ISO 20474-10:2017

Earth-moving machinery - Safety - Part 10: Requirements for trenchers

ISO 20474-10:2017 gives the safety requirements specific to trenchers as defined in ISO 6165. It is intended to be used in conjunction with ISO 20474‑1, which specifies general safety requirements common to two or more earth-moving machine families. The specific requirements given in this document take precedence over the general requirements of ISO 20474‑1. ISO 20474-10:2017 deals with all significant hazards, hazardous situations and events relevant to the earth-moving machinery within its scope (see ISO 20474‑1:2017, Annex A) when used as intended or under conditions of misuse reasonably foreseeable by the manufacturer. It specifies the appropriate technical measures for eliminating or reducing risks arising from relevant hazards, hazardous situations or events during commissioning, operation and maintenance. ISO 20474-10:2017 is not applicable to machines manufactured before the date of its publication.

Engins de terrassement — Sécurité — Partie 10: Exigences applicables aux trancheuses

General Information

• Status: Published
• Publication Date: 06-Jul-2017
• ICS: 53.100 - Earth-moving machinery
• Technical Committee: ISO/TC 127/SC 2 - Safety, ergonomics and general requirements
• Drafting Committee: ISO/TC 127/SC 2 - Safety, ergonomics and general requirements
• Parallel Committee: ISO/TC 23/SC 15 - Machinery for forestry
• Current Stage: 9093 - International Standard confirmed
• Start Date: 06-Dec-2022
• Completion Date: 13-Dec-2025

Relations

• Consolidated By: ISO 11979-10:2018 - Ophthalmic implants - Intraocular lenses - Part 10: Clinical investigations of intraocular lenses for correction of ametropia in phakic eyes
• Effective Date: 06-Jun-2022
• Revises: ISO 20474-10:2008 - Earth-moving machinery - Safety - Part 10: Requirements for trenchers
• Effective Date: 03-Nov-2011

Overview

ISO 20474-10:2017 - "Earth-moving machinery - Safety - Part 10: Requirements for trenchers" specifies safety requirements specific to trenchers (as defined in ISO 6165) and is intended to be used together with ISO 20474‑1 (general safety requirements for earth‑moving machinery). This type‑C standard covers significant hazards, hazardous situations and events during commissioning, operation and maintenance of trenchers when used as intended or in reasonably foreseeable misuse. The specific requirements of ISO 20474-10 take precedence over the general requirements in ISO 20474‑1. It is not applicable to machines manufactured before its publication date.

Key topics and technical requirements

• Scope & precedence
  • Applies only to trenchers and supplements ISO 20474‑1; specific trenchers’ requirements override general clauses where they differ.
• Restraint bar
  • A restraint bar must be fitted and extend as far as practical over the length of the digging chain to reduce contact with digging elements.
• Ride‑on trenchers
  • Operator’s seat and station requirements, including exceptions (e.g., transverse seats may not require fore/aft adjustment).
  • Additional or separate operator stations for attachments can have specific exemptions (cab, ROPS, FOPS).
• Operator controls
  • Engine stop provisions: additional engine stop if a special-attachment seat cannot reach the normal stop per ISO 6682.
  • Control deactivation: travel and attachment movement must stop when the operator leaves the station.
• Non‑riding (pedestrian) trenchers
  • Must include systems that stop travel and hazardous tool movement when operator releases controls.
  • Controls must be designed to prevent inadvertent movement toward the operator.
  • Lighting and warning-device provisions: ISO 12509 applies if lighting is fitted; some warning-device rules for pedestrian-controlled machines are modified.
• Noise
  • Sound power and operator sound pressure measurements per ISO 6393 and ISO 6394.
  • Instruction to wear hearing protection when A‑weighted sound pressure exceeds 85 dB.
• Information for use
  • User instructions must include hearing protection advice, deactivating device instructions, restraint bar safety rules, and guidance for pedestrian-controlled trenchers.

Applications - who uses ISO 20474-10:2017

• Trenchers’ manufacturers for design, safety compliance and CE marking guidance
• Safety and compliance engineers preparing risk assessments and technical files
• Procurement teams specifying safe equipment for construction, utilities and pipeline work
• Test laboratories measuring sound and validating control/deactivation systems
• Operators and maintenance personnel relying on information-for-use and safety instructions

Related standards

• ISO 20474‑1 (General safety requirements for earth‑moving machinery)
• ISO 6165 (Trencher definition / basic types)
• ISO 12509 (Lighting, signalling, marking)
• ISO 6393 / ISO 6394 (Noise measurement)
• ISO 13539 (Trencher definitions / commercial specs)
• ISO 6682 (Control reach/zones)

Keywords: ISO 20474-10:2017, trenchers safety, earth-moving machinery, restraint bar, operator controls, pedestrian trenchers, noise measurement, ISO 20474-1.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 20474-10
Second edition
2017-07
Earth-moving machinery — Safety —
Part 10:
Requirements for trenchers
Engins de terrassement — Sécurité —
Partie 10: Exigences applicables aux trancheuses
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
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ii © ISO 2017 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Safety requirements and protective measures . 2
4.1 General . 2
4.2 Restraint bar . 2
4.3 Ride-on operated trenchers . 2
4.3.1 Operator’s seat . 2
4.3.2 Operator’s controls . 3
4.4 Non-riding trenchers . 3
4.4.1 Controls . 3
4.4.2 Lighting . 3
4.4.3 Warning devices and safety signs . 3
4.5 Noise . 3
4.5.1 Sound power level . 3
4.5.2 Sound pressure level at operator’s station . 3
5 Information for use . 3
Annex A (informative) Illustrations. 5
Bibliography . 8
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
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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
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For an explanation on 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 the following
URL: w w w . i s o .org/ iso/ foreword .html
This document was prepared by Technical Committee ISO/TC 127, Earth-moving machinery,
Subcommittee SC 2, Safety, ergonomics and general requirements.
This second edition cancels and replaces the first edition (ISO 20474-10:2008), which has been
technically revised with the following changes:
— normative references have been updated;
— references to national and regional provisions in the withdrawn ISO/TS 20474-14 have been deleted;
— new safety requirements and protective measures have been added, and the illustrations of Annex A
updated.
It is intended to be used in conjunction with ISO 20474-1.
A list of all parts in the ISO 20474 series, published under the general title, Earth-moving machinery —
Safety, can be found on the ISO website.
iv © ISO 2017 – All rights reserved

Introduction
This document is a type-C standard as stated in ISO 12100.
The machinery concerned and the extent to which hazards, hazardous situations or hazardous events
are covered are indicated in the Scope of this document.
When requirements of this type-C standard are different from those which are stated in type-A or B
standards, the requirements of this type-C standard take precedence over the requirements of the
other standards for machines that have been designed and built according to the require
...