EN ISO 14120:2015

SLOVENSKI STANDARD
01-februar-2016
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SIST EN 953:2000+A1:2009
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Safety of machinery - Guards - General requirements for the design and construction of
fixed and movable guards (ISO 14120:2015)
Sicherheit von Maschinen - Trennende Schutzeinrichtungen - Allgemeine Anforderungen
an Gestaltung und Bau von feststehenden und beweglichen trennenden
Schutzeinrichtungen (ISO 14120:2015)
Sécurité des machines - Protecteurs - Prescriptions générales pour la conception et la
construction des protecteurs fixes et mobiles (ISO 14120:2015)
Ta slovenski standard je istoveten z: EN ISO 14120:2015
ICS:
13.110 Varnost strojev Safety of machinery
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 14120
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2015
EUROPÄISCHE NORM
ICS 13.110 Supersedes EN 953:1997+A1:2009
English Version
Safety of machinery - Guards - General requirements for
the design and construction of fixed and movable guards
(ISO 14120:2015)
Sécurité des machines - Protecteurs - Prescriptions Sicherheit von Maschinen - Trennende
générales pour la conception et la construction des Schutzeinrichtungen - Allgemeine Anforderungen an
protecteurs fixes et mobiles (ISO 14120:2015) Gestaltung, Bau und Auswahl von feststehenden und
beweglichen trennenden Schutzeinrichtungen (ISO
14120:2015)
This European Standard was approved by CEN on 3 October 2015.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14120:2015 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC. 4

European foreword
This document (EN ISO 14120:2015) has been prepared by Technical Committee ISO/TC 199 "Safety of
machinery" in collaboration with Technical Committee CEN/TC 114 “Safety of machinery” the
secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by May 2016, and conflicting national standards shall be
withdrawn at the latest by May 2016.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN 953:1997+A1:2009.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this
document.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 14120:2015 has been approved by CEN as EN ISO 14120:2015 without any modification.
Annex ZA
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC
This European Standard has been prepared under a mandate given to CEN by the European
Commission and the European Free Trade Association to provide a means of conforming to Essential
Requirements of the New Approach Directive Machinery 2006/42/EC.
Once this standard is cited in the Official Journal of the European Union under that Directive and has
been implemented as a national standard in at least one Member State, compliance with the normative
clauses of this standard confers, within the limits of the scope of this standard, a presumption of
conformity with the relevant Essential Requirements of that Directive and associated EFTA regulations.

WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling
within the scope of this standard.
INTERNATIONAL ISO
STANDARD 14120
Second edition
2015-11-01
Safety of machinery — Guards
— General requirements for the
design and construction of fixed and
movable guards
Sécurité des machines — Protecteurs — Prescriptions générales pour
la conception et la construction des protecteurs fixes et mobiles
Reference number
ISO 14120:2015(E)
©
ISO 2015
ISO 14120:2015(E)
© ISO 2015, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved

