SIST EN 81-21:2018

Safety rules for the construction and installation of lifts - Lifts for the transport of persons and goods - Part 21: New passenger and goods passenger lifts in existing building

This European Standard specifies the safety rules related to new passenger and goods/passenger lifts permanently installed in existing buildings where in some circumstances due to limitations enforced by building constraints, some requirements of EN 81-20:2014 cannot be met (see also 4th sentence of Introduction).
This European Standard addresses a number of these constraints and gives requirements for alternative solutions. It shall be read and applied in conjunction with the European Standards EN 81-20:2014.
This European Standard covers:
-   Either the construction and installation of one or more complete new lift(s) including new well and machinery spaces in an existing building; or
-   The replacement of one or more existing lift(s) by new ones in existing well(s) and machinery spaces.
This European Standard does not cover:
-   Replacement or modifications of some parts to a lift already installed;
-   Other applications outside of the scope of EN 81-20:2014.

Sicherheitsregeln für die Konstruktion und den Einbau von Aufzügen - Aufzüge für die Personen- und Gütertransport - Teil 21: Neue Personen- und Lastenaufzüge in bestehenden Gebäuden

Diese Europäische Norm legt Sicherheitsregeln für neue Personen- und Lastenaufzüge fest, die dauerhaft in bestehende Gebäude eingebaut werden, bei denen in manchen Fällen aufgrund von baulichen Einschrän-kungen einige Anforderungen von EN 81 20:2014 nicht erfüllt werden können.
Diese Europäische Norm befasst sich mit einer Anzahl dieser Einschränkungen und nennt Anforderungen für alternative Lösungen. Sie wird in Verbindung mit der Europäischen Norm EN 81 20:2014 verstanden und angewendet werden.
Diese Europäische Norm gilt entweder für:
-   die konstruktive Ausführung und den Einbau eines oder mehrerer vollständig neuer Aufzüge in ein bestehendes Gebäude einschließlich eines neuen Schachts und neuer Aufstellungsorte für Triebwerk und Steuerung; oder
-   den Austausch eines oder mehrerer vorhandener Aufzüge durch neue in dem (den) vorhandenen Schacht (Schächten) und Aufstellungsorten für Triebwerk und Steuerung.
Diese Europäische Norm gilt nicht für:
-   den Austausch oder die Änderungen einzelner Teile eines bereits errichteten Aufzuges;
-   andere Anwendungen außerhalb des Anwendungsbereichs der EN 81 20:2014.

Règles de sécurité pour la construction et l'installation des élévateurs - Elévateur pour le transport de personnes et d'objets - Partie 21 : Ascenseurs et ascenseurs de charge neufs dans les bâtiments existants

La présente Norme européenne spécifie les règles de sécurité relatives aux ascenseurs et ascenseurs de charge neufs, installés à demeure dans des bâtiments existants où, dans certaines circonstances, certaines prescriptions de l'EN 81-20:2014 ne peuvent être satisfaites en raison de limites imposées par les contraintes de construction.
La présente Norme européenne donne la liste de quelques-unes de ces contraintes et fournit les prescriptions pour des solutions alternatives. Elle sera lue et appliquée conjointement avec la Norme européenne EN 81-20:2014.
La présente Norme européenne couvre :
-   soit la construction et l'installation d'un ou de plusieurs ascenseurs neufs complets, y compris la gaine et les emplacements de machinerie neufs, dans un bâtiment existant ;
-   soit le remplacement d'un ou plusieurs ascenseur(s) existant(s) par de nouveaux ascenseurs dans des gaines et emplacements de machinerie existants.
La présente Norme européenne ne couvre pas :
-   le remplacement ou les modifications de certaines pièces d'un ascenseur déjà installé ;
-   tout autre application en dehors du domaine d'application de l'EN 81-20:2014.

