SIST EN 12629-7:2004+A1:2010
(Main)Machines for the manufacture of constructional products from concrete and calcium-silicate - Safety - Part 7: Stationary and mobile equipment for long line manufacture of prestressed products
Machines for the manufacture of constructional products from concrete and calcium-silicate - Safety - Part 7: Stationary and mobile equipment for long line manufacture of prestressed products
1.1 This part of EN 12629, taken together with EN 12629-1:2000+A1:2010, applies to stationary and mobile equipment for the benched manufacture of prestressed products. The manufacturing bed is a machine with which other associated machines work simultaneously. Moreover, these machines are generally used on beds installed in parallel.
EN 12629-1:2000+A1:2010 specifies general requirements applicable to machines for the manufacture of constructional products from concrete and calcium silicate.
This document specifies the additional requirements to and/or the deviations from EN 12629-1:2000+A1:2010 specific to the machines it covers.
1.2 This standard gives particular requirements for the design of the following machines:
- Pre-stressing bed (schematic representation is given in annex A);
- Bed sweeper, vacuum cleaner, oiler, wire-guide machine (schematic representation is given in annex B);
- Bed layout machine (schematic representation is given in annex C);
- Strand pushing/pulling machine (schematic representation is given in annex D);
- Spinner, extruder, vibrodistributor (schematic representation is given in annex E);
- Tarpaulin paying out and winding in machine (schematic representation is given in annex F);
- Sawing machine (schematic representation is given in annex G).
NOTE The manufacturing operations include some or all of the following:
- treating pre-stressing bed with release agent;
- "marking out" the elements (slabs, plain slabs, etc.) to be made;
- running the pre-stressing strands;
- pre-tensioning;
- installing the shutterings, (formwork, side shutters, end plates and inserts)
- fixing reinforcement;
- tensioning;
- concrete distribution and compaction;
- winding out the tarpaulin;
- heating;
- detensioning;
- removal of shettering, formwork, etc. ;
- strands cutting or sawing;
- removal of final products;
- bed cleaning.
The concrete supply interface which is taken into account for safety is also considered.
Maschinen für die Herstellung von Bauprodukten aus Beton und Kalksandsteinmassen - Sicherheit - Teil 7: Stationäre und fahrbare Einrichtungen für die Herstellung von Spannbetonelementen
1.1 !Dieser Teil von EN 12629, zusammen mit EN 12629 1:2000A1:2010, gilt für stationäre und fahrbare Einrichtungen für die Herstellung von Spannbetonelementen. Die Produktionsbank ist eine Maschine, die mit anderen angeschlossenen Maschinen simultan arbeitet. Außerdem werden diese Maschinen im Allgemeinen auf Betten verwendet, die parallel installiert sind.
EN 12629 1:2000A1:2010 spezifiziert allgemeine Anforderungen, die für Maschinen für die Herstellung von Bauprodukten aus Beton und Kalksandsteinmassen gelten.
Dieses Dokument beschreibt die zusätzlichen Anforderungen für und/oder Abweichungen von EN 12629 1:2000A1:2010, die spezifisch für die Maschinen sind, die es abdeckt."
1.2 Diese Norm enthält besondere Anforderungen für die Konstruktion folgender Maschinen:
- Spannbettanlage (schematische Darstellung in Anhang A);
- Kehrmaschine, Kehreinrichtung, Öler, Drahtführungsmaschine (schematische Darstellung in Anhang B);
- Maschine für die Gestaltung von Betten (schematische Darstellung in Anhang C);
- Litzenschub / zugmaschine (schematische Darstellung in Anhang D);
- Kehrmaschine, Extruder, Vibroverteiler (schematische Darstellung in Anhang E);
- Aufroll oder Abrollhaspel (schematische Darstellung in Anhang F);
- Sägemaschine (schematische Darstellung in Anhang G).