ISO 14120:2015(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Risk assessment . 8
5 General requirements for the design and construction of guards .8
5.1 Machine aspects . 8
5.1.1 General. 8
5.1.2 Access to hazard zones . 8
5.1.3 Containment of ejected parts and other impacts . 8
5.1.4 Containment of hazardous substances . 9
5.1.5 Noise . 9
5.1.6 Radiation . . 9
5.1.7 Potentially explosive atmosphere . 9
5.2 Human aspects . 9
5.2.1 General. 9
5.2.2 Safety distances . 9
5.2.3 Control of access to the hazard zone . 9
5.2.4 Viewing .10
5.2.5 Ergonomic aspects .10
5.2.6 Intended use .10
5.3 Guard design and construction aspects.11
5.3.1 General.11
5.3.2 Crushing or trapping points .11
5.3.3 Durability .11
5.3.4 Hygiene .11
5.3.5 Cleaning .11
5.3.6 Exclusion of contaminants .11
5.3.7 Sharp edges, etc. .11
5.3.8 Integrity of joints .11
5.3.9 Removal of fixed guards.11
5.3.10 Mounting of removable fixed guards .12
5.3.11 Adjustable guards .12
5.3.12 Movable guards .12
5.3.13 Closed position of movable guards .12
5.3.14 Interlocking guards with a start function (control guards) .12
5.4 Materials, rigidity, and impact requirements .13
5.4.1 General.13
5.4.2 Impact and ejection resistance .13
5.4.3 Rigidity .13
5.4.4 Secure fixing.13
5.4.5 Reliability of moving parts .13
5.5 Containment .13
5.6 Resistance to corrosion .13
5.7 Resistance to microorganisms .13
5.8 Non-toxicity .14
5.9 Machine viewing .14
5.10 Transparency .14
5.11 Shadows and stroboscopic effects .14
5.12 Electrostatic properties .14
5.13 Guards with electrically conductive parts .14
ISO 14120:2015(E)
5.14 Thermal stability .14
5.15 Fire and flammability .14
5.16 Noise and vibration reduction .15
5.17 Radiation protection .15
5.18 Climbing .15
5.19 Retained fastenings .15
5.20 Vibration resistance .15
5.21 Warning signs .15
5.22 Colour .16
5.23 Appearance .16
6 Selection of types of guards .16
6.1 General .16
6.2 Combination of different guards or of guards with other devices .16
6.3 Selection of guards according to the number and size of the hazards .17
6.4 Selection of guards according to the nature and frequency of access required .18
6.4.1 General.18
6.4.2 Moving transmission parts .18
6.4.3 Where access is not required during use .18
6.4.4 Where access is required during use .18
7 Verification of the safety requirements for guards .19
7.1 General .19
7.2 Verification and validation methods .19
7.3 Required verification and validation .19
8 Information for use .23
8.1 General .23
8.2 Guard hazards .23
8.3 Installation .23
8.4 Operation .23
8.5 Removal of guards .23
8.6 Inspection and maintenance .24
Annex A (informative) Example of retained fastening .25
Annex B (informative) Example of projectile test method for mechanically testing guards .26
Annex C (informative) Example of pendulum test method for mechanically testing guards .30
Annex D (informative) Relationship between International Standards referenced in
Clause 2 and corresponding European Standards .34
Bibliography .35
iv © ISO 2015 – All rights reserved

ISO 14120:2015(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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 199, Safety of machinery.
This second edition cancels and replaces the first edition (ISO 14120:2002), which has been technically
revised. The main changes from the previous edition are as follows.
— Definitions have been brought into line with ISO 12100. The figures showing examples of guards
have been updated where appropriate.
— Clause 5 has been updated with new references to ISO 13855 and ISO 14119. Requirements on the
removal of guards have been amended. Subclause 5.3.9 describes requirements for the removal
of fixed guards only with a tool. In addition, there is a requirement that fixed guards be designed
to prevent easy removal. The subclause about impact and ejection resistance (5.4) has been
strengthened. Subclauses on Climbing (5.18), Retained fastenings (5.19), Warning signs (5.21),
Colour (5.22) and Appearance (5.23) have been added.
— Clause 6 has been amended and updated to better include cover combinations of different guards or
of guards with other devices. Selection of guards according to the number and size of the hazards
(6.3) has been changed and updated. Subclause 6.4.4.2, where access is required during the working
cycle, has been changed and updated.
— Clauses on verification and validation have been introduced (Clause 7). This includes a table which
outlines the safety requirements and/or measures by subclause.
— The text of Clause 8 has been updated, including requirements for procedures for removal of guards
(use of a tool and the safe working procedure). The subclause for removal of guards (8.5) has changed.
— Two new informative annexes on test methods, one on projectile tests and the other on impact tests,
have been added.
— The Bibliography, which contains a list of International and European Standards published or in
preparation that can be helpful in the design and commissioning of guards, has been updated.
ISO 14120:2015(E)
Introduction
The structure of safety standards in the field of machinery is as follows:
a) type-A standards (basic safety standards) giving basic concepts, principles for design, and general
aspects that can be applied to all machinery;
b) type-B standards (generic safety standards) dealing with one safety aspect or one or more type(s)
of safeguard that can be used across a wide range of machinery:
— type-B1 standards on particular safety aspects (e.g. safety distances, surface temperature, noise);
— type-B2 standards on safeguards (e.g. two-hand controls, interlocking devices, pressure-
sensitive devices, guards);
c) type-C standards (machine safety standards) dealing with detailed safety requirements for a
particular machine or group of machines.
This International Standard is a type-B2 standard as stated in ISO 12100.
Guards provide a risk reduction for both protection against unintended access and against ejected
parts and substances. The guarding can also give protection against others hazards, e.g. noise, fire,
biological hazards, and radiation.
The requirements of this document can be supplemented or modified by a type-C standard.
For machines that are covered by the scope of a type-C standard and that have been designed and built
according to the requirements of that standard, the requirements of that type-C standard take precedence.
vi © ISO 2015 – All rights reserved

