prEN ISO 11806-2

Agricultural and forestry machinery - Safety requirements and testing for portable, hand-held, powered brush-cutters and grass-trimmers - Part 2: Machines for use with back-pack power unit (ISO/DIS 11806-2:2020)

Land- und forstwirtschaftliche Maschinen - Sicherheitstechnische Anforderungen und Prüfung für tragbare handgehaltene motorbetriebene Freischneider und Grastrimmer - Teil 2: Maschinen für den Gebrauch mit rückentragbarer Antriebseinheit (ISO/DIS 11806-2:2020)

Dieser Teil der ISO 11806 enthält sicherheitstechnische Anforderungen sowie Maßnahmen zu deren Überprüfung für die Gestaltung und Konstruktion von tragbaren, handgehaltenen, motorbetriebenen Freischneidern und Grastrimmern mit rückentragbarer verbrennungsmotorisch betriebener Antriebseinheit und mechanischer Kraftübertragung zwischen der Antriebseinheit und der Schneidgarnitur. Er legt Verfahren für die Beseitigung oder Verringerung von Gefährdungen fest, die durch den Einsatz dieser Maschinen entstehen, sowie die Art der Informationen für sichere Arbeitsweisen, die vom Hersteller zur Verfügung zu stellen sind.
Dieser Teil der ISO 11806, zusammen mit den relevanten Abschnitten von ISO 11806-1 (siehe 4.1), behandelt alle signifikanten Gefährdungen, Gefährdungssituationen oder Gefährdungsereignisse, mit Ausnahme der von rückentragbaren Antriebseinheiten ausgehenden Ganzkörperschwingungen, die für diese Maschinen relevant sind sofern sie für den vorgesehenen Zweck und bei vom Hersteller vernünftigerweise vorhersehbarem Missbrauch eingesetzt werden.
ANMERKUNG 1 Eine standardisierte Prüfmethode zur Messung der Ganzkörperschwingungen, die von der rückentragbaren Antriebseinheit ausgehen, ist derzeit nicht verfügbar.
ANMERKUNG 2 Siehe Anhang A, zusammen mit Anhang A in ISO 11806-1:2020, zur Liste der signifikanten Gefährdungen.
Dieser Teil der ISO 11806 gilt für tragbare handgehaltene motorbetriebene Freischneider und Grastrimmer, die nach dem Ausgabedatum der Norm hergestellt worden sind.
Dieser Teil der ISO 11806 gilt nicht für Maschinen, die mit mehrteiligen, metallischen Schneidgarnituren, z. B. schwenkbaren Ketten oder Schlegelmessern, ausgestattet sind.

Matériel agricole et forestier - Exigences de sécurité et essais pour débroussailleuses et coupe-herbe portatifs à moteur - Partie 2: Machines pour utilisation avec source motrice portée à dos (ISO/DIS 11806-2:2020)

Kmetijski in gozdarski stroji - Tehnične varnostne zahteve in preskus za prenosne, ročno vodene kosilnice s prosto rezjo, opremljene z rezilno ploščo ali kosilno nitko - 2. del: Naprave z nahrbtno prenosno pogonsko enoto (ISO/DIS 11806-2:2020)

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN ISO 11806-2:2020
01-september-2020

Kmetijski in gozdarski stroji - Tehnične varnostne zahteve in preskus za prenosne,

ročno vodene kosilnice s prosto rezjo, opremljene z rezilno ploščo ali kosilno
nitko - 2. del: Naprave z nahrbtno prenosno pogonsko enoto (ISO/DIS 11806-
2:2020)

Agricultural and forestry machinery - Safety requirements and testing for portable, hand-

held, powered brush-cutters and grass-trimmers - Part 2: Machines for use with back-

pack power unit (ISO/DIS 11806-2:2020)

Land- und forstwirtschaftliche Maschinen - Sicherheitstechnische Anforderungen und

Prüfung für tragbare handgehaltene motorbetriebene Freischneider und Grastrimmer -

Teil 2: Maschinen für den Gebrauch mit rückentragbarer Antriebseinheit (ISO/DIS 11806

