ISO 11660-2:2015

INTERNATIONAL ISO
STANDARD 11660-2
Redline version
compares Second edition to
First edition
Cranes — Access, guards and
restraints —
Part 2:
Mobile cranes
Appareils de levage à charge suspendue — Moyens d’accès, dispositifs
de protection et de retenue —
Partie 2: Grues mobiles
Reference number
ISO 11660-2:redline:2015(E)
©
ISO 2015

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ISO 11660-2:redline:2015(E)

IMPORTANT — PLEASE NOTE
This is a mark-up copy and uses the following colour coding:
Text example 1 — indicates added text (in green)
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Text example 2
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1.x . — Heading numbers containg modifications are highlighted in yellow in
the Table of Contents
All changes in this document have yet to reach concensus by vote and as such should only
be used internally for review purposes.
DISCLAIMER
This Redline version provides you with a quick and easy way to compare the main changes
between this edition of the standard and its previous edition. It doesn’t capture all single
changes such as punctuation but highlights the modifications providing customers with
the most valuable information. Therefore it is important to note that this Redline version is
not the official ISO standard and that the users must consult with the clean version of the
standard, which is the official standard, for implementation purposes.
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ISO 11660-2:redline:2015(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 General Terms and definitions . 1
4 Definitions . 2
5 General criteria . 4
6 4 Performance criteria Access. 5
6.1 4.1 General . 5
6.2 4.2 Requirements . 5
4.2.1 General design requirements for access . 5
4.2.2 Compliance with ISO 11660-1 . 5
7 Steps. 6
8 Ladders . 8
9 Stairways . 8
10 Handrails and handholds . 9
11 Platforms, passageways, walkways, guardrails and foot barriers .10
12 Enclosure openings .11
13 Powered or manually actuated access devices .13
14 Guards and restraints .14
Annex A (informative) Examples of surfaces considered to be slip-resistant .15
Annex В (informative) Bibliography .16
Bibliography .17
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ISO 11660-2:redline: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.
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 voteThe 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
International Standard ISO 11660-2 was prepared by Technical CommitteeThe committee responsible
for this document is ISO/TC 96, Cranes, Subcommittee SC 6, Mobile cranes.
This second edition cancels and replaces the first edition (ISO 11660-2:1994), which has been technically
revised.
ISO 11660 consists of the following parts, under the general title Cranes — Access, guards and restraints:
— Part 1: General
— Part 2: Mobile cranes
— Part 3: Tower cranes
— Part 4: Jib cranes
— Part 5: Bridge and gantry cranes
Annexes A and B of this part of ISO 11660 are for information only.
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INTERNATIONAL STANDARD ISO 11660-2:redline:2015(E)
Cranes — Access, guards and restraints —
Part 2:
Mobile cranes
1 Scope
This part of ISO 11660 specifies criteria for steps, stairways, ladders, walkways, platforms, handrails,
handholds, guardrails and entrance openings which permit access to and from operator, inspection
or maintenance platforms onestablishes the particular requirements relating to access, guards and
restraints for mobile cranes as defined in ISO 4306-21 and parked in accordance with the manufacturer’s
instruction. It also presents requirements for guards and restraints as related to moving parts.
This part of ISO 11660-1 is also based on and partly in harmony withestablishes the general requirements
for access to control stations and other areas of cranes as defined in ISO 2860ISO 4306-1, during
normal operations, maintenance, inspection, erection and ISO 2867. For mobile cranes fitted with a
towerdismantling. It also deals with ISO 11660-3guards and ISO 11660-4 should be consultedrestraints
in general, concerning the protection of persons on or near the crane with regard to moving parts,
falling objects or live parts.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions
of this part ofreferenced documents are indispensable for the application of this ISO 11660. At the time
of publication, the editions indicated were valid. All standards are subject to revision, and parties to
agreements based on this part ofdocument. For dated references only the edition cited applies. For
undated references, ISO 11660 are encouraged to investigate the possibility of applying the most recent
editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid
International Standardsthe latest edition of the referenced document (including any amendments)
applies.
1)
ISO 4306-2:— 11660-1:2008 , Cranes — Vocabulary Access, guards and restraints — Part 2: Mobile
cranes. 1: General
2)
ISO 11660-1:— 4306-2 , Cranes — Access, guards and restraints Vocabulary — Part 1: General. 2: Mobile
cranes
3 General Terms and definitions
3.1 The requirements given in this part of ISO 11660 are based on one person, unladen, using the access
system by himself, i.e. no other coworkers are on the access system, and on the 95th to 5th percentile
human physical dimensions as presented in ISO 3411.
It shall also be recognized that some machine designs may require modifications or variances from the
requirements presented in this part of ISO 11660.
For the purposes of this document, the terms and definitions given in ISO 11660-1 apply.
1) To be published. (Revision of ISO 4306-2:1985)
2) To be published.
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ISO 11660-2:redline:2015(E)

