

The main change compared to the previous edition is the introduction of the cycle-based classification

for mobile cranes equipment following ISO 4301-1:2016.
A list of all parts in the ISO 4301 series can be found on the ISO website.
iv © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/FDIS 4301-2:2020(E)
Introduction

Mobile cranes play a part in the handling of materials by raising and moving loads, the mass of which is

within their rated capacity. However, there can be wide variations in their duty. The design of the crane

should take account of the duty in terms of conditions of service, in order to reach an appropriate level

of safety and useful life which is in line with the purchaser’s requirements.

Classification serves as a reference framework between purchaser and manufacturer, by which a

particular mobile crane can be matched to the intended service. It also is the system used to provide a

means of establishing rational bases for the design of mobile cranes.
© ISO 2020 – All rights reserved v
---------------------- Page: 5 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 4301-2:2020(E)
Cranes — Classification —
Part 2:
Mobile cranes
1  Scope

This document establishes a general classification of mobile cranes and related crane mechanisms

based on the service conditions, mainly expressed by the following:

— the total number of working cycles to be carried out during the specified design life of the crane;

— the load spectrum factor which represents the relative frequencies of loads to be handled;

— the average load displacements.

This document is applicable for the work spectrum between moderate to very heavy number of work

cycles as described in Table 2.
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 4301-1, Cranes — Classification — Part 1: General
ISO 4306-1, Cranes — Vocabulary — Part 1: General
ISO 4306-2, Cranes — Vocabulary — Part 2: Mobile cranes
3  Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 4301-1, ISO 4306-1 and

ISO 4306-2 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 http:// www .electropedia .org/
4  Classification
4.1 General

For the purpose of classification, a crane working cycle is a sequence of movements which begins when

the crane is ready to hoist the load and ends when the crane is ready to hoist the next load within the

same task. A task can be characterized by a specific combination of crane configuration and sequence

of intended movements.
© ISO 2020 – All rights reserved 1
---------------------- Page: 6 ----------------------
ISO/FDIS 4301-2:2020(E)
4.2  Classification of the crane

The total number of working cycles, C, is the sum total of all working cycles during the design life of

the crane. The total number of crane working cycles during the design life of a crane can be separated

into the numbers of working cycles corresponding to several typical tasks. The total number of crane

working cycles is related to the frequency of use (e.g. daily) and the intended life (in years) of the crane.

For convenience, the range of the total number of mobile crane working cycles has been divided into

9 classes of utilization (see Table 1), identical to the corresponding classes in ISO 4301-1:2016.

Table 1 — Classes of utilizazion (U) of total numbers of mobile crane working cycles, C

Class of utilization Total number of mobile crane working cycles, C
U C ≤ 1,6 × 10
4 4
U 1,6 × 10 < C ≤ 3,15 × 10
4 4
U 3,15 × 10 < C ≤ 6,3 × 10
4 5
U 6
...

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