Drilling and foundation equipment - Safety - Part 5: Diaphragm walling equipment

This European Standard, together with part 1, deals with all significant hazards for diaphragm walling equipment when they are used as intended and under the conditions of misuse which are reasonably foreseeable by the manufacturer associated with the whole life time of the machine (see Clause 4).
The requirements of this part are complementary to the common requirements formulated in EN 16228-1:2014+A1:2021.
This document does not repeat the requirements from EN 16228-1:2014+A1:2021, but adds or replaces the requirements for application for diaphragm walling equipment.

Geräte für Bohr- und Gründungsarbeiten - Sicherheit - Teil 5: Geräte für Schlitzwandarbeiten

Diese Europäische Norm behandelt zusammen mit Teil 1 alle signifikanten Gefährdungen für Geräte für Schlitzwandarbeiten, wenn sie bestimmungsgemäß und unter den Bedingungen der Fehlanwendung, die ver-nünftigerweise vom Hersteller vorhersehbar sind und mit der gesamten Lebensdauer der Maschine in Verbindung stehen, verwendet werden (siehe Abschnitt 4).
Die Anforderungen in diesem Teil gelten zusätzlich zu den in EN 16228-1:2014 gestellten Anforderungen.
Das vorliegende Dokument wiederholt nicht die Anforderungen von EN 16228-1, sondern ergänzt oder ersetzt die Anforderungen für die Anwendung von Geräten für Schlitzwandarbeiten.

Machines de forage et de fondation - Sécurité - Partie 5 : Machines pour parois moulées

La présente Norme européenne traite, avec la partie 1, de tous les phénomènes dangereux significatifs liés aux machines pour parois moulées, lorsqu'elles sont utilisées normalement et dans les conditions de mauvaise utilisation raisonnablement prévisibles par le fabricant, associés à toute la durée de vie des machines (voir Article 4).
Les prescriptions figurant dans la présente partie viennent en complément des prescriptions communes spécifiées dans l'EN 16228-1:2014+A1:2021.
Le présent document ne répète pas les prescriptions de l'EN 16228-1:2014+A1:2021, mais ajoute ou remplace les prescriptions applicables aux machines pour parois moulées.

Oprema za vrtanje in temeljenje - Varnost - 5. del: Oprema za izdelavo membranskih sten (vključno z dopolnilom A1)

Ta evropski standard skupaj s 1. delom obravnava vsa večja tveganja za opremo za izdelavo membranskih sten, če se uporablja, kot je bilo predvideno, in pod pogoji nepravilne uporabe, ki jih je razumno predvidel proizvajalec, v zvezi s celotno življenjsko dobo opreme (glej točko 4).
Zahteve iz tega dela dopolnjujejo splošne zahteve, navedene v standardu EN 16228-1:2014+A1:2021.
Ta dokument ne ponavlja zahtev iz standarda EN 16228-1:2014+A1:2021, temveč dodaja ali nadomešča zahteve za uporabo opreme za izdelavo membranskih sten.

General Information

Status
Published
Publication Date
23-Jan-2022
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
29-Dec-2021
Due Date
05-Mar-2022
Completion Date
24-Jan-2022

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Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 16228-5:2014+A1:2022
01-marec-2022
Oprema za vrtanje in temeljenje - Varnost - 5. del: Oprema za izdelavo
membranskih sten (vključno z dopolnilom A1)
Drilling and foundation equipment - Safety - Part 5: Diaphragm walling equipment
Geräte für Bohr- und Gründungsarbeiten - Sicherheit - Teil 5: Geräte für
Schlitzwandarbeiten
Machines de forage et de fondation - Sécurité - Partie 5 : Machines pour parois moulées
Ta slovenski standard je istoveten z: EN 16228-5:2014+A1:2021
ICS:
53.100 Stroji za zemeljska dela Earth-moving machinery
93.020 Zemeljska dela. Izkopavanja. Earthworks. Excavations.
Gradnja temeljev. Dela pod Foundation construction.
zemljo Underground works
SIST EN 16228-5:2014+A1:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 16228-5:2014+A1:2022