Varnostna pravila za konstruiranje in vgradnjo dvigal (liftov) - Dvigala za prevoz oseb in blaga - 21. del: Nova osebna in tovorno-osebna dvigala v obstoječih stavbah

Ta evropski standard določa varnostna pravila v zvezi z novimi osebnimi in tovorno-osebnimi dvigali, ki so trajno vgrajeni v obstoječe stavbe, kadar v nekaterih okoliščinah zaradi omejitev, ki jih narekujejo gradbene ovire, nekaterih zahtev standardov EN 81-20:2014 ni mogoče izpolniti (glejte tudi četrti stavek uvoda).
Ta evropski standard obravnava številne tovrstne omejitve in določa zahteve za alternativne rešitve. Standard se bere in uporablja v povezavi z evropskimi standardi EN 81-20:2014.
Ta evropski standard zajema:
– konstruiranje in vgradnjo enega ali več celotnih novih dvigal, vključno z novim jaškom in strojnico v obstoječi stavbi,
– ali zamenjavo enega ali več obstoječih dvigal z novimi dvigali v obstoječem jašku in strojnici.
Ta evropski standard ne obravnava:
– zamenjave ali sprememb nekaterih delov pri že vgrajenem dvigalu;
– drugih uporab zunaj področja uporabe standardov EN 81-20:2014.

General Information

• Status: Withdrawn
• Public Enquiry End Date: 02-Mar-2016
• Publication Date: 27-May-2018
• Withdrawal Date: 21-Aug-2022
• ICS: 91.140.90 - Lifts. Escalators
• Technical Committee: DTN - Lift and transport appliances
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 10-Aug-2022
• Due Date: 02-Sep-2022
• Completion Date: 22-Aug-2022
• Directive: 95/16/EC - European Parliament and Council Directive 95/16/EC of 29 June 1995 on the approximation of the laws of the Member States relating to lifts
• Ref Project: EN 81-21:2018 - Safety rules for the construction and installation of lifts - Lifts for the transport of persons and goods - Part 21: New passenger and goods passenger lifts in existing building

Relations

• Replaced By: SIST EN 81-21:2022 - Safety rules for the construction and installation of lifts - Lifts for the transport of persons and goods - Part 21: New passenger and goods passenger lifts in existing building
• Effective Date: 08-Jun-2022
• Replaces: SIST EN 81-21:2009+A1:2012 - Safety rules for the construction and installation of lifts - Lifts for the transport of persons and goods - Part 21: New passenger and goods passenger lifts in existing buildings
• Effective Date: 21-Mar-2018
• Replaces: SIST EN 81-21:2009+A1:2012 - Safety rules for the construction and installation of lifts - Lifts for the transport of persons and goods - Part 21: New passenger and goods passenger lifts in existing buildings
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 81-21:2018
01-julij-2018
1DGRPHãþD
SIST EN 81-21:2009+A1:2012
9DUQRVWQDSUDYLOD]DNRQVWUXLUDQMHLQYJUDGQMRGYLJDOOLIWRY'YLJDOD]DSUHYR]
RVHELQEODJDGHO1RYDRVHEQDLQWRYRUQRRVHEQDGYLJDODYREVWRMHþLK
VWDYEDK
Safety rules for the construction and installation of lifts - Lifts for the transport of persons
and goods - Part 21: New passenger and goods passenger lifts in existing building
Sicherheitsregeln für die Konstruktion und den Einbau von Aufzügen - Aufzüge für die
Personen- und Gütertransport - Teil 21: Neue Personen- und Lastenaufzüge in
bestehenden Gebäuden
Règles de sécurité pour la construction et l'installation des élévateurs - Elévateur pour le
transport de personnes et d'objets - Partie 21 : Ascenseurs et ascenseurs de charge
neufs dans les bâtiments existants
Ta slovenski standard je istoveten z: EN 81-21:2018
ICS:
91.140.90 'YLJDOD7HNRþHVWRSQLFH Lifts. Escalators
SIST EN 81-21:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 81-21:2018

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SIST EN 81-21:2018


EN 81-21
EUROPEAN STANDARD

NORME EUROPÉENNE

March 2018
EUROPÄISCHE NORM
ICS 91.140.90 Supersedes EN 81-21:2009+A1:2012
English Version

Safety rules for the construction and installation of lifts -
Lifts for the transport of persons and goods - Part 21: New
passenger and goods passenger lifts in existing building
Règles de sécurité pour la construction et l'installation Sicherheitsregeln für die Konstruktion und den Einbau
des élévateurs - Elévateur pour le transport de von Aufzügen - Aufzüge für den Personen- und
personnes et d'objets - Partie 21 : Ascenseurs et Gütertransport - Teil 21: Neue Personen- und
ascenseurs de charge neufs dans les bâtiments Lastenaufzüge in bestehenden Gebäuden
existants
This European Standard was approved by CEN on 11 May 2017.