ANMERKUNG Die Herstellungsverfahren beinhalten einige oder alle der folgenden:
- Behandeln der Spannbettanlage mit Formtrennmitteln;
- „Markieren“ der zu produzierenden Elemente (Platten, Rohre etc.);
- Transport der vorgespannten Litzen;
- Vorspannen;
- Installieren der Schalungen (Verschalungen; seitliche Schalungen, Endplatten und Einfügungen);
- Einstellen der Bewehrung;
- Spannen;
- Betonverteilung und Vibration;
- Umwickeln der Plane;
- Erhitzen;
- Abspannen;
- Ausleeren der Schalungen, Verschalungen etc.;
- Schneiden oder Sägen der Bewehrungen;
- Ausleeren der Endprodukte;
- Reinigung der Spannbettanlage.
Die Schnittstelle der Betonzufuhr ist bezüglich der Sicherh
Machines pour la fabrication de produits de construction en béton et silico-calcaire - Sécurité - Partie 7: Equipements fixes et mobiles pour la fabrication sur bancs de produits en béton précontraint
La présente partie de l'EN 12629, utilisée avec l'EN 12629-1:2000+A1:2010, s'applique aux équipements
fixes et mobiles pour la fabrication sur bancs de produits en béton précontraint. Le banc de fabrication est une
machine avec laquelle d'autres machines associées fonctionnent simultanément. En outre, ces machines sont
généralement utilisées sur des bancs parallèles.
L'EN 12629-1:2000+A1:2010 spécifie les prescriptions générales applicables aux machines pour la fabrication
de produits de construction en béton et silico-calcaire.
Le présent document spécifie les prescriptions supplémentaires et/ou les dérogations à l’EN 12629-1:2000+A1:2010
spécifiques aux machines concernées."
1.2 La présente norme fournit des exigences particulières relatives à la conception des machines suivantes :
— Banc de précontrainte (représentation schématique donnée à l’Annexe A) ;
— Balayeuse de banc, aspirateur, huileuse, machine à guider les fils (représentation schématique donnée
à l’Annexe B) ;
— Machine à tracer les bancs (représentation schématique donnée à l’Annexe C) ;
— Machine à pousser/tirer les torons ou les fils représentation schématique donnée à l’Annexe D) ;
— Fileuse, extrudeuse, vibrodistributrice (représentation schématique donnée à l’Annexe E) ;
— Machine à dérouler et enrouler les bâches (représentation schématique donnée à l’Annexe F) ;
— Machine à scier (représentation schématique donnée à l’Annexe G).
NOTE La fabrication comprend tout ou partie des opérations suivantes :
— traitement du banc de précontrainte avec un produit de démoulage ;
— traçage des produits (dalles, pré-dalles, etc.) à réaliser ;
— mise en place des torons ou des fils de précontrainte ;
— mise en pré-tension ;
— installation des coffrages (réservations, jouées, intercalaires et inserts) ;
— fixation des armatures ;
Stroji za izdelavo gradbenih proizvodov iz betona in apnenega peščenca - Varnost - 7. del: Nepremična in premična oprema za izdelavo elementov iz prednapetega betona
Ta del EN 12629 skupaj z EN 12629-1:2000+A1:2010 velja za nepremično in premično opremo za izdelavo elementov iz prednapetega betona na delovni mizi. Proizvodni podstavek je stroj, ki hkrati deluje z drugimi povezanimi stroji. Poleg tega se ti stroji v splošnem uporabljajo na vzporedno nameščenih podstavkih. EN 12629-1:2000+A1:2010 določa splošne zahteve, ki veljajo za stroje za izdelavo gradbenih proizvodov iz betona in apnenega peščenca. Ta dokument določa dodatne zahteve in/ali odstopanja od EN 12629-1:2000+A1:2010, specifične za stroje, ki jih zajema. Ta standard navaja posebne zahteve za načrtovanje naslednjih strojev: - podstavek za prednapenjanje (shematski prikaz je podan v Dodatku A); - pometač podstavka, sesalnik, oljnik, stroj za vodenje žice (shematski prikaz je podan v Dodatku B); - stroj za načrtovanje podstavka (shematski prikaz je podan v Dodatku C); - stroj