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SIST EN 16228-5:2014+A1:2022


EN 16228-5:2014+A1
EUROPEAN STANDARD

NORME EUROPÉENNE

December 2021
EUROPÄISCHE NORM
ICS 93.020 Supersedes EN 16228-5:2014
English Version

Drilling and foundation equipment - Safety - Part 5:
Diaphragm walling equipment
Machines de forage et de fondation - Sécurité - Partie 5: Geräte für Bohr- und Gründungsarbeiten - Sicherheit -
Machines pour parois moulées Teil 5: Geräte für Schlitzwandarbeiten
This European Standard was approved by CEN on 6 March 2014 and includes Amendment 1 approved by CEN on 22 November
2021.

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, 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.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 16228-5:2014+A1:2021 E
worldwide for CEN national Members.

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SIST EN 16228-5:2014+A1:2022
EN 16228-5:2014+A1:2021 (E)
Contents Page
European foreword . 3
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 List of additional significant hazards . 8
5 Safety requirements and/or protective measures . 9
5.1 General . 9
5.2 Requirements for strength and stability . 9
5.2.1 General . 9
5.2.2 Loads from diaphragm wall cutting tools . 9
5.2.3 Stability of diaphragm walling rig . 9
5.3 Winches and pulleys . 11
5.4 Control devices . 11
5.4.1 General . 11
5.4.2 Control of the diaphragm walling rig equipped with cutter . 11
5.4.3 Control of winches for suspending grabs or cutters when changing ropes . 12
5.4.4 !Free fall operation" . 12
5.5 Moving parts involved in the process . 14
5.6 Maintenance of diaphragm wall cutters . 14
5.7 Hose and cable handling systems . 14
5.8 !Holding brake" . 14
5.9 !Compatibility of the carrier machine" . 14
5.10 Inclination of the carrier . 14
5.11 !Operating position(s)" . 14
5.12 !Noise" . 15
6 Verification of the safety requirements and/or protective measures . 15
6.1 General . 15
7 Information for use . 17
7.1 Operator’s manual . 17
7.1.1 General . 17
7.1.2 Specific instructions on the diaphragm wall cutting tools put on the market
separetely . 17
7.2 Maintenance instructions . 18
Annex A (normative) Noise test code . 19
Annex ZA (informative) !Relationship between this European Standard and the essential
requirements of Directive 2006/42/EC aimed to be covered" . 20
Bibliography . 24

2

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SIST EN 16228-5:2014+A1:2022
EN 16228-5:2014+A1:2021 (E)
European foreword
This document (EN 16228-5:2014+A1:2021) 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 June 2022 and conflicting national standards shall be
withdrawn at the latest by June 2022.
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 16228-5:2014".
This document includes Amendment 1 approved by CEN on 22 November 2021.
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 Standardization Request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s) / Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral
part of this document.
This European Standard is divided into several parts and covers drilling and foundation equipment.
Part 1 contains requirements that are/may be common to all drilling and foundation equipment. Other
parts contain additional requirements for specific machines that supplement or modify the
requirements of part 1. Compliance with the clauses of part 1 together with those of a relevant specific
part of this standard giving requirements for a particular machine provides one means of conforming
with the essential health and safety requirements of the Directive concerned.
When a relevant specific part does not exist, part 1 can help to establish the requirements for the
machine, but will not by itself provide a means of conforming to the relevant essential health and safety
requirements of the Directive.
This European Standard, EN 16228, Drillling and foundation equipment – Safety, consists of the
following parts:
 Part 1: Common requirements
 !Part 2: Mobile drill rigs for civil and geotechnical engineering in soil or soil and rock mixture"
 Part 3: Horizontal directional drilling equipment (HDD)
 Part 4: Foundation equipment
 Part 5: Diaphragm walling equipment
 Part 6: Jetting, grouting and injection equipment
3

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SIST EN 16228-5:2014+A1:2022
EN 16228-5:2014+A1:2021 (E)
 Part 7: Interchangeable auxiliary equipment
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: 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 the
United Kingdom.

