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 document specifies the safety rules related to passenger and goods/passenger lifts installed in existing buildings where limitations enforced by certain building constraints mean that some requirements of EN 81 20:2020 cannot be met.
This document is intended to be read and applied in conjunction with EN 81-20:2020. It addresses the following constraints and gives requirements for alternative solutions:
-   existing perforate walls of the lift well;
-   reduction in available well are leading to reduced distance between car, counterweight or balancing weight;
-   counterweight or balancing weight in a separate existing well;
-   reduced building dimensions and clearances leading to:
-   reductions in available space for headroom and pit;
-   reduced car roof balustrade dimensions;
-   reduced height of sill apron;
-   reduced height of machine and/or pulley room;
-   reduced available area for access door/trap door;
-   reduction in available height of landing doors.
This document is not applicable to lifts installed before the date of its publication.

Sicherheitsregeln für die Konstruktion und den Einbau von Aufzügen - Aufzüge für den 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 20:2020 nicht erfüllt werden können.
Dieses Dokument soll verstanden und angewendet werden in Verbindung mit EN 81-20:2020. Es geht auf folgende Zwänge ein und gibt Anforderungen für alternative Lösungen an:
-   Bestehende durchbrochene Schachtwände;
-   die Verringerung des verfügbaren Schachts führt zu einem geringeren Abstand zwischen Fahrkorb, Gegengewicht oder Ausgleichsgewicht;
-   Gegengewicht oder Ausgleichsgewicht in einem separaten vorhandenen Schacht;
-   reduzierte Gebäudemaße und Abstände führen zu:
-   Reduzierung des vorhandenen Schutzraums für Schachtkopf und Schachtgrube;
-   Reduzierung der Fahrkorbdachumwehrung;
-   Reduzierung der Höhe der Fahrkorbschürze;
-   Reduzierung der Höhe des Triebwerksraums und/oder Rollenräume;
-   Reduzierung der Höhe der Schachttüren.
Dieses Dokument ist nicht anwendbar auf Aufzüge, die vor der Veröffentlichung dieser Norm installiert wurden.

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

Le présent document spécifie les règles de sécurité relatives aux ascenseurs et ascenseurs de charge, installés dans des bâtiments existants où certaines prescriptions de l'EN 81-20:2020 ne peuvent être satisfaites en raison de limites imposées par les contraintes de construction.
Le présent document est destiné à être lu et appliqué de pair avec l'EN 81-20:2020. Il aborde les contraintes suivantes et donne des exigences pour des solutions alternatives :
-   parois de gaine non pleine existantes ;
-   réduction de la gaine disponible, entraînant une réduction de la distance entre la cabine, le contrepoids ou la masse d'équilibrage ;
-   contrepoids ou masse d'équilibrage dans une gaine séparée existante ;
-   réduction des dimensions de construction et des réserves conduisant à :
-   réduction de l'espace disponible pour la partie supérieure de la gaine et cuvette ;
-   réduction des dimensions de la balustrade de toit de cabine ;
-   réduction de la hauteur du garde-pieds du seuil ;
-   réduction de la hauteur du local de machines/de poulies ;
-   réduction de l'espace disponible pour la porte/trappe d'accès ;
-   réduction de la hauteur disponible des portes palières.
Le présent document n'est pas applicable aux ascenseurs qui ont été fabriqués avant sa date de publication.

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

General Information

Status
Not Published
Public Enquiry End Date
20-Dec-2020
Current Stage
4020 - Public enquire (PE) (Adopted Project)
Start Date
12-Oct-2020
Due Date
01-Mar-2021
Completion Date
05-Jan-2021

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SLOVENSKI STANDARD
oSIST prEN 81-21:2020
01-december-2020

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

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 den

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: prEN 81-21
ICS:
91.140.90 Dvigala. Tekoče stopnice Lifts. Escalators
oSIST prEN 81-21:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 81-21:2020
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oSIST prEN 81-21:2020
DRAFT
EUROPEAN STANDARD
prEN 81-21
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2020
ICS 91.140.90 Will supersede EN 81-21:2018
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 draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 10.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 81-21:2020 E

worldwide for CEN national Members.
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oSIST prEN 81-21:2020
prEN 81-21:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 5

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 6

3 Terms and definitions ................................................................................................................................... 7

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 .............................................................................................. 24

7 Information for use ..................................................................................................................................... 24

7.1 Instructions .................................................................................................................................................... 24

7.2 Notices and warnings .................................................................................................................................. 25

7.2.1 Dimensions ..................................................................................................................................................... 25

7.2.2 Reduced top clearances ............................................................................................................................. 25

7.2.3 Extendable balustrade ............................................................................................................................... 25

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oSIST prEN 81-21:2020
prEN 81-21:2020 (E)

7.2.4 Reduced bottom clearances ...................................................................................................................... 26

7.2.5 Extendable car apron .................................................................................................................................. 26

Annex A (normative) List of the electric safety devices ............................................................................... 27

Annex B (normative) Examination of pre-triggered stopping system ................................................... 28

B.1 General provisions ....................................................................................................................................... 28

B.2 Statement and test samples ...................................................................................................................... 28

B.3 Laboratory tests ............................................................................................................................................ 29

B.4 Calculation....................................................................................................................................................... 30

B.5 Test report ...................................................................................................................................................... 32

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Directive 2014/33/EU aimed to be covered ..................................................... 33

Bibliography ................................................................................................................................................................. 35

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oSIST prEN 81-21:2020
prEN 81-21:2020 (E)
European foreword

This document (prEN 81-21:2020) has been prepared by Technical Committee CEN/TC 10 “Lifts,

escalators and moving walks”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.

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.
This document will supersede EN 81-21:2018.