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, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 81-21:2018 E
worldwide for CEN national Members.

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SIST EN 81-21:2018
EN 81-21:2018 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 List of significant hazards . 8
5 Safety requirements and/or protective measures . 9
5.1 General . 9
5.2 Perforate wall of the lift well. 9
5.3 Distance between car, counterweight or balancing weight . 9
5.4 Counterweight or balancing weight in a separate well . 9
5.4.1 General . 9
5.4.2 Counterweight or balancing weight well provisions. 9
5.4.3 Guiding of the counterweight or balancing weight . 10
5.5 Reduced clearances in the headroom . 10
5.5.1 General . 10
5.5.2 Devices providing refuge spaces in the headroom . 10
5.5.3 Safety system . 13
5.5.4 Visible and/or audible information . 14
5.5.5 Protection for group of lifts . 14
5.6 Car roof balustrade . 15
5.7 Reduced clearances in the pit . 15
5.7.1 General . 15
5.7.2 Devices providing refuge spaces in the pit . 15
5.7.3 Safety system . 18

5.7.4 Visible and/or audible information . 19
5.7.5 Partition in the pit . 19
5.7.6 Safe pit access . 19
5.8 Apron . 20
5.8.1 General . 20
5.8.2 Specific requirements . 20
5.9 Height of machine room . 21
5.10 Height of machine room doors . 21
5.11 Dimensions of trap doors for machine room and pulley room . 21
5.12 Height of landing doors . 21
5.13 Electrical safety devices . 22
6 Verification of safety requirements and/or protective measures . 22
6.1 Verification table . 22
6.2 Tests before putting the lift into service . 23
6.3 Technical compliance documentation. 24
7 Information for use . 24
7.1 Instructions . 24
7.2 Notices and warnings . 24
7.2.1 Dimensions . 24
7.2.2 Reduced top clearances . 25
2

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SIST EN 81-21:2018
EN 81-21:2018 (E)
7.2.3 Extendable balustrade . 25
7.2.4 Reduced bottom clearances . 25
7.2.5 Extendable car apron . 26
Annex A (normative) List of the electric safety devices . 27
Annex B (informative) Periodic examinations and tests, examinations and tests after an
important modification or after an accident . 28
B.1 Periodic examinations and tests . 28
B.2 Examinations and tests after an important modification or after an accident . 28
Annex C (normative) Examination of pre-triggered stopping system . 29
C.1 General provisions . 29
C.2 Statement and test samples . 29
C.3 Laboratory tests . 30
C.4 Calculation. 31
C.5 Test report . 33
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/33/EU aimed to be covered . 34

3

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SIST EN 81-21:2018
EN 81-21:2018 (E)
European foreword
This document (EN 81-21:2018) has been prepared by Technical Committee CEN/TC 10 “Lifts,
escalators and moving walks”, the secretariat of which is held by AFNOR.
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 September 2018 and conflicting national standards
shall be withdrawn at the latest by September 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 81-21:2009+A1:2012.
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.
The main changes with respect to the previous edition (EN 81-21:2009+A1:2012) are as follows:
— updating of references and their associated requirements with regard to EN 81-20:2014;
— removal of duplicated text in reference to the requirements for refuge spaces expressed in
EN 81-20:2014;
— replacement of Annex ZA with regard to the commission mandate M/549/C(2016) 5844 Final and
Directive 2014/33/EU.
This standard is part of the EN 81 series of standards “Safety rules for the construction and installation of
lifts”. This is the second edition.
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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
4

