ISO/FDIS 22915-4

• Abstract:

  This part of ISO 22915 specifies tests for verifying the stability of — pallet stackers, — double stackers, and — order-picking trucks with an operator position elevating up to and including 1 200 mm lift height, measured from the ground to the floor of the platform. It is applicable to these types of industrial truck, whether with tilting or non tilting masts or fork arms, having a rated capacity up to and including 5 000 kg. It is also applicable to such trucks operating under the same conditions when equipped with load-handling attachments and to order-picking trucks with an elevating operator's position up to and including 1 200 mm lift height when equipped with an additional load lifting device(s).

• Status: Not Published
• ICS: 53.060 - Industrial trucks
• Technical Committee: ISO/TC 110/SC 2 - Safety of powered industrial trucks
• Drafting Committee: ISO/TC 110/SC 2/WG 11 - Stability
• Current Stage: 5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
• Start Date: 21-Sep-2026
• Completion Date: 21-Sep-2026

• Revises: ISO 22915-4:2018 - Industrial trucks — Verification of stability — Part 4: Pallet stackers, double stackers and order-picking trucks with operator position elevating up to and including 1 200 mm lift height
• Effective Date: 24-Aug-2024

Overview

ISO/FDIS 22915-4:2026, published by the International Organization for Standardization (ISO), sets forth test methods for verifying the stability of specific types of industrial trucks. This part focuses on pallet-stacking trucks, double-stackers, and order-picking trucks with operator positions that elevate up to and including 1,200 mm lift height, as measured from the ground to the platform floor.

Applicable to trucks with a rated capacity up to 5,000 kg, whether equipped with tilting or non-tilting masts or fork arms, this standard ensures safety compliance when these vehicles are used with or without load-handling attachments. Its requirements also extend to order-picking trucks fitted with additional load-lifting devices, maintaining safety under all specified conditions.

Key Topics

• Test Methods: Outlines standardized tests to verify truck stability during various operation modes, such as travel and stacking.
• Applicable Trucks: Applies to pallet stackers, double-stackers, and order-pickers with elevation up to 1,200 mm, including those with additional attachments or load-lifting devices.
• Lift Heights: Specifies how to determine proper test positions at various lift heights, ensuring comprehensive coverage of actual working scenarios.
• Axle and Wheel Positions: Details requirements for positioning axles, stabilizer wheels, and articulating frames on the tilt table during tests, reflecting real-world stability challenges.
• Datum Points: Requires use of reference points to ensure consistency in conducting and reproducing stability assessments.
• Travel and Load Arrangement: Addresses conditions for testing with loads in both leading and trailing positions, as well as the applicable configurations for double-stackers and order-picking trucks.
• Stability Criteria: Presents clear thresholds for tilt-table angles and operational circumstances that must be met for compliance.

Applications

ISO/FDIS 22915-4 is essential for:

• Industrial Truck Manufacturers: Assisting in the design of safer trucks that meet international stability standards, especially when developing new models or introducing additional attachments.
• Operators and Fleet Managers: Ensuring that their equipment meets globally recognized stability criteria, minimizing accident risks and enhancing workplace safety.
• Safety Inspectors and Regulators: Providing a clear benchmark for compliance checks within warehouses, distribution centers, and manufacturing facilities using pallet stackers or order-picking trucks.
• Maintenance and Engineering Teams: Facilitating the assessment and recertification of industrial trucks after modifications or attachment installations, guaranteeing continued adherence to safety requirements.

Utilizing the methods and criteria of ISO/FDIS 22915-4 supports operational safety, reduces downtime from accidents, and demonstrates due diligence in line with international best practices for material handling equipment.

Related Standards

For comprehensive safety and performance management of industrial trucks, the following related standards should be consulted:

• ISO 22915-1: Industrial trucks - Verification of stability - Part 1: General requirements. This foundational standard details general principles and baseline test procedures for industrial truck stability.
• ISO 5053-1: Industrial trucks - Vocabulary - Part 1: Types of industrial trucks. Provides terminology and definitions ensuring consistent communication across manufacturers and operators.
• ISO 5053-3: Industrial trucks - Vocabulary - Part 3: Accessories and components. Defines ancillary equipment and parts terminology.
• Other parts of the ISO 22915 series, which address stability verification for additional truck types and specific operational scenarios.

By implementing ISO/FDIS 22915-4 alongside related standards, organizations achieve a holistic, internationally accepted approach to powered industrial truck safety and stability verification.