INTERNATIONAL STANDARD ISO 14120:2015(E)
Safety of machinery — Guards — General requirements for
the design and construction of fixed and movable guards
1 Scope
This International Standard specifies general requirements for the design, construction, and selection
of guards provided to protect persons from mechanical hazards.
This International Standard indicates other hazards that can influence the design and construction of
guards.
This International Standard applies to guards for machinery which will be manufactured after it is
published.
The requirements are applicable if fixed and movable guards are used. This International Standard
does not cover interlocking devices. These are covered in ISO 14119.
This International Standard does not provide requirements for special systems relating specifically to
mobility such as ROPS (rollover protective structures), FOPS (falling-object protective structures), and
TOPS (tip over protective structures) or to the ability of machinery to lift loads.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction
ISO 13855, Safety of machinery — Positioning of safeguards with respect to the approach speeds of parts
of the human body
ISO 13857, Safety of machinery — Safety distances to prevent hazard zones being reached by upper
and lower limbs
ISO 14119, Safety of machinery — Interlocking devices associated with guards — Principles for design
and selection
ISO 14123-1, Safety of machinery — Reduction of risks to health from hazardous substances emitted by
machinery — Part 1: Principles and specifications for machinery manufacturers
ISO 14159, Safety of machinery — Hygiene requirements for the design of machinery
IEC 60204-1:2005, Safety of machinery — Electrical equipment of machines — Part 1: General requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12100 and the following apply.
3.1
guard
physical barrier, designed as part of the machine, to provide protection
Note 1 to entry: A guard may act either
ISO 14120:2015(E)
— alone, in which case it is only effective when “closed” (for a movable guard) or “securely held in place” (for a
fixed guard), or
— in conjunction with an interlocking device with or without guard locking, in which case protection is ensured
whatever the position of the guard.
Note 2 to entry: Depending on its construction, a guard may be described as, for example, casing, shield, cover,
screen, door, enclosing guard.
Note 3 to entry: The terms for types of guards are defined in ISO 12100:2010, 3.27.1 to 3.27.6. See also
ISO 12100:2010, 6.3.3.2 for types of guards and their requirements.
[SOURCE: ISO 12100:2010, 3.27]
3.2
fixed guard
guard affixed in such a manner (for example, by screws, nuts, and welding) that it can only be opened or
removed by the use of tools or by destruction of the means by which the guard is affixed
[SOURCE: ISO 12100:2010, 3.27.1]
3.2.1
enclosing guard
guard which prevents access to the hazard zone from all sides
Note 1 to entry: See Figure 1.
Figure 1 — Example of an enclosing guard totally preventing access to transmission machinery
3.2.2
distance guard
guard which does not completely enclose a hazard zone, but which prevents or reduces access by virtue
of its dimensions and its distance from the hazard zone, for example perimeter fence or tunnel guard
Note 1 to entry: A distance guard can be partially or fully surrounding.
2 © ISO 2015 – All rights reserved

ISO 14120:2015(E)
Note 2 to entry: See Figures 2 and 3.
Figure 2 — Example of a distance guard
Figure 3 — Example of a distance guard: tunnel guard providing protection at machine feed or
discharge area
3.3
movable guard
guard which can be opened without the use of tools
[SOURCE: ISO 12100:2010, 3.27.2]
3.3.1
power-operated guard
movable guard that is operated with the assistance of power from a source other than persons or gravity
ISO 14120:2015(E)
3.3.2
self-closing guard
automatically adjustable guard
movable guard operated by a machine element (e.g. moving table) or by the workpiece or a part of the
machining jig, so that it allows the workpiece (and the jig) to pass and then automatically returns (by
means of gravity, a spring, other external power, etc.) to the closed position as soon as the workpiece
has vacated the opening through which it has been allowed to pass
Note 1 to entry: See Figure 4.
Figure 4 — Example of a self-closing guard
3.4
adjustable guard
guard which is adjustable as a whole or which incorporates adjustable part(s)
[SOURCE: ISO 12100:2010, 3.27.3]
3.4.1
manually adjustable guard
adjustable guard where the adjustment is made manually and the adjustment remains fixed during a
particular operation
Note 1 to entry: See Figure 5.
4 © ISO 2015 – All rights reserved