za potiskanje/vlečenje niti (shematski prikaz je podan v Dodatku D); - centrifuga, ekstruder, vibracijski razdeljevalnik (shematski prikaz je podan v Dodatku E); - stroj za razvijanje in navijanje ponjave (shematski prikaz je podan v Dodatku F); - šivalni stroj (shematski prikaz je podan v Dodatku G). Obravnavan je tudi vmesnik za dovajanje betona, ki se upošteva pri varnosti. Zaporedje operacij se lahko razlikuje glede na postopek izdelave, ki se uporablja v tovarni, in glede na različne vrste proizvodov. Pričujoči standard ne zajema dela z narezanimi žicami in njihove namestitve na podstavke. Ta evropski standard obravnava vse pomembne nevarnosti, ki se nanašajo na te stroje, kadar se uporabljajo kot predvideno in pod pogoji napačne uporabe, ki jih razumno predvidi proizvajalec (glej Klavzulo 4). Ta evropski standard določa primerne tehnične ukrepe za odpravo ali zmanjšanje tveganj, ki se pojavijo zaradi pomembnih nevarnosti. Velja podklavzula 1.3 EN 12629-1:2000+A1:2010. Ta dokument velja za opremo za izdelavo elementov iz prednapetega betona, izdelano po datumu, ko je CEN objavil ta dokument.
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.SUHGQDSHWHJDEHWRQDMaschinen für die Herstellung von Bauprodukten aus Beton und Kalksandsteinmassen - Sicherheit - Teil 7: Stationäre und fahrbare Einrichtungen für die Herstellung von SpannbetonelementenMachines pour la fabrication de produits de construction en béton et silico-calcaire - Sécurité - Partie 7: Equipements fixes et mobiles pour la fabrication sur bancs de produits en béton précontraintMachines for the manufacture of constructional products from concrete and calcium-silicate - Safety - Part 7: Stationary and mobile equipment for long line manufacture of prestressed products91.220Gradbena opremaConstruction equipmentICS:Ta slovenski standard je istoveten z:EN 12629-7:2004+A1:2010SIST EN 12629-7:2004+A1:2010en,fr01-december-2010SIST EN 12629-7:2004+A1:2010SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12629-7:2004+A1
September 2010 ICS 91.220 Supersedes EN 12629-7:2004English Version
Machines for the manufacture of constructional products from concrete and calcium-silicate - Safety - Part 7: Stationary and mobile equipment for long line manufacture of prestressed products
Machines pour la fabrication de produits de construction en béton et silico-calcaire - Sécurité - Partie 7: Equipements fixes et mobiles pour la fabrication sur bancs de produits en béton précontraint
Maschinen für die Herstellung von Bauprodukten aus Beton und Kalksandsteinmassen - Sicherheit - Teil 7: Stationäre und fahrbare Einrichtungen für die Herstellung von Spannbetonelementen This European Standard was approved by CEN on 3 November 2003 and includes Amendment 1 approved by CEN on 5 August 2010.
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, Croatia, 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:
Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12629-7:2004+A1:2010: ESIST EN 12629-7:2004+A1:2010
Pre-stressing bed . 69Annex B (informative)
Bed sweeper, vacuum cleaner, oiler, wire-guide machine . 74Annex C (informative)
Bed layout machine . 76Annex D (informative)
Strand pushing/pulling machine . 78Annex E (informative)
Spinner, extruder, vibrodistributor . 80Annex F (informative)
Tarpaulin paying out and winding in machine . 82Annex G (informative)
Sawing machine . 84Annex H (informative)
Trilingual list of terms relative to pre-stressing manufacturing products and equipment . 86Annex ZA (informative)
!!!!Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC"""" . 88
!EN 12629-1:2000+A1:2010" specific for the Stationary and mobile equipment for long line manufacture of pre-stressed products as defined in clause 3.
