SIST EN ISO 9241-5:2001

SLOVENSKI STANDARD
01-junij-2001
Ergonomske zahteve za pisarniško delo s slikovno zaslonsko opremo - 5. del:
Ureditev delovnega mesta in zahteve za položaj telesa (ISO 9241-5:1998)
Ergonomic requirements for office work with visual display terminals (VDTs) - Part 5:
Workstation layout and postural requirements (ISO 9241-5:1998)
Ergonomische Anforderungen für Bürotätigkeiten mit Bildschirmgeräten - Teil 5:
Anforderungen an Arbeitsplatzgestaltung und Körperhaltung (ISO 9241-5:1998)
Exigences ergonomiques pour travail de bureau avec terminaux a écrans de
visualisation (TEV) - Partie 5: Aménagement du poste de travail et exigences relatives
aux postures (ISO 9241-5:1998)
Ta slovenski standard je istoveten z: EN ISO 9241-5:1999
ICS:
13.180 Ergonomija Ergonomics
35.180 Terminalska in druga IT Terminal and other
periferna oprema IT peripheral equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 9241-5
First edition
1998-10-01
Ergonomic requirements for office work
with visual display terminals (VDTs) —
Part 5:
Workstation layout and postural requirements
Exigences ergonomiques pour travail de bureau avec terminaux à écrans
de visualisation (TEV) —
Partie 5: Aménagement du poste de travail et exigences relatives aux
postures
A
Reference number
ISO 9241-5:1998(E)
ISO 9241-5:1998(E)
Contents
Page
1 Scope. 1
2 Normative references . 1
3 Definitions . 1
4 Guiding principles . 4
4.1 General considerations. 4
Versatility and flexibility .
4.2 4
4.3 Fit. 4
Postural change.
4.4 5
4.5 User information . 5
4.6 Maintainability-adaptability. 5
5 Design requirements and recommendations. 5
5.1 General. 5
5.2 Postures . 6
5.3 Ease of adjustment. 9
5.4 Support surfaces . 9
5.5 Work chair . 11
5.6 Additional support elements . 14
5.7 Layout of workstations within the work space . 15
6 Conformance . 16
7 Measurement. 16
7.1 Support surfaces . 16
7.2 Safety and stability aspects of workstations. 17
7.3 Seat height . 17
©  ISO 1998
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet iso@iso.ch
Printed in Switzerland
ii
©
ISO ISO 9241-5:1998(E)
7.4 Castors . 17
7.5 Layout of workstations within the workspace . 17
Annex A (informative) Anthropometric data needed for workstation
design and selection . 18
Bibliography . 25
iii
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ISO 9241-5:1998(E) ISO
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 collab-
orates closely with the International Electrotechnical Commission (IEC) on
all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard ISO 9241-5 was prepared by Technical Committee
ISO/TC 159, Ergonomics, Sub-committee SC 4, Ergonomics of human-
system interaction, Working Group WG 3, Control, workplace and
environmental requirements.
ISO 9241 consists of the following parts, under the general title Ergonomic
requirements for office work with visual display terminals (VDTs):
� Part 1: General introduction
� Part 2: Guidance on task requirements
� Part 3: Visual display requirements
� Part 4: Keyboard requirements
� Part 5: Workstation layout and postural requirements
� Part 6: Guidance on the work environment
� Part 7: Requirements for display with reflections
� Part 8: Requirements for displayed colours
� Part 9: Requirements for non-keyboard input devices
� Part 10 Dialogue principles
� Part 11: Guidance on usability
� Part 12: Presentation of information
� Part 13: User guidance
� Part 14: Menu dialogues
� Part 15: Command dialogues
� Part 16: Direct-manipulation dialogues
�
Part 17: Form filling dialogues
Annex A of this part of ISO 9241 is for information only.
iv
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ISO ISO 9241-5:1998(E)
Introduction
The purpose of this part of ISO 9241 is to promote and enhance
performance and comfort while minimizing risks to users’ safety and health.
Users of visual display terminals (VDTs) in office work typically adopt a
range of postures (seated with leaning, upright or reclining torso, standing
or a combination of both). Workplaces which accommodate such usage
can encourage movement, promote comfort and reduce physical, mental
and visual problems.
This part of ISO 9241 is intended for use by product and workstation
designers and implementers.
While drafting the text, the concept concerning the Frankfurt Plane was
discussed but not included. The concept will be considered in a revision of
this part of ISO 9241 in due course.
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INTERNATIONAL STANDARD  ISO ISO 9241-5:1998(E)
Ergonomic requirements for office work with visual display
terminals (VDTs) —
Part 5:
Workstation layout and postural requirements
1 Scope
This part of ISO 9241 specifies ergonomic guiding principles which apply to the user requirements, design, and
procurement of workstation equipment for office tasks using VDTs.