-2:2020)

Matériel agricole et forestier - Exigences de sécurité et essais pour débroussailleuses et

coupe-herbe portatifs à moteur - Partie 2: Machines pour utilisation avec source motrice

portée à dos (ISO/DIS 11806-2:2020)
Ta slovenski standard je istoveten z: prEN ISO 11806-2
ICS:
65.060.80 Gozdarska oprema Forestry equipment
oSIST prEN ISO 11806-2:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 11806-2:2020
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oSIST prEN ISO 11806-2:2020
DRAFT INTERNATIONAL STANDARD
ISO/DIS 11806-2
ISO/TC 23/SC 17 Secretariat: SIS
Voting begins on: Voting terminates on:
2020-06-18 2020-09-10
Agricultural and forestry machinery — Safety
requirements and testing for portable, hand-held, powered
brush-cutters and grass-trimmers —
Part 2:
Machines for use with back-pack power unit

Matériel agricole et forestier — Exigences de sécurité et essais pour débroussailleuses et coupe-herbe

portatifs à moteur —
Partie 2: Machines pour utilisation avec source motrice portée à dos
ICS: 65.060.80
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 11806-2:2020(E)
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 SUPPORTING DOCUMENTATION. ISO 2020
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oSIST prEN ISO 11806-2:2020
ISO/DIS 11806-2:2020(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
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Published in Switzerland
ii © ISO 2020 – All rights reserved
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oSIST prEN ISO 11806-2:2020
ISO/DIS 11806-2:2020(E)
Contents Page

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

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

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

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

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Safety requirements and/or protective measures ............................................................................................................ 3

4.1 General ........................................................................................................................................................................................................... 3

4.2 Distance to cutting attachment ................................................................................................................................................. 3

4.2.1 Requirements ..................................................................................................................................................................... 3

4.2.2 Verification ............................................................................................................................................................................ 3

4.3 Handgrip on back-pack power unit ....................................................................................................................................... 4

4.3.1 Requirement ........................................................................................................................................................................ 4

4.3.2 Verification ............................................................................................................................................................................ 4

4.4 Harness for back-pack power unit ......................................................................................................................................... 4

4.4.1 Requirements ..................................................................................................................................................................... 4

4.4.2 Verification ............................................................................................................................................................................ 5

4.5 Hydraulic and pneumatic pipes and hoses ..................................................................................................................... 5

4.5.1 Requirements ..................................................................................................................................................................... 5

4.5.2 Verification ............................................................................................................................................................................ 5

5 Information for use ............................................................................................................................................................................................ 5

Annex A (informative) List of significant hazards................................................................................................................................... 6

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Directive 2006/42/EC aimed to be covered ............................................................................... 7

Bibliography .............................................................................................................................................................................................................................13

© ISO 2020 – All rights reserved iii
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oSIST prEN ISO 11806-2:2020
ISO/DIS 11806-2:2020(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 23, Tractors and machinery for agriculture

and forestry, Subcommittee SC 17, Manually portable forest machinery.

This third edition of ISO 11806-2 cancels and replaces ISO 11806-2:2020, of which it is also a technical

revision.
The main changes compared to the previous edition are as follows:
— reference to the updated version of ISO 11806-1
— requirements for the harness for the back-pack power unit reworded and amended
A list of all parts in the ISO 11806 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 2020 – All rights reserved
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oSIST prEN ISO 11806-2:2020
ISO/DIS 11806-2:2020(E)
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

type-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 requirements of

this type-C standard.
© ISO 2020 – All rights reserved v
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oSIST prEN ISO 11806-2:2020
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oSIST prEN ISO 11806-2:2020
DRAFT INTERNATIONAL STANDARD ISO/DIS 11806-2:2020(E)
Agricultural and forestry machinery — Safety
requirements and testing for portable, hand-held, powered
brush-cutters and grass-trimmers —
Part 2:
Machines for use with back-pack power unit
1 Scope

This part of ISO 11806 gives safety requirements and measures for their verification for the design

and construction of portable, hand-held, powered brush-cutters and grass-trimmers with a back-pack-

mounted combustion engine power source and mechanical power transmission between the power

source and the cutting attachment. Methods for the elimination or reduction of hazards arising from

the use of these machines and the type of information on safe working practices to be provided by the

manufacturer are specified.