4

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SIST EN 16228-5:2014+A1:2022
EN 16228-5:2014+A1:2021 (E)
Introduction
This European Standard is a type C standard as stated in EN ISO 12100.
The machinery concerned and the extent to which hazards are covered are indicated in the scope of this
standard.
When provisions of this type C standard are different from those which are stated in type A or B
standards, the provisions of this type C standard take precedence over the provisions of the other
standards, for drilling and foundation equipment that have been designed and built according to the
provisions of this type C standard.

5

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SIST EN 16228-5:2014+A1:2022
EN 16228-5:2014+A1:2021 (E)
1 Scope
This European Standard, together with part 1, deals with all significant hazards for diaphragm walling
equipment when they are used as intended and under the conditions of misuse which are reasonably
foreseeable by the manufacturer associated with the whole life time of the machine (see Clause 4).
The requirements of this part are complementary to the common requirements formulated in
!EN 16228-1:2014+A1:2021".
This document does not repeat the requirements from !EN 16228-1:2014+A1:2021", but adds or
replaces the requirements for application for diaphragm walling equipment.
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 474-5:2006+A3:2013, Earth-moving machinery — Safety — Part 5: Requirements for hydraulic
excavators
EN 474-12:2006+A1:2008, Earth-moving machinery — Safety — Part 12: Requirements for cable
excavators
!EN 16228-1:2014+A1:2021", Drilling and foundation equipment — Safety — Part 1: Common
requirements
!EN 16228-4:2014+A1:2021, Drilling and foundation equipment — Safety — Part 4: Foundation
equipment
EN 13000:2010+A1:2014, Cranes — Mobile cranes"
EN ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk
reduction (ISO 12100:2010)
ISO 6395:2008, Earth-moving machinery — Determination of sound power level — Dynamic test
conditions
ISO 6396:2008, Earth-moving machinery — Determination of emission sound pressure level at operator’s
position — Dynamic test conditions
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 12100:2010,
!EN 16228-1:2014+A1:2021" and the following apply.
3.1
diaphragm wall
structural retaining wall or cut-off wall, both of which can be impermeable and constructed in-situ in
the ground as a series of contiguous panels
Note 1 to entry: Panels are typically narrow but deep and are cut between surface guide walls and can depend
on a slurry or mud suspension for temporary ground support. Structural walls are typically of reinforced concrete
with the concrete placed from the bottom of the panel upwards to displace the slurry or mud suspension.
Note 2 to entry: There are other diaphragm wall techniques, for example continuous trenchers; these
techniques use machines and cutting tools such as digging chain or wheel disc, which are covered by EN 474–10.
6

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EN 16228-5:2014+A1:2021 (E)
3.2
diaphragm walling equipment
equipment for cutting panels for diaphragm walls
3.3
!diaphragm walling rig
carrier machine equipped with diaphragm wall cutting tool
Note 1 to entry: The diaphragm walling rig is either:
— a complete machine satisfying this document, or
— a carrier machine able to withstand dynamic loads as specified in 5.2 with interchangeable equipment
in the form of diaphragm wall cutting tools, which can be provided by different suppliers or manufacturers.
Note 2 to entry: The carrier machine is, e.g.:
— foundation equipment as defined in EN 16228–4:2014+A1:2021; or
— a crane as defined in EN 13000:2010+A1:2014; or
— a cable excavator as defined in EN 474–12:2006+A1:2008; or
— a hydraulic excavator as defined in EN 474–5:2006+A3:2013."
3.4
diaphragm wall cutting tool
tool for cutting panels for diaphragm walls
Note 1 to entry: Diaphragm wall cutting tools can either be:
— diaphragm wall grab, see definition 3.5;
— diaphragm wall cutter, see definition 3.6.
Note 2 to entry: Diaphragm wall cutting tools can be rope suspended and guided by frames or kelly bars.
3.5
diaphragm wall grab
clamshell grab within a guide device for cutting a diaphragm wall either hydraulically or rope operated
Note 1 to entry: See illustration A.2.24 of !EN 16228–1:2014+A1:2021".
3.6
diaphragm wall cutter
assembly of counter-rotating cutting or milling wheels within a guide body used to break up soil or rock
for cutting a diaphragm wall
Note 1 to entry: There are other non-mechanical diaphragm wall cutting tools used in the construction of a
diaphragm wall such as a chisel and are not covered by this document.
Note 2 to entry: See illustration A.2.25 of !EN 16228–1:2014+A1:2021".
3.7
recovery
extraction of a diaphragm wall cutting tool
7