ISO 14120:2015(E)
Figure 5 — Example of an adjustable guard for a radial or pedestal drilling machine
3.5
interlocking guard
guard associated with an interlocking device so that, together with the control system of the machine,
the following functions are performed:
— the hazardous machine functions “covered” by the guard cannot operate until the guard is closed;
— if the guard is opened while hazardous machine functions are operating, a stop command is given;
— when the guard is closed, the hazardous machine functions “covered” by the guard can operate (the
closure of the guard does not, by itself, start the hazardous machine functions)
Note 1 to entry: See Figure 6 and 7.
Note 2 to entry: See ISO 14119 about interlocking devices.
[SOURCE: ISO 12100:2010, 3.27.4]
ISO 14120:2015(E)
Figure 6 — Example of interlocking hinged guards; these enclose the hazard zone when closed
Figure 7 — Example of interlocking sliding guards
3.5.1
interlocking guard with a start function
control guard
special form of interlocking guard which, once it has reached its closed position, gives a command to
initiate the hazardous machine function(s) without the use of a separate start control
Note 1 to entry: ISO 12100:2010, 6.3.3.2.5, gives detailed provisions regarding the conditions of use for a control
guard (see also 5.3.14).
[SOURCE: ISO 12100:2010, 3.27.6]
3.5.2
interlocking guard with guard locking
guard associated with an interlocking device and a guard locking device so that, together with the
control system of the machine, the following functions are performed:
6 © ISO 2015 – All rights reserved

ISO 14120:2015(E)
— the hazardous machine functions “covered” by the guard cannot operate until the guard is
closed and locked;
— the guard remains closed and locked until the risk due to the hazardous machine functions “covered”
by the guard has disappeared;
— when the guard is closed and locked, the hazardous machine functions “covered” by the guard
can operate (the closure and locking of the guard do not, by themselves, start the hazardous
machine functions)
Note 1 to entry: See ISO 14119 about interlocking devices.
Note 2 to entry: See Figure 8.
[SOURCE: ISO 12100:2010, 3.27.5]
Key
1 example of guard locking device
Figure 8 — Example of safeguarding using fixed distance guards and interlocking guards with
guard locking
3.6
closed position
position of a guard so that it performs the function for which it was designed
Note 1 to entry: The function can be to prevent/reduce access to the hazard zone, and/or prevent ejection of
parts of the machine or the workpiece, and/or reduce exposure to hazards such as noise, radiation, etc.
Note 2 to entry: Open guard — guard which is not in closed position.
3.7
tool
implement such as a key or wrench designed to open and close a fastener
Note 1 to entry: An improvised implement, such as a coin or a nail-file, cannot be considered as a tool.
ISO 14120:2015(E)
3.8
use of a tool
action by a person under known and predetermined circumstances as part of a safe working procedure
3.9
frequency of access
number of occasions on which access is required or foreseeable within the guarded area per unit of time
4 Risk assessment
In order to select and design types of guards appropriate to particular machinery, it is important
to assess the risk arising from the various hazards present at that machinery and the foreseeable
categories of persons who can be exposed to the hazard(s) (see ISO 12100:2010, Clause 5).
5 General requirements for the design and construction of guards
5.1 Machine aspects
5.1.1 General
Proper consideration of foreseeable aspects of the machine environment and operation throughout
the foreseeable life of the machine is necessary in the design and application of guards. Inadequate
consideration of these aspects can lead to hazardous situations where machinery operation is hindered.
This can lead to persons defeating the guards provided, thus, exposing them to greater risk.
5.1.2 Access to hazard zones
To minimize access to hazard zones where practicable, guards and machinery shall be so designed
as to enable routine adjustments, lubrication, and maintenance to be carried out without opening or
removing the guards.
Where access is required within the guarded area, this shall be as free and unobstructed as practicable.
The following are examples of reasons for access:
— loading and unloading;
— tool changing and setting;
— measurement, gauging, and sampling;
— maintenance and repair;
— lubrication;
— removal of waste material (for example scrap, swarf, spillage);
— obstruction removal;
— cleaning and hygiene.
5.1.3 Containment of ejected parts and other impacts
Where there is a foreseeable risk of
— ejection of parts (for example workpiece or broken tooling) from the machine,
— impacts from parts of machinery, or
— impacts from the operator,
8 © ISO 2015 – All rights reserved