Keywords: ISO 22915-4, pallet-stacking trucks, double-stackers, order-picking trucks, industrial truck stability, operator elevating position, safety standard, tilt table tests, warehouse equipment compliance, material handling safety.

FINAL DRAFT
International
Standard
ISO/TC 110/SC 2
Industrial trucks — Verification of
Secretariat: SIS
stability —
Voting begins on:
2026-09-21
Part 4:
Pallet-stacking trucks, double-
Voting terminates on:
2026-11-16
stackers and order-picking trucks
with operator position elevating
up to and including 1 200 mm lift
height
Chariots de manutention — Vérification de la stabilité —
Partie 4: Chariots à fourche recouvrante, chariots à double
fourche et chariots préparateurs de commandes avec un poste de
conduite élevable ayant une hauteur de levée de 1 200 mm inclus
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
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
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.
Reference number
FINAL DRAFT
International
Standard
ISO/TC 110/SC 2
Industrial trucks — Verification of
Secretariat: SIS
stability —
Voting begins on:
Part 4:
Pallet-stacking trucks, double-
Voting terminates on:
stackers and order-picking trucks
with operator position elevating
up to and including 1 200 mm lift
height
Chariots de manutention — Vérification de la stabilité —
Partie 4: Chariots à fourche recouvrante, chariots à double
fourche et chariots préparateurs de commandes avec un poste de
conduite élevable ayant une hauteur de levée de 1 200 mm inclus
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.
© ISO 2026
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test conditions . 2
4.1 General .2
4.2 Position of the truck on the tilt table .2
4.2.1 Load and driving/steering axles .2
4.2.2 Tests 1, 2, 6, 7 and 8 .2
4.2.3 Tests 3, 4, 5 and 9 .2
4.3 Datum point positions .3
4.3.1 General .3
4.4 Lift height for tests simulating travel .4
4.5 Lift height of the upper load for tests simulating travel when the truck is used as a
double-stacker .4
5 Verification of stability . 4

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 110, Industrial trucks, Subcommittee SC 2,
Safety of powered industrial trucks.
This third edition cancels and replaces the second edition (ISO 22915-4:2018), which has been technically
revised.
The main changes are as follows:
— truck terminology has been updated according to ISO 5053-1 and ISO 5053-3;
— Figure 1 and Figure 2 have been updated to show a stacker instead of a straddle truck;
— editorial changes to the text;
— the Bibliography has been updated;
— Table 1 has been split into Figures 3-5 and drawings have been adjusted for better comprehensibility.
A list of all parts in the ISO 22915 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
FINAL DRAFT International Standard ISO/FDIS 22915-4:2026(en)
Industrial trucks — Verification of stability —
Part 4:
Pallet-stacking trucks, double-stackers and order-picking
trucks with operator position elevating up to and including 1
200 mm lift height
1 Scope
This document specifies tests for verifying the stability of the following types of trucks as defined in
ISO 5053-1:
a) pallet-stacking trucks;
b) double-stackers;
c) order-picking trucks with an operator position elevating up to and including 1 200 mm lift height,
measured from the ground to the floor of the platform.
It is applicable to these types of industrial trucks whether they have tilting or non-tilting masts or fork arms,
having a rated capacity up to and including 5 000 kg.
It is also applicable to trucks that operate under the same conditions when equipped with load-handling
attachments and order-picking trucks with an elevating operator's position up to and including 1 200 mm
lift height when equipped with an additional load lifting device(s).
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 5053-1, Industrial trucks — Vocabulary — Part 1: Types of industrial trucks
ISO 5053-3, Industrial trucks — Vocabulary — Part 3: Accessories and components
ISO 22915-1, Industrial trucks — Verification of stability — Part 1: General
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5053-1, ISO 5053-3 and ISO 22915-1
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/

-------
...

