SIST EN 474-12:2007+A1:2008
(Main)Earth-moving machinery - Safety - Part 12: Requirements for cable excavators
Earth-moving machinery - Safety - Part 12: Requirements for cable excavators
This part of EN 474 deals with all significant hazards, hazardous situations and events relevant to cable excavators as defined in EN ISO 6165:2006, when they are used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer (see Clause 4).
This European Standard applies also to cable excavators, their undercarriage and upper-structure, if intended for use in combination with other equipment or attachment, such as drill rigs, pile driving and extracting equipment and moving equipment (e.g. rail track, walking legs, pontoon, ship) or stationary undercarriage. This European Standard is not dealing with the specific hazards due to these additional equipment or attachment.
NOTE For these additional equipment or attachment, relevant specific European Standards should be considered where available, for example:
- for pile driving and extracting equipment: EN 996:1995;
- for drill rigs: EN 791:1995.
The requirements of this part are complementarily to the common requirements formulated in EN 474-1:2006.
This part does not repeat the requirements from EN 474-1:2006, but adds or replaces the requirements for application for cable excavators.
This part specifies the appropriate technical measures to eliminate or reduce risks arising from the significant hazards, hazardous situations and events during commissioning, operation and maintenance of the machinery in the scope.
This European Standard is not applicable to cable excavators manufactured before the date of publication of this European Standard by CEN.
Erdbaumaschinen - Sicherheit - Teil 12: Anforderungen für Seilbagger
Dieser Teil der EN 474 behandelt alle signifikanten Gefährdungen, Gefährdungssituationen und Gefährdungs-ereignisse, die auf Seilbagger entsprechend EN ISO 6165:2006 zutreffen, wenn sie bestimmungsgemäß verwendet werden. Die nach vernünftigem Ermessen für den Hersteller vorhersehbare Nutzung der Maschine außerhalb der bestimmungsgemäßen Verwendung ist ebenfalls berücksichtigt (siehe Abschnitt 4).
Diese Europäische Norm gilt auch für Seilbagger und ihre Unter- und Oberwagen, wenn diese in Verbindung mit anderen Arbeitsausrüstungen und Einrichtungen wie Bohr-, Ramm- und Ziehausrüstungen und Fahrwerken (z. B. Schienenfahrwerk, Schreitwerk, Ponton, Schiff) oder mit stationärem Unterbau betrieben werden sollen. Dieses Dokument behandelt nicht die speziellen Gefährdungen, die sich aus diesen zusätzlichen Ausrüstungen und Einrichtungen ergeben.
ANMERKUNG Für diese zusätzlichen Ausrüstungen und Einrichtungen sollten (soweit vorhanden) die speziellen Europäischen Normen beachtet werden, wie z. B.
- für Ramm- und Ziehgeräte: EN 996:1995;
- für Bohrgeräte: EN 791:1995.
Die Anforderungen gelten ergänzend zu den allgemeinen Anforderungen der EN 474-1:2006.
Dieser Teil wiederholt nicht die Anforderungen der EN 474-1:2006, sondern ergänzt oder ersetzt diese für den Einsatz von Seilbaggern.
Dieser Teil beschreibt die geeigneten technischen Maßnahmen, um die Risiken zu mindern oder zu beseitigen, die aufgrund signifikanter Gefährdungen, Gefährdungssituationen und Gefährdungsereignisse während der Inbetriebnahme, des Betriebes, der Instandhaltung von Seilbaggern eintreten können.
Diese Europäische Norm ist nicht anzuwenden für Seilbagger, die vor der Veröffentlichung dieser Europäischen Norm durch CEN hergestellt wurden.
Engins de terrassement - Sécurité - Partie 12: Prescriptions applicables aux pelles à câbles
La présente partie de l’EN 474 traite de tous les phénomènes, situations et événements dangereux significatifs
relatifs aux pelles à câbles telles que définies dans l'EN ISO 6165:2006, lorsqu'elles sont utilisées comme prévu
ou dans des conditions de mauvais usage que le fabricant peut raisonnablement prévoir (voir Article 4).
La présente Norme européenne s’applique également aux pelles à câbles, à leur structure porteuse et à leur
superstructure, lorsqu’elles sont destinées à être utilisées en association avec d’autres équipements ou accessoires,
tels que : équipements de forage, matériels de battage et d’arrachage avec des équipements mobiles (par exemple,
sur rails, sur patins, sur ponton, sur barge) ou des structures porteuses fixes. La présente Norme européenne ne
traite pas des phénomènes dangereux spécifiques engendrés par ces équipements ou accessoires supplémentaires.