This part of ISO 11806, taken together with the relevant clauses of ISO 11806-1 (see 4.1), deals with

all significant hazards, hazardous situations and hazardous events, with the exception of whole-body

vibration from the back-pack power unit, relevant to these machines when they are used as intended

and under conditions of misuse which are reasonably foreseeable by the manufacturer.

NOTE 1 A standardized test procedure for measuring whole-body vibration from the back-pack power unit is

presently not available.

NOTE 2 See Annex A, together with Annex A in ISO 11806-1:2020, for a list of significant hazards.

This part of ISO 11806 is applicable to portable, hand-held, powered brush-cutters and grass-trimmers

manufactured after its date of publication.

This part of ISO 11806 is not applicable to machines equipped with metallic cutting attachments

consisting of more than one piece, e.g. pivoting chains or flail blades.
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 4413:2010, Hydraulic fluid power — General rules and safety requirements for systems and their

components

ISO 4414:2010, Pneumatic fluid power — General rules and safety requirements for systems and their

components

ISO 11806-1:2020, Agricultural and forestry machinery — Safety requirements and testing for portable,

hand- held, powered brush-cutters and grass-trimmers — Part 1: Machines fitted with an integral

combustion engine

ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction

ISO 13857:2019, Safety of machinery — Safety distances to prevent hazard zones being reached by upper

and lower limbs
© ISO 2020 – All rights reserved 1
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oSIST prEN ISO 11806-2:2020
ISO/DIS 11806-2:2020(E)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 11806-1 and the following apply.

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

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

Note 1 to entry Figure 1 provides an example of a brush-cutter with a back-pack power unit falling within the

scope of this part of ISO 11806.
3.1
appliance
assembly of drive shaft tube, cutting attachment with its guard and handles
3.2
machine

complete brush-cutter (or grass-trimmer), including back-pack power unit and appliance

Key
1 harness
2 back-pack power unit
3 barrier
4 blade
5 cutting-attachment guard
6 drive-shaft tube
7 front handle
8 rear handle
Figure 1 — Example of a brush-cutter with back-pack power unit
2 © ISO 2020 – All rights reserved
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oSIST prEN ISO 11806-2:2020
ISO/DIS 11806-2:2020(E)
4 Safety requirements and/or protective measures
4.1 General

Machines shall comply with the safety requirements and/or protective measures of this clause. In

addition, the machine shall be designed according to the principles of ISO 12100 for relevant but not

significant hazards which are not dealt with by this part of ISO 11806.
Machines shall comply with ISO 11806-1:2020, Clause 4, except for 4.5.

The safe operation of a brush-cutter and a grass-trimmer also depends on the safe environment

associated with the use of personal protective equipment (PPE), such as gloves, slip-resistance

footwear, and leg, eye and hearing protective equipment, as well as safe working procedures (see

ISO 11806-1:2020, 5.1).

If a grass-trimmer can be converted to a brush-cutter then the converted machine shall comply with

requirements for a brush-cutter and vice versa.

Except where otherwise specified in this part of ISO 11806, the safety distances specified in

ISO 13857:2019,
4.2.4.1 and 4.2.4.3, shall be met.
4.2 Distance to cutting attachment
4.2.1 Requirements

Machines with front and rear handles shall have a minimum straight-line distance of 1 200 mm from

the mid- point of the rear handle to the nearest unguarded point of the cutting attachment (point A in

Figure 2). Point A is the intersection between the plane perpendicular to the cutting path and the side-

edge of the cutting- attachment guard.
This minimum distance shall apply to all recommended cutting attachments.
4.2.2 Verification
The distance shall be verified by measurement.
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oSIST prEN ISO 11806-2:2020
ISO/DIS 11806-2:2020(E)
Dimensions in millimetres
Key
1 cutting attachment
2 guard
3 front handle
4 rear handl
...