4 Definitions
For the purposes of this part of ISO 11660, the following definitions apply.
4.1
access system
System provided on a machine for entrance to and exit from an operator, inspection or maintenance
platform from and to the ground.The primary access system is the access system normally used, while
the alternative access system is the access route used during anticipated emergency situations when the
primary access system cannot be used.
4.2
jib walkway
Walkway used mainly on long jibs, such as on dragline cranes, which are inclined at angles up to 20°
from the horizontal.
4.3
jib skywalk platform
Maintenance platform on jib base sections.
4.4
controlled descent device
Device which can automatically lower a person without power at a fixed speed as part of an alternative
access system.
4.5
enclosure opening
Opening leading to or from an access system and large enough for a person to pass through.
4.5.1
primary opening
Opening normally used for access.
4.5.2
alternative opening
Opening for use during emergencies when the primary opening is not usable.
4.5.3
service opening
Opening for use during maintenance, service or inspection.
4.6
foot barrier
Device to prevent a person’s foot from slipping off the edge of a platform or walkway.
4.7
guardrail
Device along the open sides of walkways or platforms to protect a person from falling.
4.8
handrail and handhold
Parts of an access system that may be grasped by the hand as an aid to body support and balance.
4.9
ladder
Access system or part of an access system, inclined from the horizontal at an angle greater than 50° but
not more than 90°, consisting of a series of equally spaced steps that can accommodate one or both feet.
4.9.1
vertical ladder
Ladder whose angle of inclination from the horizontal is greater than 75°.
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ISO 11660-2:redline:2015(E)

4.9.2
inclined ladder
Ladder whose angle of inclination from the horizontal is greater than 50° but not more than 75°.
4.9.3
rung ladder
Ladder consisting of side rails and rungs which can accommodate both feet, used for access where the
angle of inclination from the horizontal exceeds 75°.
4.9.4
stepped ladder
Ladder consisting of side rails and steps which can accommodate both feet, used for access where the
angle of inclination from the horizontal exceeds 65°.
4.10
ladder fall-limiting device
Any device which minimizes or limits the length of fall from a ladder system.
4.11
operator’s platform
Area from which an operator controls the travel and work functions of the machine.
4.12
passageway
Walkway with confining barriers on both sides that extend vertically above the walking surface to a
height of at least 1 200 mm for erect walking or 300 mm for crawling.
4.13
platform
Horizontal surface for the support of persons engaged in operation, maintenance, inspection or repair
work.
4.14
ramp
Plane inclined at an angle of 20° or less from the horizontal, without steps, but with cleats or other
surface treatment for the purpose of traction.
4.15
cleat
Device added to a walkway or ramp surface to improve traction.
4.16
rest platform
landing
Platform used in conjunction with a ladder system for a person to rest on while standing.
4.17
riser height
Height between two consecutive steps or rungs, measured from the tread surface of one step or rung to
the tread surface of the next.
4.18
rung
Device on which one or both feet may be placed, generally installed on vertical ladders or on a single
foot-step.
4.19
stairway
Access system or part of an access system inclined from the horizontal at an angle greater than 33,7° but
not more than 67° and consisting of four or more steps.
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ISO 11660-2:redline:2015(E)

4.20
step
Device for placement of one or both feet, either as part of a ladder or stairway, or installed (placed)
individually.
4.21
stride distance
Horizontal distance from the leading edge of one step to the leading edge of the next step.
4.22
three-point support
Feature of an access system which permits, but does not require, a person to use simultaneously two
hands and one foot or two feet and one hand, while ascending, descending or moving about on the crane.
4.23
tread depth
Distance from the leading edge to the back of the step.
4.24
walkway
Part of an access system that permits walking or crawling between locations on a crane.
4.25
powered or manually actuated access device
Device that through power or manual actuation provides a complete or partial primary access or
alternative access system.
4.26
slip-resistant surface
Access system surface having qualities which improve the traction obtained by the foot.Annex A presents
examples of surfaces that are considered “slip-resistant”.
5 General criteria
5.1 Access system design shall consider:
a) the probability of a user being inadvertently restrained by protruding devices such as controls,
steps or handles catching or holding body appendages or wearing apparel;
b) protrusions which could trip the user or increase the severity of an injury in case of a fall;
c) providing handrails or handholds with a smooth handgrasp surface;
d) the probability of user contact with potential hazards such as extreme differences in heat or cold,
electrical hazards, moving parts and sharp corners;
e) use of the access system shall be easily understood and require no training;
f) proper placement of components offering three-point support to the user ascending or descending
the access system when more than 1 m above the ground.
5.2 Primary access system devices may be portable for convenient storage on the crane but shall be
capable of being positively secured when in use or in the stored position.
5.3 An alternative exit shall be provided and shall be clearly indicated if not obvious.
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ISO 11660-2:redline:2015(E)

6 4 Performance criteria Access
6.1 4.1 General
The walking and standing surfaces of access systems shall withstand, without visible permanent
deformation, the following minimum forces applied perpendicular to the surfaceAll control stations
shall be accessible from the ground or by means of walkway(s), stairs, ladders and/or landings.
a) 2 000 N concentrated through a 125 mm diameter disc applied at any location on the surface; and
b) 4 500 N uniformily distributed per square metre of surface area or fraction thereof if less than a
square metre.
These forces need not be applied simultaneouslyOther parts of the crane that require frequent access
(i.e. weekly) for operation or maintenance shall b
...