NOTE Pour ces équipements ou accessoires supplémentaires, il convient de prendre en considération les Normes
européennes spécifiques correspondantes, lorsqu’elles sont disponibles, par exemple :
— pour le matériel de battage et d’extraction de profilés à battre : EN 996:1995 ;
— pour les appareils de forage : EN 791:1995.
Les prescriptions figurant dans la présente partie viennent en complément des prescriptions communes présentées
dans l’EN 474-1:2006!+A1:2009".
La présente partie ne répète pas les prescriptions de l’EN 474-1:2006!+A1:2009" mais en ajoute ou en remplace
certaines applicables aux pelles à câbles.
La présente partie prescrit les mesures techniques appropriées pour éliminer ou réduire les risques dus
aux phénomènes, situations et événements dangereux significatifs survenant lors de la mise en service,
du fonctionnement et de la maintenance des machines citées dans le domaine d’application.
La présente Norme européenne n’est pas applicable aux pelles à câble fabriquées avant la publication de la présente
Norme européenne par le CEN.
Stroji za zemeljska dela - Varnost - 12. del: Zahteve za bagre s kablom
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 474-12:2007+A1:2008
01-december-2008
Stroji za zemeljska dela - Varnost - 12. del: Zahteve za bagre s kablom
Earth-moving machinery - Safety - Part 12: Requirements for cable excavators
Erdbaumaschinen - Sicherheit - Teil 12: Anforderungen für Seilbagger
Engins de terrassement - Sécurité - Partie 12: Prescriptions applicables aux pelles à
câbles
Ta slovenski standard je istoveten z: EN 474-12:2006+A1:2008
ICS:
53.100 Stroji za zemeljska dela Earth-moving machinery
SIST EN 474-12:2007+A1:2008 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 474-12:2007+A1:2008
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SIST EN 474-12:2007+A1:2008
EUROPEAN STANDARD
EN 474-12:2006+A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2008
ICS 53.100 Supersedes EN 474-12:2006
English Version
Earth-moving machinery - Safety - Part 12: Requirements for
cable excavators
Engins de terrassement - Sécurité - Partie 12: Prescriptions Erdbaumaschinen - Sicherheit - Teil 12: Anforderungen für
applicables aux pelles à câbles Seilbagger
This European Standard was approved by CEN on 17 April 2006 and includes Amendment 1 approved by CEN on 18 August 2008.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 474-12:2006+A1:2008: E
worldwide for CEN national Members.
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SIST EN 474-12:2007+A1:2008
EN 474-12:2006+A1:2008 (E)
Contents Page
Foreword.4
Introduction .5
1 Scope.6
2 Normative references.6
3 Terms and definitions, symbols and abbreviated terms .7
4 List of additional significant hazards .7
5 Safety requirements and/or measures .7
5.1 General.7
5.2 Access.7
5.3 Operator's station.8
5.3.1 General.8
5.3.2 Roll-over protective structures (ROPS).8
5.3.3 Operator's protective guard.8
5.3.4 Operator's seat, vibrations.8
5.4 Operator's controls and indicators.8
5.4.1 Controls for driving and steering.8
5.4.2 Warning indicator.8
5.5 Steering.8
5.6 Swing brakes.8
5.7 Lift system.9
5.7.1 Force controlled operation (lifting, lowering).9
5.7.2 Free fall operation.9
5.7.3 Switch-over.9
5.7.4 Boom.9
5.7.5 Ropes.9
5.7.6 Rope drum, rope pulley.10
5.8 Limiting devices.10
5.8.1 Load moment limiting device .10
5.8.2 Lift limiting switch .10
5.8.3 Limit switch for the boom hoist system.10
5.9 Calculation of the lift capacity.10
5.9.1 Calculation method.10
5.9.2 Rated lift capacity table in object handling application.11
5.10 Requirements of safety related parts of the control system.11
5.11 Stability.11
5.11.1 General.11
5.11.2 Stability in different applications .11
5.11.3 Dragline bucket.11
5.11.4 Grab and front shovel .12
5.11.5 Object handling application.12
5.12 Cable excavator with electrical power source.12
6 Verification of safety requirements/measures.12
7 Information for use .12
7.1 Operation manual.12
Annex A (normative) List of additional significant hazards – Cable excavators.14
Annex B (normative) Requirements for cable excavator swing brakes .15
B.1 General.15
B.2 Terms and definitions .15
B.3 Minimum performance.16
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EN 474-12:2006+A1:2008 (E)
B.3.1 Swing drive system .16
B.3.2 Swing service brake .16
B.3.3 Swing parking brake.17
B.4 Conditions for testing the swing service brake .17
B.5 Test report.17
Annex C (informative) Illustrations.18
C.1 Standard applications.18
C.1.1 Crawler type cable excavator with lifting equipment.18
C.1.2 Crawler type cable excavator with dragline equipment .19
C.1.3 Crawler type cable excavator with grab equipment.19
C.2 Special applications.20
C.2.1 Crawler type cable excavator with hole drilling equipment (casing oscillator).20