With the aim of clarifying the intentions of the standard it should be noticed that the following assumptions where made when producing it: specific conditions of use or environmental conditions out of the scope of the standard shall be the subject of negotiations between the manufacturer and the user/owner; the equipment will only be used by competent and designated persons; the place of use/installation is adequately lit; All operations are carried out by specially trained operators. SIST EN 12629-7:2004+A1:2010
EN 12629-1:2000+A1:2010 and the following apply." 3.1 Products 3.1.1 hollow core flooring slab pre-stressed slabs incorporating longitudinal hole used in the construction of floors. They are considered as structural elements 3.1.2 beam pre-stressed concrete element used in building or bridge structures. It has a supporting function; their section can be that of an I, T, Y, U, Π, a rectangle, a trapezium, etc. 3.1.3 joist pre-stressed concrete element forming the supporting part of complex flooring. Its inverted T-shape section provides a support for inflll blocks or slabs and in-situ concrete screed (compression slab) 3.1.4 lintel part constructed of pre-stressed concrete, prismatic in shape with a generally rectangular section. It forms the top part of openings in walls and ensure support for masonry mounted above 3.1.5 plain slab thin pre-stressed concrete elements designed to form the reinforced section of complex flooring. The compression slab is cast in situ 3.1.6 transmission line pole pre-stressed concrete post designed to support overhead electric energy or communication cables SIST EN 12629-7:2004+A1:2010
machines for the long line manufacture of pre-stressed hollow core flooring slab manufacturing workshop plain slabs
Hall floor joists In addition, annex H (informative) gives a trilingual list of terms relative to pre-stressing manufacturing products and equipment. 3.2.1 pre-stressing bed
3.2.1.1 pre-stressing bed for flat products installation composed of two solid anchor blocks, and a slab connecting the two anchor blocs. The bed may incorporate a steel plate soffit on which concrete products (pre-slabs, joists, hollow slabs) are cast. At the ends of the bed, the blocks are provided with posts and anchor plates (abutment). Jacking devices allow tensioning and detensioning of wires or strands. NOTE 1 The length of the slab is generally between 40 m and 150 m and the width is between 1,20 m and 2,40 m.
NOTE 2 The pre-stressing bed used for the manufacture of flat products is usually completed by rails arranged on both sides of the slab. The rails are intended to guide mobile machines." 3.2.1.2 pre-stressing bed for beam type products
installation composed of two solid anchor blocks, a slab connecting the two anchor blocs and two walls, generally movable. At the ends of the bed, the blocks are provided with posts and anchor plates (abutment). Jacking devices allow tensioning and detensioning of wires or strands. NOTE 1 The length of the bed is generally between 80 m and 100 m and the width is between 0,50 m and 2 m.
NOTE 2 The beds may be single or double (parallel casting of two beams). 3.2.2 self stressing bed structure enclosing or supporting shutterings and simply resting on the ground or on suitable supports. The length of this structure is between several meters (depending on the manufactured products) and a maximum size compatible with the overall stability and the forces developed by the tension in the strands 3.2.3 heating equipment equipment intended to harden the products NOTE heating equipment includes: a type of energy sources from: electricity; "free" steam; steam or hot fluids in a closed circuit; hot air and a heating system from: heating soffits or heating elements under moulds or shuttering; electric heating cable integrated into the bed; SIST EN 12629-7:2004+A1:2010
The strands are then pulled on the bed 3.2.6.6 strands setting up machine independent or towed mobile carriages used for positioning the pre-stressing strands on the bed. These strands are generally stored in coils or are pre-cut. Some similar machines can set down or fix the passive transverse reinforcement. This equipment is more specifically used in the manufacture of plain slabs 3.2.6.7 tarpaulin paying out machine independent or towed mobile carriage carrying a tarpaulin pay out drum. For movement in a given direction, the tarpaulin is rolled out over the product to be heated; for a movement in the opposite direction, it is wound in and thus uncovers the hardened products. These operations can be mechanised or manual 3.2.6.8 bed sawing machine independent or towed mobile carriage which includes a concrete or strand sawing. Depending upon its orientation, sawing can be longitudinal, transverse or angled. Some of the carriages can be programmed to automatically execute all the cuts for a bed 3.2.6.9 concrete vacuum machines independent or towed mobile carriage which includes a vacuum device to remove green concrete spillage