In particular, the general principles and requirements specified in this part of ISO 9241 apply to the standards
specifying technical design of furniture and equipment constituting the workplace.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this part of
ISO 9241. At the time of publication, the editions indicated were valid. All standards are subject to revision, and
parties to agreements based on this part of ISO 9241 are encouraged to investigate the possibility applying the
most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid
International Standards.
ISO 6385:1981, Ergonomic principles in the design of work systems.
ISO 9241-2:1992, Ergonomic requirements for office work with visual display terminals (VDTs) — Part 2: Guidance
on task requirements.
ISO 9241-3:1992, Ergonomic requirements for office work with visual display terminals (VDTs) — Part 3: Visual
display requirements.
1)
ISO 9241-6:— , Ergonomic requirements for office work with visual display terminals (VDTs) — Part 6: Guidance
on the work environment.
3 Definitions
For the purposes of this part of ISO 9241, the following definitions apply.

1)  To be published.
©
ISO
ISO 9241-5:1998(E)
3.1
angle of view
angle between the line-of-sight and the line orthogonal to the surface of the display at the point where the line-of-
sight intersects the image surface of the display
[ISO 9241-3:1992]
3.2
anthropometry
study and measurement of the physical dimensions of the human body
3.3
armrest
support for the lower arms
3.4
back rest
part of a work chair which provides support for the back
3.5
castor
wheeled component on the bottom of furniture to facilitate appropriate movement on the floor surface
3.6
design reference posture
posture specified for the purpose of workstation design to define relative positions and dimensions
3.7
deviation
alteration from the neutral position
3.8
dynamic posture
body position which changes, with relative movements of the limbs or other parts of the human body in relation to
one another or with respect to a fixed object (such as a workstation)
3.9
extension
movement that increases the angle between two adjacent bones; hand extension is the movement of the hand in
the dorsal direction
NOTE  Dorsal pertains to the back of the hand, palmar to the palm.
3.10
flexion
movement that decreases the angle between two adjacent bones; hand flexion is the movement of the hand in the
palmar direction
NOTE  Palmar pertains to the palm of the hand.
3.11
gloss
the mode of appearance by which reflected highlights of objects are perceived as superimposed on the surface due
to the directionally selective properties of that surface
[CIE Publ. 17.4:1987; IEC 845-04-73]
3.12
gloss unit
measure for quantifying the gloss of a surface
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ISO
ISO 9241-5:1998(E)
3.13
kyphosis
convex curvature of the thoracic spine
3.14
intended user population
group of human beings for which a product or a workstation is designed
EXAMPLE  Male and female workers of South-East Asian origin aged between 45 and 65 years.
3.15
line-of-sight angle
the angle between a horizontal line and the visual axis of the eye (the line connecting the point of fixation and the
centre of the pupil)
3.16
lordosis
concave curvature of the spine
3.17
lumbar
region of the back between the thorax and the pelvis
3.18
popliteal
of or pertaining to the back of the knee
3.19
posture
overall position of the body, or body parts in relation to each other, with respect to the workplace and its
components
3.20
reference plane
surface designed to support the feet
NOTE  If not otherwise indicated, the reference plane is the ground. Any other level higher or lower than the ground level may
be used as a reference plane for the calculation of the height of support surfaces.
3.21
static posture
adoption of a body position which is fixed over time and where there is muscle contraction without motion
3.22
task analysis
analytical process employed to determine the specific behaviours required of people when operating equipment or
doing work
NOTE  The task analysis is not a risk assessment of the workplace according to legal requirements.
3.23
workplace
arrangement of workstations allocated to one person to complete a work task
3.24
work space
volume of space allocated to one or more persons in the work system to complete a work task
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ISO
ISO 9241-5:1998(E)
3.25
worksurface
surface on which equipment and task materials are used
3.26
workstation
assembly comprising display equipment with or without a central processing unit, which may be provided with a
keyboard and/or input device and/or software determining the operator/machine-interface, optional accessories,
peripherals and the immediate work environment
4 Guiding principles
4.1 General considerations
Workplace design should be preceded by an analysis of the tasks that it is to support. Such an analysis should give
information about the different tasks and sub-tasks which are performed and about the use of related equipment. It
should also identify the relative priority given to different information sources within the user’s task with respect to
placement of displays, equipment location and job aids. For example, in many data-entry tasks, viewing of the hard
copy has greater priority than viewing of the display.
The task analysis should include consideration of
a) major tasks and their inter-relationships: frequency, importance, position of visual objects, duration and type
of use of all associated equipment and their interrelationships, (see ISO 9241-2);
b) the position and use of the hands: implications for posture, reach, and device manipulation by the relative
positioning of VDT equipment and task materials, frequency, duration and complexity of movements.
For the design and selection of workplaces for VDT office tasks the following five interrelated principles apply:
— versatility-flexibility;
— fit;
— postural change;
— user information;
...