C.2.2 Crawler type cable excavator with piling equipment (hydraulic or diesel hammer) .21
C.2.3 Crawler type excavator with wall cutter equipment (diaphragm wall grab) .21
C.3 Wheel type cable excavator in transport position for road travelling.22
Annex ZA (informative) Relationship between this European Standard and the Essential Requirements
of EU Directive 98/37/EC .23
Annex ZB (informative) !!!!Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC"""".24
Bibliography.25
Figures
Figure B.1 — Swing service brake.16
Figure C.1.1 — Crawler type cable excavator with lifting system .18
Figure C.1.2 — Crawler type cable excavator with dragline equipment .19
Figure C.1.3 — Crawler type cable excavator with grab equipment .19
Figure C.2.1 — Crawler type excavator with hole drilling equipment (casing oscillator).20
Figure C.2.2 — Crawler type cable excavator with piling equipment (hydraulic or diesel hammer).21
Figure C.2.3 — Crawler type excavator with wall cutter equipment (diaphragm wall grab).21
Figure C.3 — Wheel type cable excavator in transport position for road travelling .22
Tables
Table 1 — Safety factors of ropes.9
Table A.1 — List of additional significant hazards .14
3
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SIST EN 474-12:2007+A1:2008
EN 474-12:2006+A1:2008 (E)
Foreword
This document (EN 474-12:2006+A1:2008) has been prepared by Technical Committee CEN/TC 151 “Construction
equipment and building material machines — Safety”, the secretariat of which is held by DIN.
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 April 2009, and conflicting national standards shall be withdrawn at the latest by
December 2009.
This document supersedes EN 474-12:2006.
This document includes Amendment 1, approved by CEN on 2008-08-18.
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.
!For relationship with EU Directive(s), see informative Annexes ZA and ZB, which are integral parts of this
document."
For bibliographic references, see EN 474-1:2006.
EN 474 "Earth-moving machinery — Safety" comprises the following parts:
Part 1: General requirements
Part 2: Requirements for tractor-dozers
Part 3: Requirements for loaders
Part 4: Requirements for backhoe-loaders
Part 5: Requirements for hydraulic excavators
Part 6: Requirements for dumpers
Part 7: Requirements for scrapers
Part 8: Requirements for graders
Part 9: Requirements for pipelayers
Part 10: Requirements for trenchers
Part 11: Requirements for earth and landfill compactors
Part 12: Requirements for cable excavators
This European Standard is intended for use in combination with Part 1 of the series.
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, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.
4
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SIST EN 474-12:2007+A1:2008
EN 474-12:2006+A1:2008 (E)
Introduction
This part of EN 474 is a type C standard as stated in EN ISO 12100-1:2003.
The machinery concerned and the extent to which hazards, hazardous situations and events are covered are indi-
cated in the scope of this European Standard.
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 de-
signed and built according to the provisions of this type C standard.
5
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SIST EN 474-12:2007+A1:2008
EN 474-12:2006+A1:2008 (E)
1 Scope
This part of EN 474 deals with all significant hazards, hazardous situations and events relevant to cable excavators
as defined in EN ISO 6165:2006, when they are used as intended and under conditions of misuse which are
reasonably foreseeable by the manufacturer (see Clause 4).
This European Standard applies also to cable excavators, their undercarriage and upper-structure, if intended for
use in combination with other equipment or attachment, such as drill rigs, pile driving and extracting equipment and
moving equipment (e.g. rail track, walking legs, pontoon, ship) or stationary undercarriage. This European Standard
is not dealing with the specific hazards due to these additional equipment or attachment.
NOTE For these additional equipment or attachment, relevant specific European Standards should be considered where
available, for example:
for pile driving and extracting equipment: EN 996:1995;
for drill rigs: EN 791:1995.
The requirements of this part are complementarily to the common requirements formulated in EN 474-1:2006.
This part does not repeat the requirements from EN 474-1:2006, but adds or replaces the requirements for
application for cable excavators.
This part specifies the appropriate technical measures to eliminate or reduce risks arising from the significant
hazards, hazardous situations and events during commissioning, operation and maintenance of the machinery in
the scope.
This European Standard is not applicable to cable excavators manufactured before the date of publication of this
European Standard by CEN.