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SIST EN 81-21:2018
EN 81-21:2018 (E)
Introduction
This document is a type C standard as stated in EN ISO 12100.
When provisions of this type C standard are different from those stated in type A or B standards, the
provisions of this type C standard take precedence over the provisions of the other standards, for
machines that have been designed and built according to the provisions of this type C standard.
The machinery concerned and the extent to which hazards, hazardous situations and events are
covered are indicated in the scope of this document.
Where one or several requirements in EN 81-20:2014 cannot be fulfilled, due to reasons such as the
constraints of the structure of the existing building, the corresponding requirements in this European
Standard apply. According to section 2.2 of Annex I to the Lifts Directive, the application of alternative
measures to prevent the risk of crushing above and underneath the lift car is restricted to installations
where the requirement for free space or refuge is impossible to fulfil and may be subject to prior
approval by national authorities.
The main concern dealt with in this standard is the reduction of top and pit clearances that may be
required due to site conditions. The adopted principle of safety is based on two levels of achievement:
first by means of an electrical stopping of the lift car, then by means of a mechanical stopping of the lift
car.
When drafting this standard, it has been considered for reduced overhead and pit the following:
a) Risk reduction measures that rely solely on operations in compliance with procedures are
considered as not acceptable, except in a few situations in which mistake-proof solutions are not
available (e.g. some activities in repair and installation in which safety devices cannot be
operational);
b) The risk reduction measures are automatically (without any intervention) activated, or may be
manually activated if mistake-proof-by-design, or a combination of both is used.
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SIST EN 81-21:2018
EN 81-21:2018 (E)
1 Scope
This European Standard specifies the safety rules related to new passenger and goods/passenger lifts
permanently installed in existing buildings where in some circumstances due to limitations enforced by
building constraints, some requirements of EN 81-20:2014 cannot be met.
This European Standard addresses a number of these constraints and gives requirements for
alternative solutions. It will be read and applied in conjunction with the European Standard
EN 81-20:2014.
This European Standard covers:
— either the construction and installation of one or more complete new lift(s) including new well and
machinery spaces in an existing building; or
— the replacement of one or more existing lift(s) by new ones in existing well(s) and machinery
spaces.
This European Standard does not cover:
— replacement or modifications of some parts to a lift already installed;
— other applications outside of the scope of EN 81-20:2014.
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.
EN 81-20:2014 Safety rules for the construction and installation of lifts - Lifts for the transport of persons
and goods - Part 20: Passenger and goods passenger lifts
EN ISO 12100:2010, Safety of machinery - General principles for design - Risk assessment and risk
reduction (ISO 12100:2010)
EN ISO 13857:2008, Safety of machinery - Safety distances to prevent hazard zones being reached by
upper and lower limbs (ISO 13857:2008)
ISO 3864-1:2011, Graphical symbols - Safety colours and safety signs - Part 1: Design principles for safety
signs and safety markings
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 12100:2010,
EN 81-20:2014 and the following apply.
3.1
existing building
building, which is used or was already used before the order for the lift was placed
Note 1 to entry: A building whose internal structure is completely renewed is considered as a new building.
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EN 81-21:2018 (E)
3.2
movable stop
mechanical device that under normal operation allows the free movement of the lift between normal
terminal stops
Note 1 to entry: Where a person enters on the car roof or in the pit, the device limits the travel of the car to
ensure sufficient refuge space in the headroom or in the pit.
3.3
triggering device
device for operating a stopping gear by a mechanical linkage when the lift car passes a predetermined
position in the well
Note 1 to entry: This device is activated when an access to the lift well is opened by means of a key.
3.4
stopping gear
mechanical device for stopping, and maintaining stationary the lift car in the case of movement of the
lift car above and/or below a predetermined position in the well to protect person(s) on the car roof
and/or in the pit
3.5
pre-triggered stopping system
system including the triggering device, the stopping gear and a mechanical linkage in between
Note 1 to entry: Under normal operation of the lift, the system allows the free movement of the lift between
normal terminal stops. Where a person enters on the car roof or in the pit the system ensures refuge spaces in the
headroom or in the pit.
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EN 81-21:2018 (E)
4 List of significant hazards
This clause contains a list of all the significant hazards, hazardous situations and events, as far as they
are dealt with in this standard, identified by risk assessment as significant for this type of machinery
and which require action to eliminate or reduce the risk (see Table 1).
Table 1 — List of significant hazards
Hazards Relevant clauses in this
No
as listed in Annex B of EN ISO 12100:2010 standard
1 Mechanical hazards due to:

- Machine parts or work pieces, e.g.:
- Accumulation of energy inside the machinery, e.g.:
Crushing hazard 5.5, 5.7
Shearing hazard 5.2 a), 5.4.2
Drawing-in or trapping hazard 5.5.3, 5.7.3
Impact hazard 5.3, 5.4.3, 5.9, 5.10, 5.11, 5.12.
Slip, trip and fall of persons (related to machinery) 5.2 b), 5.4.2, 5.8
- Uncontrolled amplitude of movements 5.4.1, 5.4.3
- From insufficient mechanical strength of parts 5.5.2.3.2 d), 5.6.1.2 a),
5.7.2.3.2 d), 5.8.1
- Falling of person from person carrier 5.6, 5.8.1
8 Hazards generated by neglecting ergonomic principles
in machinery design as, e.g. hazards from:

Access 5.4.2 d), 5.9, 5.10, 5.11, 5.12
Inadequate local lighting 5.4.2 h), 5.4.2 i)
Unhealthy postures 5.5.1
Human error, human behaviour 5.5.4, 5.7.4, 7.2
From abnormal conditions of assembly / testing / use / 5.4, 5.5, 5.6, 5.7, 5.8
maintenance
9 Hazards associated with the environment in which the
machine is used

Failure of the power supply 5.5.2.5.1.1, 5.5.3.1, 5.5.3.2,
5.7.2.5.1.1, 5.7.3.1, 5.7.3.2
Failure of the control circuit 5.5, 5.7
Unexpected start-up, unexpected overrun / overspeed (or
any similar malfunction) from;
- Restoration of energy supply after an interruption 5.5.4, 5.7.4
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EN 81-21:2018 (E)
5 Safety requirements and/or protective measures
5.1 General
Lifts within the scope of this standard shall comply with the relevant safety requirements and/or
protective measures of the following clauses where one or several requirements in EN 81-20:2014
cannot be fulfilled. In addition, the lift shall be designed according to the principles of
EN ISO 12100:2010 for relevant but not significant hazards, which are not dealt with by this standard.
5.2 Perforate wall of the lift well
The requirements for the well enclosure of EN 81-20:2014, 5.2.5.2 are complemented by the following:
Any existing well enclosure may be perforate provided that
a) EN ISO 13857:2008, 4.2.4.2 is fulfilled; and
b) a protective imperforate screen shall be provided around the landing door locking devices in order
to prevent any manipulation of the locking devices by means of a rigid rod 0,30 m long.
NOTE National regulations for the preservation of historical buildings may require the retention of an
existing perforate enclosure.
5.3 Distance between car, counterweight or balancing weight
The requirements of EN 81-20:2014, 5.2.5.5.1 h) for this distance may be replaced by the following:
The car and its associated components shall be at a distance of at least 25 mm from the counterweight
or balancing weight (if there is one) and its associated components.
To avoid any impact between the car (and its associated components) and the counterweight or
balancing weight (and its associated components), in case of failure of normal guidance, emergency
guidance on the car and counterweight shall be provided to maintain the car and the counterweight in
their horizontal position.
5.4 Counterweight or balancing weight in a separate well
5.4.1 General
The counterweight or the balancing weight may be installed in a separate well from the car, provided
that the configuration on site does not permit the installation of a lift having an available car area
sufficient to fulfil the transport needs.
NOTE The standard covers only the installation of one counterweight (or balancing weight) in its own well.
The following requirements shall be met.
5.4.2 Counterweight or balancing weight well provisions
The requirements of EN 81-20:2014, 5.2.5.1.2 are complemented as follows:
In case of a separate well for the counterweight/balancing weight the following requirements apply:
a) all requirements related to the totally enclosed well (EN 81-20:2014, 5.2.1.8 and 5.2.5.2) shall be
fulfilled for the well of the counterweight/balancing weight;
b) inspection doors shall be provided at both ends of the separate well and where necessary between
them to allow safe maintenance and examinations of the well equipment; they shall comply with
EN 81-20:2014, 5.2.3;
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EN 81-21:2018 (E)
c) the distance between inspection doors and equipment requiring maintenance or inspection shall
not exceed 0,7 m;