In comparison with the previous edition, the following significant changes have been made:

— all referenced standards have now been dated ;

— a new Annex ZA has been developed in order to be aligned with the requirements of the EU

Commission Standardization Request “M/549 C(2016) 5884 final”.
No technical changes have been made during this revision.

The content of this document provides the enhanced design rules, examinations and tests for lifts

installed into existing buildings.

This standard is part of the EN 81 series of standards. The structure of the EN 81 series is described in

CEN/TR 81-10:2008.
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oSIST prEN 81-21:2020
prEN 81-21:2020 (E)
Introduction
This document is a type C standard as stated in EN ISO 12100:2010.

The lifts concerned and the extent to which hazards, hazardous situations or hazardous events are

covered are indicated in the Scope of this document.

When requirements of this type-C standard are different from those stated in type-A or type-B standards,

the requirements of this type-C standard take precedence over the requirements of the other standards,

for machines that have been designed and built according to the provisions of this type C standard.

The main concern dealt with in this document 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 document, 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.

b) The risk reduction measures are automatically (without any intervention) activated, or manually

activated if their use is mistake-proof such that a person cannot come to harm during and after their

deployment, or a combination of both is used.

Within each member state in Europe there may be a definition of what might be considered an existing

building. In order to have a uniform understanding of the requirements of this document, an existing

building within the terms of this document is understood to be one which was already in use before the

lift was installed. A building whose internal structure is completely renewed is considered as a new

building within the terms of this document.
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oSIST prEN 81-21:2020
prEN 81-21:2020 (E)
1 Scope

This document specifies the safety rules related to passenger and goods/passenger lifts installed in

existing buildings where limitations enforced by certain building constraints mean that some

requirements of EN 81-20:2020 cannot be met.

This document is intended to be read and applied in conjunction with EN 81-20:2020. It addresses the

following constraints and gives requirements for alternative solutions:
— existing perforate walls of the lift well;

— reduction in available well are leading to reduced distance between car, counterweight or balancing

weight;
— counterweight or balancing weight in a separate existing well;
— reduced building dimensions and clearances leading to:
— reductions in available space for headroom and pit;
— reduced car roof balustrade dimensions;
— reduced height of sill apron;
— reduced height of machine and/or pulley room;
— reduced available area for access door/trap door;
— reduction in available height of landing doors.

This document is not applicable to lifts installed before the date of its publication.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 81-20:2020, 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 13857:2019, Safety of machinery - Safety distances to prevent hazard zones being reached by upper

and lower limbs (ISO 13857:2019)

ISO 3864-1:2011, Graphical symbols - Safety colours and safety signs - Part 1: Design principles for safety

signs and safety markings
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oSIST prEN 81-21:2020
prEN 81-21:2020 (E)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN ISO 12100:2010, EN 81-20:2020

and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
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.
3.2
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.

3.3
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
3.4
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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oSIST prEN 81-21:2020
prEN 81-21:2020 (E)
4 List of significant hazards

This clause contains all the significant hazards, hazardous situations and events, as far as they are dealt

with in this document, 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 document
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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oSIST prEN 81-21:2020
prEN 81-21:2020 (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 81-20:2020

cannot be fulfilled. In addition, lifts 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 document.

5.2 Perforate wall of the lift well

Where due to the lift well of the existing lift being perforate clause EN 81-20:2020, 5.2.5.2 shall be

replaced with the following:
Any existing well enclosure shall be perforate provided that:
a) EN ISO 13857:2019, 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.

5.3 Distance between car, counterweight or balancing weight

Where due to existing building constraints the distance between car and counterweight/balancing

weight according to EN 81-20:2020, 5.2.5.5.1 h) cannot be achieved the following shall apply.

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

Where the counterweight or balancing weight has previously been accommodated in a separate existing

well, and the configuration on site does not permit the installation of a lift having an available car area

sufficient to fulfil the transport needs if the counterweight or balancing weight is repositioned to be in

the same well as the car, the requirements of EN 81-20:2020, 5.2.5.1.2 are added to as follows:

NOTE The standard covers only the installation of one counterweight (or balancing weight) in its own well.

5.4.2 Counterweight or balancing weight well provisions

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 81-20:2020, 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 81-20:2020, 5.2.3;

c) the distance between inspection doors and equipment requiring maintenance or inspection shall not

exceed 0,7 m;
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oSIST prEN 81-21:2020
prEN 81-21:2020 (E)

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 81-20:2020, 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 81-20:2020, 5.10.7.2;

g) the separate well shall be exclusively used for the lift in compliance with EN 81-20:2020, 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

Where a counterweight or balancing weight is installed into its own well in accordance with 5.4.2, the

requirements of EN 81-20:2020, 5.7.1 are added to as follows:

When travelling in a separate well, the counterweight or the balancing weight shall 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

Where due to existing building constraints the dimensional requirements of EN 81-20:2020, 5.2.5.7 for

headroom cannot be met, it shall 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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oSIST prEN 81-21:2020
prEN 81-21:2020 (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 81-20:2020, 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 in the up direction.

5.5.2.3.2 The triggering device shall be easily accessible so that examinations and maintenance

operations can be carried out in complete safety from the pit, or from the car roof or from outside of the

well.
5.5.2.3.3 The pre-triggered stopping system shall comply with the following:

a) the stopping gear shall be fixed on the car and act on the guide rails of the car;

b) the stopping gear shall be tripped by a mechanical triggering device using a mechanical linkage for

the tripping operation;

c) the stopping gear shall be kept tripped by the triggering device and the linkage when the car is at any

position above the tripping point;

in case of a release of the stopping gear due to dynamic effects or rescue operations it shall be re-

engaged when the car moves again
...

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