2 Normative references
The following referenced documents are indispensable for the application of this European Standard. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced document
(including any amendments) applies.
EN 474-1:2006, Earth-moving machinery — Safety — Part 1: General requirements.
EN 791:1995, Drill rigs — Safety.
EN 12643:1997, Earth-moving machinery — Rubber-tyred machines — Steering requirements (ISO 5010:1992,
modified).
EN 60204-32:1998, Safety of machinery — Electrical equipment of machines — Part 32: Requirements for hoisting
machines (IEC 60204-32:1998).
EN ISO 2867:2006, Earth-moving machinery — Access systems (ISO 2867:2006).
EN ISO 6165:2006, Earth-moving machinery — Basic types — Identification and terms and definitions (ISO
6165:2006).
EN ISO 7096:2000, Earth moving machinery — Laboratory evaluation of operator seat vibration (ISO 7096:2000).
EN ISO 12100-1:2003, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic
terminology, methodology (ISO 12100-1:2003).
ISO 4310:1981, Cranes — Test code and procedures.
ISO 6014:1986, Earth-moving machinery — Determination of ground speed
6
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SIST EN 474-12:2007+A1:2008
EN 474-12:2006+A1:2008 (E)
ISO 7546:1983, Earth moving machinery — Loader and front loading excavator buckets — Volumetric ratings.
ISO 10262:1998, Earth-moving machinery — Hydraulic excavators — Laboratory tests and performance
requirements for operator protective guards.
ISO 15219:2004, Earth-moving machines — Cable excavators — Terminology and commercial specifications.
3 Terms and definitions, symbols and abbreviated terms
For the purposes of this European Standard, the terms and definitions given in EN 474-1:2006,
EN ISO 12100-1:2003, ISO 15219:2004 and the following apply.
NOTE 1 !The terms used for cable excavators" are defined in ISO 15219:2004 and illustrated in Annex C.
NOTE 2 Definitions used in EN and ISO standards referred to in this European Standard are also valid for this document.
3.1
cable excavator
excavator (see EN ISO 6165:2006), having a wire rope-operated upper structure primarily designed for excavating
with a dragline bucket, a front shovel or grab, used for compacting material with a compaction plate, for demolition
work by hook or ball and for material handling with special equipment and attachment
3.2
boom hoist system
consists of the boom (lower-, intermediate- and head-section), the A-frame system and the boom hoist winch
system
3.3
lift system
consists of the main winch system used for earth-moving-, demolition-, compaction- and object-handling (e. g. with
hook assembly) application
4 List of additional significant hazards
See Annex A
NOTE Annex A (normative) contains all the significant hazards, hazardous situations and events, as far as they are dealt
with in this European Standard, identified by risk assessment as significant for this type of machinery and which require action to
eliminate or reduce the risk.
5 Safety requirements and/or measures
5.1 General
Cable excavators shall comply with the requirements of EN 474-1:2006, as far as not modified or replaced by the
requirements of this part.
5.2 Access
EN 474-1:2006, 5.2 applies with the following exception:
Dimension code G in Figure 2 of EN ISO 2867:2006 may be > 600 mm when the hand rails/handholds are placed
in the door opening.
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EN 474-12:2006+A1:2008 (E)
5.3 Operator's station
5.3.1 General
EN 474-1:2006, 5.3 applies with the following provision:
5.3.2 Roll-over protective structures (ROPS)
EN 474-1:2006, 5.3.3 does not apply for cable excavators.
5.3.3 Operator's protective guard
EN 474-1:2006, 5.3.4 is replaced by the following:
Cable excavators shall be designed so that an operator’s protective structure (top and front guard) can be fitted.
A protective structure (top and front guard) shall be offered by the manufacturer and selected by the user according
to the existing risk of the application. The protective structures shall be in accordance with ISO 10262:1998 (see
Clause 7).
5.3.4 Operator's seat, vibrations
EN 474-1:2006, 5.4.1.4 applies with the following additions:
The seat shall meet the EN ISO 7096:2000 input spectral class EM 6.
5.4 Operator's controls and indicators
5.4.1 Controls for driving and steering
EN 474-1:2006, 5.5.1 d) and 5.6.1 apply with the following addition relating to controls for driving and steering.
The movements of the controls for driving and steering do not need to correspond to the intended direction of
movement if the upper structure is not in the normal driving direction.
5.4.2 Warning indicator
EN 474-1:2006, 5.5.1 applies with the following additions:
Warning indicators shall be provided at the operator's station or other relevant location to indicate the activation of
the free fall operations (see 5.7.2) and to indicate the deactivation of the load moment limiting devices (see 5.8.1)
during dragline bucket, grab and front shovel application.