(between two products) SIST EN 12629-7:2004+A1:2010
during tensioning 6 1.3 Cutting sharp edges in beds and casing 7 1.4 Drawing-in or trapping
strands (wire or bundles) under tension (failure of the anchoring, slippage of the locking device) 8 by strands (wire or bundles) during setting up 9 1.5 Impact strands (wire or bundles) under tension (failure of the anchoring, slippage of the locking device) 8 by strands (wire or bundles) during setting up 9 chain or guard ejection due to rupture of strands (wire or bundles)
2 falling of the end bed mobile guard (mobile cover, shield, grid) 10 falling of accessories (combs, inserts, layout of product sides and ends) during mechanical or manual handling operations 8 rupture of a transverse anchor 4 1.6 Ejection of fluids under pressure hoses under hydraulic pressure, hot fluids of the hydraulic circuits, feeding of the cylinders for tensioning of reinforcements 11 steam pipes, valves: breaking, leakage 12 1.7 Ejection of parts chain or guard ejection due to rupture of strands (wire or bundles) 2 rupture of the pneumatic rope of the bed vibrator 13 1.8 Slip, trip and falling
oiled beds (walking on the beds after spraying of the releasing agents) 8 rails on both sides of the bed that constitute obstacles for the passage and falling from a height 14 machine ends, hydraulic pipes on the ground 14 falling into the tensioning hole 15 falling from/into the casing (assembly of the reinforcements, concrete smoothing…) 5 2 Electrical hazard 2.1 Electrical contacts (direct or indirect) motor, branch boxes, electrical resistances under the beds, plugs 13-16 3 Thermal hazards 3.1 Burns heat radiation from the bed (heating of the beds): feet burns 8 steam pipes (location, isolation, leakage) 8-12 4 Hazards generated by noise 4.1 Hearing losses (deafness) hydraulic groups of the tensioning cylinders of strands (wire or strands) 16 fix and mobile vibrators on vibratory bed, poker vibrator 13 SIST EN 12629-7:2004+A1:2010
releasing and hydraulic oil 8-13-16 electrical groups (hydraulic group, control of the heating of the beds) 13-16 cleaning products of the transverse anchor 4 6.4 Perforation, puncture Ends of strands (breaking of reinforcement or button-holding, or button-heads slipping in the anchors) 4 transverse anchor disengagement after cutting of the steel 4 breaking of the strand or wire (damaged
wires or short length) 8-3 7 Hazards generated by neglecting ergonomic principles in machine design 7.1 Unhealthy postures location of the tensioning and tension relieving equipment for single strand compared to the tensioned wires and to the manometer 16 location of the controls of the hydraulic equipment compared to the bed 16 access to the tensioning holes 15 7.2 Excessive efforts tensioning by single wire cylinder (height, support of the single wire stressing jack) 3 7.3 Inadequacy with human anatomy low position of the beds and height of the casings during manufacturing, cleaning and handling operations (curved back or tilted in the casing) 8-13 lack of opening of the beds to facilitate the reinforcements mounting (posts, beams) 13 7.4 Neglecting use of personal protective equipment lack of advice, written instructions, PPE adapted to human (glasses, gloves, sound protection) 3-8-13 initial training of the personnel 2-9 7.6 Human error not respecting the order of tensioning the wires (breaking risks) 3 non-stop of the tensioning at the indications provided on the bed or on the manometer (breaking of the steels and of the equipment) 8 additional traction on the strand (several tensioning strokes with the single wire stressing jack)= risk of breaking of the wire 3 assembling of the pins (mixing of new, old, different… parts), forget to clean and to check 4 8 Hazards generated by failure of energy and other malfunctions 8.1 Failure of control system failure of the hydraulic balancing of the multi-strand tensioning cylinders: mechanical break 1 8.2 Errors of fitting inverting the tensioning equipment hydraulic ropes 11 SIST EN 12629-7:2004+A1:2010
