ISO/DIS 22915-21

ISO/TC 110/SC 2

Secretariat: SIS

Date: 2025-11-28

Industrial trucks — Verification of stability —

Part 21:
Order-picking trucks with operator position elevating above 1 200 mm

Chariots de manutention — Vérification de la stabilité —

Partie 21: Chariots préparateurs de commandes avec un poste de conduite élevable au-dessus de 1 200 mm

DIS stage

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Contents

Foreword

Scope

Normative references

Terms and definitions

Test conditions

General

Position of the truck on the tilt table

Lift height

Verification of stability

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.

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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 22915-21:2019), of which it constitutes a minor revision.

The main changes compared to the previous edition are as follows:

• Reference to ISO 5053-3 has been added and related terminology has been updated;
• The figures for 4.2.3 in Table 1 have been updated to show position of least stability more clearly.

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.

Industrial trucks — Verification of stability —

Part 21:
Order-picking trucks with operator position elevating above 1 200 mm

This document specifies the tests for verifying the stability of order-picking trucks with an elevating operator position, as defined in ISO 5053-1, where the operator's position can be raised to an elevation above 1 200 mm.

It is applicable to industrial trucks fitted with fork arms, platforms and/or integrated attachments under normal operating conditions.

It is not applicable to trucks fitted with a load carrier that can be shifted laterally or pivoted out of the truck's longitudinal centre plane.

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

For the purposes of this document, the terms and definitions given in ISO 5053-1, ISO 5053-3, ISO 22915-1 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• ISO Online browsing platform: available at http://www.iso.org/obp
• IEC Electropedia: available at http://www.electropedia.org/

normal operating conditions

operating conditions corresponding to the truck travelling indoors on smooth, level floors of sufficient strength such as those of concrete

Note 1 to entry: This definition is different from the one given for normal operating conditions in ISO 22915-1.

guided steering

steering mode, either mechanical (e.g. guidance rails) or non-mechanical (e.g. inductive guidance, laser sensor or infrared) not controlled directly by the operator, used to steer the truck on a predetermined straight path while travelling

restricted steering

operation under which the truck's steering is controlled by the operator and the steering angle is limited to not more than 10° from the forward or reverse travel direction

unrestricted steering

steering mode controlled by the operator with no limitation of the steering angle

The test conditions shall be in accordance with ISO 22915-1.

The load axle and the driving/steering axle are defined by Figure 1.

Key

A-A longitudinal centre plane of truck

B-B driving/steering axle

C-C load axle

Figure 1 — Load and driving/steering axles

The truck shall be positioned on the tilt table so that its driving/steering axle, B–B, and load axle, C–C, are parallel to the tilt axis, X–Y, of the tilt table. See Table 1.

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 Table 1.

In all positions, the stabilizer wheel(s) shall be turned away from X-Y to the orientation that produces minimum stability.

Point M is the point located on the driving/steering axle end of the truck and defined as follows.

1. For trucks with a single drive (steer) 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.
2. 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 plane, A–A, of the truck.
3. For trucks with dual drive (steer) wheels: 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 centre plane, A–A, of the truck.
4. 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.
5. For trucks with non-articulated, non-sprung stabilizers or wheels and a non-articulated drive wheel:
6. for the non-sprung stabilizer or wheel, point M shall be the vertical projection onto the tilt table of the point of intersection between the centreline of the stabilizer or wheel axle and the centreline of the stabilizer or drive wheel width, with the non-sprung stabilizer or wheel being positioned with the centreline of the stabilizer wheel axle nearer to the centre plane of the truck;
7. for the non-articulated drive wheel, point M shall be the vertical projection onto the tilt table of the point of intersection between the centreline of the drive wheel axle and the centre line of the drive wheel width.
8. For trucks with a sprung stabilizer or wheel: point M shall be the vertical projection onto the tilt table of the point of intersection between the centreline of the drive wheel axle and the centreline of the drive wheel width.

As shown in Table 1, point N is defined as the centre point of the area of contact between the tilt table surface and the load wheel closest to the tilt axis, X–Y, of the tilt table.

Lift heights for tests shall be measured from the tilt table to the upper-most point of the load carrying surface.

The stability shall be verified in accordance with Table 1.

Table 1 — Verification of stability