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
Published
Public Enquiry End Date
02-Mar-2016
Publication Date
27-May-2018
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
10-Aug-2022
Due Date
02-Sep-2022

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Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 81-21:2018
01-julij-2018
1DGRPHãþD
SIST EN 81-21:2009+A1:2012

9DUQRVWQDSUDYLOD]DNRQVWUXLUDQMHLQYJUDGQMRGYLJDO OLIWRY '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.

---------------------- Page: 1 ----------------------
SIST EN 81-21:2018
---------------------- Page: 2 ----------------------
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.
---------------------- Page: 3 ----------------------
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

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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

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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.
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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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SIST EN 81-21:2018
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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SIST EN 81-21:2018
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
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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SIST EN 81-21:2018
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;
---------------------- Page: 11 ----------------------
SIST EN 81-21:2018
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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SIST EN 81-21:2018
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

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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