SIST EN 81-21:2009+A1:2012
(Main)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
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
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 81-1 and EN 81-2 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 81-1 or EN 81-2 !deleted text", including their Clause 0. 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 81-1 or EN 81-2.
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 durch bauliche Einschränkungen einige Anforderungen von EN 81 1 und EN 81-2 nicht erfüllt werden können (siehe Einleitung, 4. Satz).
Diese Europäische Norm befasst sich mit einer Anzahl dieser Einschränkungen und nennt Anforderungen für alternative Lösungen. Sie muss in Verbindung mit den Normen EN 81 1 oder EN 81 2 !gelöschter Text", einschließlich ihres Abschnittes 0, 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 neuen Aufstellungsorten 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 1 oder EN 81 2.
Règles de sécurité pour la construction et l'installation des élévateurs - Élévateurs pour le transport de personnes et de charges - Partie 21 : Ascenseurs et ascenseurs de charge neufs dans les bâtiments existants
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 (vključno z dopolnilom A1)
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 81-1 in EN 81-2 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 evropskima standardoma EN 81-1 ali EN 81-2, vključno z njunima točkama 0. 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 s strojnico. Ta evropski standard ne zajema: – zamenjave ali sprememb nekaterih delov pri že vgrajenem dvigalu, –drugih uporab zunaj področja uporabe standardov EN 81-1 ali EN 81-2.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 81-21:2009+A1:2012
01-oktober-2012
1DGRPHãþD
SIST EN 81-21:2009
9DUQRVWQDSUDYLOD]DNRQVWUXLUDQMHLQYJUDGQMRGYLJDO OLIWRY 'YLJDOD]DSUHYR]
RVHELQEODJDGHO 1RYDRVHEQDLQWRYRUQRRVHEQDGYLJDODYREVWRMHþLK
VWDYEDK YNOMXþQR]GRSROQLORP$
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
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 - Élévateurs pour
le transport de personnes et de charges - Partie 21 : Ascenseurs et ascenseurs de
charge neufs dans les bâtiments existants
Ta slovenski standard je istoveten z: EN 81-21:2009+A1:2012
ICS:
91.140.90 'YLJDOD7HNRþHVWRSQLFH Lifts. Escalators
SIST EN 81-21:2009+A1:2012 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 81-21:2009+A1:2012
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SIST EN 81-21:2009+A1:2012
EUROPEAN STANDARD
EN 81-21:2009+A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2012
ICS 91.140.90 Supersedes EN 81-21:2009
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 buildings
Règles de sécurité pour la construction et l'installation des Sicherheitsregeln für die Konstruktion und den Einbau von
élévateurs - Élévateurs pour le transport de personnes et Aufzügen - Aufzüge für den Personen- und Gütertransport -
de charges - Partie 21 : Ascenseurs et ascenseurs de Teil 21: Neue Personen- und Lastenaufzüge in
charge neufs dans les bâtiments existants bestehenden Gebäuden
This European Standard was approved by CEN on 16 July 2009 and includes Amendment 1 approved by CEN on 16 July 2012.
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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 81-21:2009+A1:2012: E
worldwide for CEN national Members.
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SIST EN 81-21:2009+A1:2012
EN 81-21:2009+A1:2012 (E)
Contents Page
Foreword .3
Introduction .4
1 Scope .5
2 Normative references .5
3 Terms and definitions .5
4 List of significant hazards .7
5 Safety requirements and/or protective measures .8
5.1 Perforate wall of the lift well .8
5.2 Clearances between car, counterweight or balancing weight .8
5.3 Counterweight or balancing weight in a separate well .8
5.4 Pulleys in the well .9
5.5 Reduced top clearances . 10
5.6 Car roof balustrade . 14
5.7 Reduced bottom clearances . 15
5.8 Apron . 19
5.9 Height of machine room . 21
5.10 Height of machine room doors . 21
5.11 Dimensions of trap doors for machine room . 21
5.12 Height of pulley rooms . 22
5.13 Dimensions of trap doors for pulley room . 22
5.14 Height of landing doors . 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
6.3 Technical dossier. 24
7 Information for use . 24
7.1 Instructions . 24
7.2 Notices and warnings . 25
Annex A (normative) List of the electric safety devices . 27
Annex B (informative) Periodical examinations and tests, examinations and tests after an
important modification or after an accident . 28
B.1 Periodical 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.3.1 Method of test . 30
C.3.2 Determination of the nominal braking force of the stopping gear . 30
C.3.3 Checking after the tests . 30
C.4 Calculation . 31
C.4.1 Calculation method. 31
C.4.2 Site test case . 31
C.4.3 Worst cases . 31
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 95/16/EC . 33
Bibliography . 34
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SIST EN 81-21:2009+A1:2012
EN 81-21:2009+A1:2012 (E)
Foreword
This document (EN 81-21:2009+A1:2012) 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 February 2013, and conflicting national standards shall be withdrawn
at the latest by February 2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 81-21:2009.