4 1.8 Slip, trip and falling checking/filling of the oil tank 9 access at a height during hooking and unhooking of the machine to change its bed 2-4 connection of the machine to the aerial electrical power line (mobile stick) 14 falling at descending from the passage/stair 2
simultaneous presence of oil and electricity 9-10 7 Hazards generated by neglecting ergonomic principles in machine design 7.1 Unhealthy postures handling of the machine from one bed to an other 4 location of the machine actuators and limited field of vision and inadequate position of the driver 2 access to the machine controls for cleaning and maintenance 5-6 7.2 Excessive efforts change of manufacturing, adjustments, machine parts or tools' handling, (sweeper) 5-6 7.3 Inadequacy with human anatomy access to a height when lifting up and down the machine to change its way 2-4 driving hampered by a lack of visibility from the operator's position 2 inadequacy of the driver support (seat, feet support, setting…) 2 7.4 Neglecting use of personal protective equipment absence of advice, written instructions, PPE in inadequacy with the human body (glasses and vapour, gloves, ear protectors, dust mask and oils) 2 initial training of the personnel 2 7.6 Human error non stop of the machine at the end of the bed or in front of an obstacle (person, machine) 1-7-2 derailment when transferring (risk of machine fall) 4 8 Hazards generated by failure of energy and other malfunctions 8.1 Failure of control system falling of the sweepers supports 5 8.2 Errors of fitting unintended start up (sweeper) 2-5 8.3 Errors of mounting installation and setting of oil spraying nozzles 12 SIST EN 12629-7:2004+A1:2010
connection of the machine to the aerial power line (movable stick) 7 2 Electrical hazards 2.1 Electrical contacts (direct or indirect) motor, derivation boxes, protruding plugs, panels, electrical boxes, batteries 8
electrical power source by collector wires and/or stick or cable drum on soil or rubbing against mobile parts (insulation, position, connection, wear, cutting) or batteries 7-8-9
presence of water 1 3 Thermal hazard 3.1 Burns, explosion batteries 9 6 Hazards generated by materials and products 6.2 Contact with harmful products paint that serves to layout 4 6.4 Perforation, puncture by the moving layout head 4 SIST EN 12629-7:2004+A1:2010
6 1.4 Drawing-in or trapping
by wire-guiding, laying out and pulling rollers 4 by roping of the wires during distribution 1 by rotation of the drums 1 1.5 Impact with the strand pulling carriage 7 by the end of a bobbin (whipping of the free wire end) 1 with the rotation of the drums 1 1.6 Ejection of fluids under pressure hydraulic ropes of the cylinders and of the hydraulic group: break, leakage 8 1.7 Ejection of parts breaking of the pulling carriage wire, during the machine operation 9 1.8 Slip, trip and falling
on the remaining oil on soil 10 SIST EN 12629-7:2004+A1:2010
simultaneous presence of oil and electricity 8 - 12 6.4 Perforation, puncture by cut wires and strips
1 7 Hazards generated by neglecting ergonomic principles in machine design 7.1 Unhealthy postures location of the machine actuators and their relating operation 12 access to the machine parts for cleaning and maintenance 3-4 7.2 Excessive efforts manual pressurisation on the mechanical devices for locking the pulling wires 4 changing of manufacturing, adjustments, handling of parts or tools 4 7.3 Inadequacy with human anatomy fall into the wire-guide delivery pit
2 7.4 Neglecting use of personal protective equipment absence of advice, written instructions, PPE in inadequacy with the human body (glasses and vapour, gloves, ear protectors, dust mask and oils) 4 initial training of the personnel 4 7.5 Inadequate local lighting constraining location (shadow, dazzling, insufficient lighting) 4 7.6 Human error Inadequate layout of actuators, inconsistency between the direction of the actuators’ operation and the direction of the mobile parts 12 8 Hazards generated by failure of energy and other malfunctions 8.2 Failure of control system unintended start up (rollers, cutting) 12 8.3 Errors of mounting changing of manufacturing, adjustments 4 9 Hazards generated by temporary missing or incorrect positioning of safety related equipment 9.1 All kinds of guards after maintenance and/or cleaning operation 4 controls insufficient emergency stop device taking into account the length of the guiding beam
12 uncont
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