5.5 Steering
EN 474-1:2006, 5.6 applies with the following exception:
EN 474-1:2006, 5.6.2 applies only for rubber-tyred cable excavators with a travelling speed of more than 30 km/h
measured according to ISO 6014:1986.
For rubber-tyred machines with a travel speed equal or lower than 30 km/h EN 12643:1997 shall be applied, except
for the requirements for emergency steering.
5.6 Swing brakes
Cable excavators shall be equipped with swing service and swing parking brake systems, which shall meet the
requirements as defined in Annex B.
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EN 474-12:2006+A1:2008 (E)
5.7 Lift system
5.7.1 Force controlled operation (lifting, lowering)
The lift system of cable excavators shall be fitted with a brake, which actuates immediately after releasing lever or
pedal controls.
The brake system shall automatically act in case of loss of energy or force controlled lowering. There shall be no
effect on stability of the excavator during this operation.
The brake system shall be capable to hold the rated load, as defined in 5.9.
5.7.2 Free fall operation
The lift system of cable excavators shall be fitted with a brake, which applies immediately after:
corresponding activation of the pedal control, or
release of hand-operated lever control.
The brake shall be so designed that a dynamic load and a progressive actuation is possible. The rope guide shall
be so designed that an uncontrolled run-up or run-off of the rope is avoided.
5.7.3 Switch-over
There shall be no load lowering in case of switchover from the “force controlled lift/lowering" operation to the opera-
tion ”free fall”.
5.7.4 Boom
The boom of cable excavators shall be secured against repulsing in case of a sudden release of the load.
The boom shall be equipped with a limit switch to avoid a backward overload.
The connection (bolts) of the boom-pieces shall be so designed that mounting and disassembling can be made
without the need for a person staying under the boom.
5.7.5 Ropes
The ropes of cable excavators shall have safety factors according to Table 1.
Table 1 — Safety factors of ropes
Attachments:
Dragline
a
Group 1
Grab
Hook
Lift or closing Digging ropes Boom-holding ropes
ropes
Operating with load connected Lifting the boom without load
Active ropes Static ropes Active ropes Static ropes
3,55 3,0 3,55 3,0 3,05 3,0
a
Group 1: The factors are the relation between the minimum breaking force of the rope and the maximum static load of the
cable excavator when used as intended.
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EN 474-12:2006+A1:2008 (E)
5.7.6 Rope drum, rope pulley
5.7.6.1 General
The rope drum and rope pulley shall be built and designed so that damage of the rope and run-off or trip-out of the
rope guide is avoided.
5.7.6.2 Rope drum
The relationship between the rope drum diameter and the rope diameter shall be 1:20 at a minimum.
5.7.6.3 Rope pulley
The relationship between the rope pulley diameter and the rope diameter shall be 1:22 at a minimum, measured at
thread of groove. Exceptions from the above requirements can be made for fair leads of drag ropes, rope guidance
pulleys and auxiliary ropes, such as grab guidance rope, digging guidance rope, ballast guidance rope of fair leads.
5.7.6.4 Flanged wheel projection
The beaded edge of the winch drums shall be at least 1,5 times the rope diameter.
5.8 Limiting devices
5.8.1 Load moment limiting device
The lift system and boom hoist system of cable excavators in object handling application shall have a load moment
limiting device to avoid overload. The load moment limiting device shall be adjusted to the rated load as defined
in 5.9 with a tolerance of + 10 %. Operations, which will reduce the load moment, shall be possible after functioning
of the load moment limiting device.
5.8.2 Lift limiting switch
Cable excavators in object handling application shall be equipped with a limiting switch for lifting movement. It shall
be possible to lower the load after activation of the lift limiting switch.
5.8.3 Limit switch for the boom hoist system
The boom hoist system of cable excavators shall be equipped with a limiting switch to avoid a backward overload
of the boom. Boom lowering shall be possible after actuation of this limiting switch.
5.9 Calculation of the lift capacity
5.9.1 Calculation method
The calculation of the lift capacity of cable excavators shall be made on the basis of the following criteria:
flat surface;
hard surface (depth of penetration = 0);
tipping line according to 5.5 of EN 791:1995;
load test according to 3.3 of ISO 4310:1981.
The tipping load of a cable excavator P shall be calculated as follows:
tip
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EN 474-12:2006+A1:2008 (E)
9,81×m×X
[N]
P =
tip
R
where
m is the mass of the cable excavator including the mass of the equipment (e. g. boom, jib) [kg];
X is the horizontal distance of the centre of gravity of m to the smallest tipping line according to 5.5 of
EN 791:1995;
...
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