This document includes Amendment 1 approved by CEN on 2012-07-16.
The start and finish of text introduced or altered by amendment is indicated in the text by tags !".
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 standard is part of the EN 81 series of standards “Safety rules for the construction and installation of lifts”.
This is the first 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
3
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SIST EN 81-21:2009+A1:2012
EN 81-21:2009+A1:2012 (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 81-1 or EN 81-2 !deleted text" 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 shall be automatically (without any intervention) activated, or may be
manually activated if mistake-proof-by-design, or a combination of both is used.
4
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SIST EN 81-21:2009+A1:2012
EN 81-21:2009+A1:2012 (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
th
building constraints, some requirements of EN 81-1 and EN 81-2 cannot be met (see also 4 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 81-1 or EN 81-2
!deleted text", including their Clause 0.
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 81-1 or EN 81-2.
2 Normative references
The following referenced documents are indispensable for the application 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 81-1, Safety rules for the construction and installation of lifts — Part 1: Electric lifts
EN 81-2, Safety rules for the construction and installation of lifts — Part 2: Hydraulic lifts"
EN ISO 12100-1:2003, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic
terminology, methodology (ISO 12100-1:2003)
EN ISO 12100-2:2003, Safety of machinery — Basic concepts, general principles for design —
Part 2:Technical principles (ISO 12100-2:2003)
ISO 3864-1:2002, Graphical symbols — Safety colours and safety signs — Part 1: Design principles for safety
signs in workplaces and public areas
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 12100-1:2003 and
EN 81-1:1998 and EN 81-2:1998 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 A building whose internal structure is completely renewed is considered as a new building.
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SIST EN 81-21:2009+A1:2012
EN 81-21:2009+A1:2012 (E)
3.2
movable stop
mechanical device that under normal operation allows the free movement of the lift between normal terminal
stops
NOTE Where a person enters on the car roof or in the pit, the device limits the travel of the car to ensure sufficient
safety 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 This device is actuated when a door/trap door giving access to the lift well is open by means of a key.
3.4
stopping gear
mechanical device for stopping, and maintaining stationary the lift car in the case of unintended 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 mechanical stopping gear and a mechanical linkage in between
NOTE 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 sufficient safety space in the headroom or in the pit
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SIST EN 81-21:2009+A1:2012
EN 81-21:2009+A1:2012 (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 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
No Relevant clauses
as listed in Annex A of EN ISO 14121-1
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 5.1 a), 5.3.1
Entanglement hazard 5.4 a)
Drawing-in or trapping hazard 5.5.3, 5.7.3
Impact hazard 5.2, 5.3.2, 5.4 b), 5.9, 5.10, 5.11,
5.12, 5.13, 5.14
Slip, trip and fall of persons (related to machinery) 5.1 b), 5.3.1, 5.8
- Uncontrolled amplitude of movements 5.2, 5.3.2
- From insufficient mechanical strength of parts 5.4 b), 5.5.2.2.2 d), 5.6.2 a),
5.7.2.2.3 d), 5.8.1 c)
- From inadequate design of pulleys, drums 5.4 b)
- Falling of person from person carrier
5.4 c), 5.6, 5.8 a) 2), 5.8 b) 2)
8 Hazards generated by neglecting ergonomic principles in
machinery design as, e.g. hazards from:
Access 5.3.1 d), 5.4 c), 5.9, 5.10, 5.11, 5.12,
5.13, 5.14
Inadequate local lighting 5.3.1 h), 5.3.1 i)
Unhealthy postures 5.5
Human error, human behaviour 5.5.4, 5.7.4, 7.2
From abnormal conditions of assembly / testing / use / maintenance 5.3, 5.5, 5.6, 5.7, 5.8
9 Hazards associated with the environment in which the machine is
used
Failure of the power supply 5.5.2.4.1, 5.5.3.1, 5.5.3.2.2,
5.7.2.4.1, 5.7.3.1, 5.7.3.2.2
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 81-21:2009+A1:2012
EN 81-21:2009+A1:2012 (E)
5 Safety requirements and/or protective measures
Lifts within the scope of this standard shall comply with the relevant safety requirements and/or protective
measures of this clause where one or several requirements in !EN 81-1 or EN 81-2", cannot be fulfilled.
In addition, the lift shall be designed according to the principles of EN ISO 12100 for relevant but not
significant hazards, which are not dealt with by this standard.