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EN 16228-5:2014+A1:2021 (E)
Note 1 to entry: For example, grab or cutter when it is stuck in the panel.
!3.8
triggering of free fall
action (manual or automatic) that causes the starting of the free-fall"
4 List of additional significant hazards
Clause 4 of !EN 16228-1:2014+A1:2021" applies with the following additional Table 1.
Table 1 of !EN 16228-1:2014+A1:2021" with the additional Table 1 in this document contain all
hazards, (hazardous situations and events), identified by risk assessments as significant for diaphragm
walling equipment and which require action to eliminate or reduce risk.
Hazards generally occur under the following conditions:
— in transportation to and from the work site;
— in rigging and dismantling on the work site;
— in service on the work site;
— when moving between working positions on the work site;
— out of service on the work site;
— in storage at the plant depot or on the work site;
— maintenance;
— changing diaphragm wall cutting tools and their components;
— changing ropes used to suspend diaphragm cutting wall tools.
!Table 1 — List of additional significant hazards and associated requirements
No. Hazard Relevant clause(s) in

this standard
1 Mechanical hazards and events
1.1 Inadequacy of mechanical strength 5.2.2, 5.2.3
1.2 Overturning 5.2.3, 5.3, 5.4.4, 5.10,
5.11, 6, 7.1
1.3 From inadequate design of pulleys, drums 5.3
1.4 From inadequate selection of ropes 5.3
1.5 Ejection of teeth from milling cutters 7.1
1.6 Impact through excessive oscillation of tools when tramming 7.1
1.7 Uncontrolled release of lifted load 5.4.4, 5.9
2 Elementary forms of mechanical hazards
2.1 Crushing/shearing between jaws of grabs 5.5, 7.1, 7.2
2.2 Drawing–in/trapping from teeth of milling cutters 5.4.2, 5.6, 7.1, 7.2
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EN 16228-5:2014+A1:2021 (E)
No. Hazard Relevant clause(s) in
this standard
2.3 Crushing/entanglement/drawing-in/ abrasion when replacing 5.4.3, 5.7, 7.1, 7.2
ropes
3 Fall of persons during access to (or at/from) the work position 7.1, 7.2
(including changing ropes)
4 Hazards generated by noise, resulting in:
4.1 Hearing losses and physiological disorders 5.12, Annex A
4.2 Accidents due to interference with speech communication and 5.12, Annex A
warning signals
5 Inadequacy of the machine with the carrier 5.9
"
5 Safety requirements and/or protective measures
5.1 General
Diaphragm walling equipment shall comply with the requirements of !EN 16228-
1:2014+A1:2021" except as modified or replaced by the requirements of this part of the standard.
!For the compatibility between the diaphragm walling equipment and the carrier machine, see
5.9."
5.2 Requirements for strength and stability
5.2.1 General
Subclause 5.2 of !EN 16228-1:2014+A1:2021" applies with the following additions:
5.2.2 Loads from diaphragm wall cutting tools
When calculating stability in accordance with !EN 16228-1:2014+A1:2021" the following shall be
taken into account:
— weight of the diaphragm wall cutting tools (including any hose and cable handling system and their
mounts);
— weight of the excavated material, slurry or suspension materials and any material adhering to the
tool;
— loads applied to the tools during tool extraction;
— all loads induced by rope suspended components are acting at the point where the rope is leaving
the upper pulley.
5.2.3 Stability of diaphragm walling rig
5.2.3.1 General
Diaphragm walling equipment can have diaphragm wall cutting tools either rope suspended or guided
by frames or kelly bars rigidly connected to the carrier machine.
In both cases a general method for calculating stability shall be used, see 5.2.3.2 below.
9