ISO 14120:2015(E)
the guard shall, as far as practicable, be designed and constructed so as to contain and withstand such
ejections and impacts. See Annexes B and C for options.
5.1.4 Containment of hazardous substances
Where there is a foreseeable risk of emission from the machine of hazardous substances (for example
coolant, vapours, gases, swarf, sparks, hot or molten material, dust, solid, or fluid matter), the guard
shall be designed according to ISO 14123-1 to contain these substances as far as practicable.
If a guard forms part of an extraction system, this function shall be considered in the design, selection
of materials, construction, and positioning of the guard.
5.1.5 Noise
Where a requirement has been established to reduce machine noise, guards shall be designed and
constructed which will give the required noise reduction as well as providing protection against the
other hazards present at the machine (see also ISO 11200). Guards acting as acoustic enclosures shall
have adequately sealed joints to reduce the emission of noise.
NOTE More information can be found in ISO/TR 11688.
5.1.6 Radiation
Where there is a foreseeable risk of exposure to hazardous radiation, guards shall be designed and
appropriate materials shall be used in their construction to protect persons from the hazard, see
EN 12198-3. Examples include the use of darkened glazing (see ISO 25980 and EN 12254) to protect
from the effects of weld flash or the elimination of openings in a guard around a laser.
5.1.7 Potentially explosive atmosphere
Where there is foreseeable risk of explosion, guards shall be designed to contain or dissipate the
released energy in a safe manner and direction (for example by use of “explosion relief” panels) (see
also EN 1127-1).
A guard shall not be an ignition source. To prevent the guard from becoming an ignition source,
these aspects shall be considered (e.g. hot surfaces, mechanically generated sparks, electricity, static
electricity, electromagnetic waves, and ultrasonic).
NOTE Where a guard is designed to protect against fire additional information is given in ISO 19353.
5.2 Human aspects
5.2.1 General
Reasonably foreseeable aspects of human interaction with machinery (for example when loading,
maintaining or lubricating) shall be given proper consideration in the design and construction of guards.
5.2.2 Safety distances
Guards intended for preventing access to hazard zones shall be designed, constructed, and positioned to
prevent parts of the body from reaching hazard zones according to ISO 13857. For interlocked movable
guards, safety distances according to ISO 13855 shall also be fulfilled.
5.2.3 Control of access to the hazard zone
Movable guards shall be designed and positioned such that during normal operation they are prevented
from closing with persons in the hazard zone. Where this is not practicable, other means shall be used
to prevent persons from remaining undetected within the hazard zone. See ISO 12100:2010, 6.3.3.2.3.
ISO 14120:2015(E)
5.2.4 Viewing
Where viewing of the process is required, guards shall be designed and constructed to offer adequate
viewing. This can eliminate the need for defeating them. See also 5.9.
5.2.5 Ergonomic aspects
5.2.5.1 General
Guards shall be designed and constructed taking into account ergonomic principles [see
also ISO 12100:2010, 6.2.8 a) and c)].
5.2.5.2 Size, weight, and design
Removable sections of guards shall be designed to be of a suitable size, weight, and design to permit
ease of handling. Guards which cannot readily be moved or transported by hand shall be provided or be
capable of being provided with suitable attachment devices for transport by means of a lifting device.
The attachments or provisions can be, for instance,
— standard lifting appliances with slings, hooks, eyebolts, or simply tapped holes for appliance fixing,
— appliances for automatic grabbing with a lifting hook, when securing is not possible from the ground,
or
— lifting gear and appliances integrated into the guard.
When the mass of the guard or removable parts is sufficient to require the use of general lifting
machinery, an indication, on the guard itself and removable parts or in the information for use, of the
value of their mass expressed in kilograms (kg).
NOTE Where removable sections of guards are
...