5.1 Perforate wall of the lift well
The requirements of !EN 81-1" and EN 81-2, 5.2.1 are completed by the following:
Any existing well enclosure may be perforate provided that:
a) EN ISO 13857, clause 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 1 National regulations for the preservation of historical buildings may require the retention of an existing
perforate enclosure.
NOTE 2 For lifts, which might be subject to vandalism, see EN 81-71, 5.1.1.
5.2 Clearances between car, counterweight or balancing weight
The requirements of !EN 81-1" and EN 81-2, 11.3 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.
5.3 Counterweight or balancing weight in a separate well
The counterweight or the balancing weight may be installed in a separate well than 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 shall be met.
5.3.1 Counterweight or balancing weight well provisions
The requirements of !EN 81-1", and EN 81-2, 5.1.2 are supplemented as follows:
In case of a separate well for the counterweight/balancing weight the following applies:
a) All requirements related to the totally enclosed well (!EN 81-1" and EN 81-2, 5.2 and 5.3) shall be
fulfilled for the well of the counterweight/balancing weight;
b) Inspection traps shall be provided at both ends of the separate well and between them where they are
necessary to allow safe maintenance and examinations of the well equipment; they shall comply with
!EN 81-1 and EN 81-2, 5.2.2;"
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EN 81-21:2009+A1:2012 (E)
c) The distance between inspection traps 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 traps shall be provided
for the full length of the travel path;
e) Stopping device(s) accessible on opening the inspection traps at both ends of the separate well shall be
provided, in conformity with the requirements of !EN 81-1" and EN 81-2, 14.2.2 and 15.7;
f) Electric socket outlet as defined in !EN 81-1" and EN 81-2, 13.6.2 shall be provided at the opening
of the inspection trap on both ends of the separate well, inside the well;
g) The separate well shall be exclusively used for the lift in compliance with !EN 81-1" and EN 81-2,
5.8;
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 trap on the lower
end of the well.
5.3.2 Guiding of the counterweight or balancing weight
The requirements of !EN 81-1" and EN 81-2, 10.2 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.
5.4 Pulleys in the well
The requirements of !EN 81-1 and EN 81-2, 6.7.2" may be replaced by the following:
Diverter pulleys may be installed in the headroom of the well within the projection of the car roof provided that:
a) The diverter pulleys shall be protected according to !EN 81-1", 9.7 or EN 81-2, 9.4;
b) Retaining devices shall prevent diverter pulleys from falling in the event of a mechanical failure of the
pulley, shaft or bearings. The devices shall be able to support the weight of the pulley and the suspended
loads;
c) Examinations and tests and maintenance operations can be carried out in complete safety from the car
roof, from inside the car, from a platform or from outside of the well;
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SIST EN 81-21:2009+A1:2012
EN 81-21:2009+A1:2012 (E)
d) Clearances in the headroom shall comply with !EN 81-1" or EN 81-2, 5.7 or the requirements of 5.5.
5.5 Reduced top clearances
!EN 81-1", Annex K does not apply.
The requirements of !EN 81-1", 5.7.1.1 b), c) and d), !EN 81-1", 5.7.2.2 and EN 81-2, 5.7.1.1 b), c)
and d) may be replaced by the following:
5.5.1 General
The lift shall be equipped with devices providing safety spaces in the headroom (5.5.2) and a safety system
(5.5.3) controlling the operation of the lift.
5.5.2 Devices providing safety spaces in the headroom
The devices providing safety spaces in the headroom shall be:
a) Either movable stops; or
b) A pre-triggered stopping system.
5.5.2.1 Movable stops
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.
5.5.2.1.1 Arrangement
5.5.2.1.1.1 In the case of traction drive lifts the movable stops shall be installed under the counterweight
to mechanically stop the car.
5.5.2.1.1.2 In the case of positive drive lifts the movable stops shall be installed above the car to
mechanically stop the car.
5.5.2.1.1.3 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.
5.5.2.1.2 Buffering of movable stops
5.5.2.1.2.1 In the case of traction and positive drive lifts the movable stops shall be fitted with buffers
complying with !EN 81-1", 10.3 and 10.4.
5.5.2.1.2.2 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
n
result in slack rope or chain.
5.5.2.2 Pre-triggered stopping system
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.
5.5.2.2.1 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.
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EN 81-21:2009+A1:2012 (E)
5.5.2.2.2 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 in up direction above the tripping point keeping the required safety
space;
d) The stopping gear shall be operated positively:
1) Where springs are used they shall act by compression;
2) Where a rope is used the safety factor of the rope shall be in accordance with !EN 81-1",
9.9.6.2 and EN 81-2, 9.10.6.2;
e) The force required to activate the stopping ge
...
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