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For rope suspended cutting tools, a simplified method for calculating stability may be used, see 5.2.3.3
below which differs from subclause 5.2.3 of !EN 16228-1:2014+A1:2021".
The simplified method ensures the equipment is stable only when the working platform is horizontal.
Therefore it cannot be used when working on slopes and travelling.
5.2.3.2 General method for calculating stability
The required stability angle as mentioned in 5.2.3.5 of !EN 16228-1:2014+A1:2021" shall be as
stated in Table 2 below:
Table 2 — Required stability angle, dynamic influences included
 Stability class NC Stability class SC
(normal conditions) (special conditions)
Travelling 8 degrees 5 degrees + β (see c) below)
Operating and tramming 5 degrees a
2,5 degrees + β (see c) below)
Recovery 3,5 degrees 1 degree + β (see c) below)
a
A static stability angle of 5 degrees + β (see c) below) calculated without dynamic accelerations and
wind loads is also required.
NC and SC are the stability classes (see explanations below).
Use of stability class NC is recommended.
The manufacturer may use stability class SC provided that all of the following conditions are fulfilled:
a) The ground shall support the machine and can reliably withstand the supporting forces, without
significant unintended displacements or taking into account their affect on stability (support by, e.g.
timber plates, steel plates and/or improved ground surface may be required). This shall also be
shown in the case, if supports (those not causing rigid body movement) become unloaded and thus
cause maximum forces at other supports.
b) Masses of relevant parts of the machine shall be evaluated by weighing with an accuracy of ± 2,5 %.
c) When using tipping line 1 as defined in Figure 1 of !EN 16228-1:2014+A1:2021" the required
tipping angle shall be increased by β.
d) Hoist speed is not greater than 10 m/min.
e) No free fall winch mode is used.
f) Freely suspended loads are secured when travelling and tramming, in order to avoid swinging.
5.2.3.3 Simplified method for calculating stability
The calculation of stability shall be done in the most unfavourable position of track orientation and at
the maximum operating radius on the horizontal platform.
The sum of all overturning moments shall not exceed 75 % of the sum of all stabilizing moments, where
the stabilizing and tipping moments include:
— the base machine alone, its tipping moment is given by the load chart for the actual boom
configuration. The safety percentage given by the manufacturer has to be converted to 100 % in
order to get of limit tipping moment;
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EN 16228-5:2014+A1:2021 (E)
— additional equipment permanently mounted to the carrier machine, e.g. power pack, guiding
system, hose reels, special boom head, walkways, etc. Moments are calculated with the load at the
distance of the tipping line.
When using a rope suspended grab:
— the moment induced by the weight of the rope suspended part multiplied by 1,25 (excavating tool,
3
with clamshells full of soil of specific weight = 20 kN/m ).
When using a rope suspended cutter:
— moment induced by the weight of the cutter with full hydraulic hoses;
— moment induced by the weight of mud hose. Depending on the configuration of mud circuit
(suspended on the boom or hose reel at the back of the machine) the mud weight can create tipping
or stabilizing moments. So the stability has to be calculated with full and/or empty mud hose;
3
— minimum specific weight of mud = 12,5 kN/m .
5.3 Winches and pulleys
Subclauses 5.8.2 and 5.8.3 of !EN 16228-1:2014+A1:2021" apply with following additions and/or
modifications:
For working ropes used to lift cutting tools only, the minimum factor of safety (minimum breaking load,
guaranteed by the manufacturer, in relation to the maximum static load on the rope caused by the
winch line pull in the first layer) shall be 2,5.
Diameters of sheaves and drums used to lift the excavation tools only shall meet the following minimum
requirements:
winch drum pitch: 16,0 d
sheave pitch: 16,0 d
compensation pulley: 14,0 d
where d is the diameter of the rope.
!deleted text"
5.4 Control devices
5.4.1 General
Subclause 5.16 of !EN 16228-1:2014+A1:2021" applies with the additions of 5.4.2 and 5.4.3:
5.4.2 Control of the diaphragm walling rig equipped with cutter
During operation, the diaphragm wall cutter shall be controlled from the diaphragm walling rig
operator’s position.
Diaphragm walling rigs shall be designed and equipped with a remote control for providing slow
rotation speed and to give the operator/maintenance staff clear view of a cutter during maintenance
tasks and assembly/dismantling.
!Freefall mode shall be prevented on the winches of the diaphragm walling rigs fitted with
diaphragm wall cutter as defined in 3.6 (e.g. by a key-operated control)."
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5.4.3 Control of winches for suspending grabs or cutters when changing ropes
!There shall be a control station adjacent or close to each winch with a full view to the winch (e.g.
remote control).
The mode for changing ropes shall be activated by a lockable mode selector.
In this mode, the maximum rotation speed shall be limited to 2 rpm.
It shall not be possible to operate more than one winch at the same time. This control shall be of hold-
to-run type.
From the control station for this mode, it shall be possible to have a view to the winch and the person
guiding the rope for handling and communication.
Controls (for use in this mode) shall either be located close to the winches involved and allow full
visibility of the winches or on a remote device that will allow only operation of the winches. Enabling of
a remote control shall be done at the operator station and can be combined with the mode selector
function.
It shall not be possible for the normal winch controls at the operator station to operate the winches
whilst the mode for changing ropes is activated."
5.4.4 !Free fall operation
5.4.4.1 General
Diaphragm walling equipment designed for free fall operation shall comply with 5.4.4.2 to 5.4.4.5.
5.4.4.2 Common requirements for free fall operation
The free-fall system shall be designed that an uncontrolled run-up or run-off of the rope is avoided, e.g.
by a rope guide.
There shall be a specific lockable selector (e.g. could be integrated in the mode selector) to
enable/disable the free-fall operation.
There may be one selector for all winches or one selector per winch.
The design of the free-fall system may provide different types of operation (automatic/manual) as well
as different types of deactivation (automatic/manual) and triggering (automatic/manual) as described
in 5.4.4.3 to 5.4.4.5.
These different types shall be selected either by a separate control or by the lockable free-fall operation
selector.
The selected type shall be indicated at the operator´s station.
5.4.4.3 Free fall brake
The winch shall be fitted with a free fall brake.
The use of the main winch disconnecting system shall only be possible when the free-fall function is
activated.
The free fall brake shall be designed that the deceleration of a dynamic load shall be possible.
A proportional actuation of the free-fall brake shall be possible.
5.4.4.4 Manual free-fall operation
5.4.4.4.1 General
Manual free-fall operation shall only be possible for following conditions:
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— free-fall operation is selected;
— free-fall function is activated.
5.4.4.4.2 Activation/deactivation of free fall function
Activation of free-fall function shall only be possible by actuation of two independent controls
simultaneously (e.g. pedals and additional control). In accordance with EN 16228-1:2014+A1:2021,
5.8.2, both controls shall be of the hold-to-run type.
There shall be no lowering at activating/deactivating the free-fall function.
The free fall function can be with an automatic deactivation (see 5.4.4.4.3) or manual deactivation (see
5.4.4.4.4).
Triggering after activation of the free-fall function
...

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