SISO/DISISO/FDIS 22915-4:2025(en)
ISO/TC 110/SC 2/WG 11
Secretariat: SIS
Date: 2025-10-272026-09-07
Industrial trucks — Verification of stability —
—
Part 4:
Pallet-stacking trucks, double-stackers and order-picking trucks with
operator position elevating up to and including 1 200 mm lift height
Chariots de manutention — Vérification de la stabilité —
Partie 4: Chariots à fourche recouvrante, chariots à double fourche et chariots préparateurs de commandes
avec un poste de conduite élevable ayant une hauteur de levée de 1 200 mm inclus
FDIS stage
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 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel.Phone: + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail: [e-mail]
Website: www.iso.org
Published in Switzerland
MUST BE USED
FOR FINAL
Contents
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test conditions . 2
4.1 General. 2
4.2 Position of the truck on the tilt table . 2
4.3 Datum point positions . 3
4.4 Lift height for tests simulating travel . 5
4.5 Lift height of the upper load for tests simulating travel when the truck is used as a
double-stacker . 5
5 Verification of stability . 5

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 110, Industrial trucks, Subcommittee SC 2,
Safety of powered industrial trucks.
This third edition cancels and replaces the second edition (ISO 22915-4:2018), which has been technically
revised.
The main changes are as follows:
— — truck terminology has been updated according to ISO 5053-1 and ISO 5053-3;
— Figure 1 — Figure 1 and Figure 2 Figure 2 have been updated to show a stacker instead of a straddle truck;
— — editorial changes to the text;
— — the Bibliography has been updated;
— Table 1 — Table 1 has been split into Figure 3 Table 1-4-Figure 5 and drawings have been adjusted for
better comprehensibility.
A list of all parts in the ISO 22915 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
ISO/DISFDIS 22915-4:20252026(en)
Industrial trucks — Verification of stability —
—
Part 4:
Pallet-stacking trucks, double-stackers and order-picking trucks with
operator position elevating up to and including 1 200 mm lift height
1 Scope
This document specifies tests for verifying the stability of the following types of trucks as defined in ISO 5053-
1:
a) a) pallet-stacking trucks;
b) b) double-stackers;
c) c) order-picking trucks with an operator position elevating up to and including 1 200 mm lift
height, measured from the ground to the floor of the platform.
It is applicable to these types of industrial trucks whether they have tilting or non-tilting masts or fork arms,
having a rated capacity up to and including 5 000 kg.
It is also applicable to trucks that operate under the same conditions when equipped with load-handling
attachments and order-picking trucks with an elevating operator's position up to and including 1 200 mm lift
height when equipped with an additional load lifting device(s).
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 5053--1, Industrial trucks — Vocabulary — Part 1: Types of industrial trucks
ISO 5053--3, Industrial trucks — Vocabulary — Part 3: Accessories and components
ISO 22915--1, Industrial trucks — Verification of stability — Part 1: General
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5053-1, ISO 5053-3 and ISO 22915-
1 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/
MUST BE USED
FOR FINAL
4 Test conditions
4.1 General
The test conditions shall be in accordance with ISO 22915-1.
4.2 Position of the truck on the tilt table
4.2.1 Load and driving/steering axles
The load axle and the driving/steering axle are outlined in Figure 1 Figure 1.
C
A
A
C
Key
A-A longitudinal centre plane of truck
B-B driving/steering axle
C-C load axle
Figure 1 — Load and driving/steering axles
4.2.2 Tests 1, 2, 6, 7 and 8
The truck shall be positioned on the tilt table so that its driving/steering axle, B–B, or load axle, C–C, are
parallel to the tilt axis, X–Y, of the tilt table. See Figure 3 Table 2.
4.2.3 Tests 3, 4, 5 and 9
The truck shall be positioned on the tilt table with the line, M–N, parallel to the tilt axis, X–Y, of the tilt table.
See Figure 4 Tables 3 and Figure 5 4.
ISO/DISFDIS 22915-4:20252026(en)
Point M is the point on the driving/steering axle B-B projected onto the tilt table. It is defined as follows:.
a) a) For trucks with a single non-articulating drive/steered wheel: Point M shall be the vertical
projection onto the tilt table of the point of intersection between the centreline of the driving/steering
axle and the centreline of the drive wheel width.
b) b) For trucks with a single or dual non-sprung stabilizer wheel: Point M shall be the vertical
projection onto the tilt table of the point of intersection between the centreline of the stabilizer wheel axle
and the centreline of the stabilizer wheel width (single) or the centreline between the two stabilizer
wheels (dual), with the centreline of the stabilizer wheel axle being positioned parallel to X–Y. The
stabilizer wheel shall be turned away from X-Y to the orientation that produces minimum stability.
c) c) For trucks with a driving/steering axle in an articulating frame articulated in the centre plane
of the truck: Point M shall be the vertical projection onto the tilt table of the point of intersection between
the lateral axis of the articulating frame and the centre plan
...