d) where a safety gear is installed at the counterweight/balancing weight, inspection doors shall-
provide access to be able to inspect and maintain the full travel of the counterweight/balancing
weight;
e) stopping device(s) accessible on opening the inspection doors at both ends of the separate well
shall be provided, in conformity with the requirements of EN 81-20:2014, 5.12.1.11;
f) electric socket outlets accessible on opening the inspection doors at both ends of the well shall be
provided as defined in EN 81-20:2014, 5.10.7.2;
g) the separate well shall be exclusively used for the lift in compliance with EN 81-20:2014, 5.2.1.2;
h) the separate well shall be provided with permanently installed electric lighting, giving an intensity
of at least 50 lux on the equipment requiring maintenance/inspection;
i) means to switch the separate well lighting shall be provided on opening the inspection door at the
lower end of the well.
5.4.3 Guiding of the counterweight or balancing weight
The requirements of EN 81-20:2014, 5.7.1 are supplemented as follows:
When travelling in a separate well, the counterweight or the balancing weight may be guided by ropes
or by the shape of the counterweight or the balancing weight and its well enclosure.
If the counterweight or balancing weight is resting on its buffers it shall be kept in a substantially
upright position by the use of a small distance to the well enclosure or an emergency guiding.
Provisions shall be made so as to avoid the counterweight or the balancing weight to rotate, e.g. by
using equal number of left and right twisted suspension ropes.
Where its shape guides the counterweight or balancing weight, the enclosure of the well shall be
continuous and flush without any protrusion from which the counterweight or the balancing weight can
be blocked. The well enclosure shall be covered by durable material.
In case of ropes as guiding elements a minimum number of 4 ropes shall be used. Springs or weights
shall tighten the ropes. The horizontal free distance between the counterweight or the balancing weight
and the well enclosure shall be at least 50 mm if the enclosure of the well is continuous and flush
otherwise it shall be increased by 2 mm for each meter of distance between the fixations of the ropes.
5.5 Reduced clearances in the headroom
5.5.1 General
The requirements of EN 81-20:2014, 5.2.5.7 may be replaced by the following:
5.5.2 Devices providing refuge spaces in the headroom
5.5.2.1 General
The devices shall be:
a) either movable stops; or
b) a pre-triggered stopping system.
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EN 81-21:2018 (E)
5.5.2.2 Movable stops
5.5.2.2.1 General
Automatically operated movable stops shall be designed to prevent damage due to any collision when
they are moved between the fully retracted and extended position.
5.5.2.2.2 Arrangement
5.5.2.2.2.1 In the case of traction drive lifts, the movable stops shall be installed in such a way as to
act on a downwards travelling counterweight to mechanically stop the car.
5.5.2.2.2.2 In the case of positive drive lifts, the movable stops shall be installed in such a way as to
act on an upwards travelling car to mechanically stop the car.
5.5.2.2.2.3 In the case of hydraulic lifts, the movable stops shall consist of one or more devices
external to the jack situated outside of the car projection, the resultant force of which is exerted on the
centre line of the jack.
5.5.2.2.3 Buffering of movable stops
5.5.2.2.3.1 In the case of traction and positive drive lifts the movable stops shall incorporate buffers
or act on buffers complying with EN 81-20:2014, 5.8.1 and 5.8.2.
5.5.2.2.3.2 In the case of hydraulic lifts the design of the movable stops shall be such that the
average retardation of the car does not exceed 1 g and that in case of an indirect acting lift the
n
retardation does not result in slack rope or chain.
5.5.2.3 Pre-triggered stopping system
5.5.2.3.1 General
The pre-triggered stopping system shall include a triggering device with its actuation means for
tripping a mechanical stopping gear by a linkage when the car reaches a fixed tripping point i
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