SIST EN 12629-7:2004
(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
This European Standard is intended to be used together with EN 12629-1:2000 "Machines for the manufacture of constructional products from concrete and calcium-silicate - Safety - Part 1: Common requirements", which specifies general requirements of machines for the manufacture of constructional products from concrete and calcium-silicate.
The manufacturing bed is a machine with which other associated machines work simultaneously. Moreover, these machines are generally used on beds installed in parallel.
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
Diese Europäische Norm gilt für Einrichtungen zur Herstellung von Spannbeton, die sich aus stationären und fahrbaren Ausrüstungen zusammensetzen, um Produkte herzustellen, wie z.B.: - Abfangträger, Tragbalken und Brückenträger etc.; - Stürze; - Bodenplatten; - gerippte Böden; - Träger für Frei- leitungen; - Lichtmaste; - Schwellen; - Hohlkernplatten.
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
1.1 La présente Norme européenne est destinée a etre utilisée conjointement a l'EN 12629-1»Machines pour la fabrication de produits de construction en béton et silico-calcaire - Sécurité - Partie 1 : Exigences communes" qui spécifie des exigences générales relatives aux machines pour la fabrication de produits de construction en béton et silico-calcaire.
Le banc de fabrication est une machine qui fonctionne simultanément avec d'autres machines associées. Par ailleurs, ces machines sont généralement utilisées sur des bancs installés en parallele.
1.2 La présente norme fournit des exigences particulieres relatives a la conception des machines suivantes :
- Banc de précontrainte (représentation schématique donnée a l'annexe A) ;
- Balayeuse de banc, aspirateur, huileuse, machine a guider les fils (représentation schématique donnée a l'annexe B) ;
- Machine a tracer les bancs (représentation schématique donnée a l'annexe C) ;
- Machine a pousser/tirer les torons ou les fils représentation schématique donnée a l'annexe D) ;
- Fileuse, extrudeuse, vibrodistributrice (représentation schématique donnée a l'annexe E) ;
- Machine a dérouler et enrouler les bâches (représentation schématique donnée a l'annexe F) ;
- Machine a scier (représentation schématique donnée a 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.) a 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 ;
- mise en tension des torons ou des fils de précontrainte ;
- coulage du béton et compaction ;
- déroulement de la bâche d'étuvage ;
- étuvage ;
- mise endétension des torons ou fils de précontrainte ;
- démoulage, des produits et enlevement des réservations, intercalaires, etc. ;
Stroji za izdelavo gradbenih proizvodov iz betona in apnenega peščenca - Varnost - 7. del: Nepremična in premična oprema za izdelavo elementov iz prednapetega betona
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 12629-7:2004
01-september-2004
6WURML]DL]GHODYRJUDGEHQLKSURL]YRGRYL]EHWRQDLQDSQHQHJDSHãþHQFD9DUQRVW
GHO 1HSUHPLþQDLQSUHPLþQDRSUHPD]DL]GHODYRHOHPHQWRYL]SUHGQDSHWHJD
EHWRQD
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
Maschinen für die Herstellung von Bauprodukten aus Beton und Kalksandsteinmassen -
Sicherheit - Teil 7: Stationäre und fahrbare Einrichtungen für die Herstellung von
Spannbetonelementen
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
Ta slovenski standard je istoveten z: EN 12629-7:2004
ICS:
91.220 Gradbena oprema Construction equipment
SIST EN 12629-7:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
EN 12629-7
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2004
ICS 91.220
English 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 Maschinen für die Herstellung von Bauprodukten aus Beton
béton et silico-calcaire - Sécurité - Partie 7: Equipements und Kalksandsteinmassen - Sicherheit - Teil 7: Stationäre
fixes et mobiles pour la fabrication sur bancs de produits en und fahrbare Einrichtungen für die Herstellung von
béton précontraint Spannbetonelementen
This European Standard was approved by CEN on 3 November 2003.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, 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
© 2004 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12629-7:2004: E
worldwide for CEN national Members.
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EN 12629-7:2004 (E)
Contents
page
Foreword. 3
Introduction . 4
1 Scope . 5
2 Normative references . 6
3 Terms and definitions. 7
3.1 Products. 7
3.2 Equipment. 8
4 List of significant hazards. 10
5 Safety requirements and/or measures. 26
5.1 Layout - Circulation - Means of access . 26
5.2 Control of the machines, modes of operation . 26
5.3 Safety of machines and working equipment - General. 27
5.4 Noise and vibration. 27
5.5 Additional requirements for specific machines and equipment. 28
5.6 Summary of the safety measures given in relation to the significant hazards listed in clause 434
6 Verification of the requirements and/or measures. 65
7 Information for use – Instruction handbook . 66
7.1 Introduction . 66
7.2 General information. 66
7.3 Minimum recommendations for use of the machines. 67
8 Marking . 68
Annex A (informative) Pre-stressing bed. 69
Annex B (informative) Bed sweeper, vacuum cleaner, oiler, wire-guide machine . 74
Annex C (informative) Bed layout machine . 76
Annex D (informative) Strand pushing/pulling machine . 78
Annex E (informative) Spinner, extruder, vibrodistributor. 80
Annex F (informative) Tarpaulin paying out and winding in machine . 82
Annex G (informative) Sawing machine. 84
Annex H (informative) Trilingual list of terms relative to pre-stressing manufacturing products and
equipment . 86
Annex ZA (informative) Relationship of this document with EC Directives. 88
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EN 12629-7:2004 (E)
Foreword
This document (EN 12629-7:2004) 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 August 2004, and conflicting national standards shall be withdrawn at the latest by
August 2004.
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.
Annexes A, B, C, D, E, F, G and H are informative.
The series "Machines for the manufacture of constructional products from concrete and calcium-silicate — Safety"
consists of following parts:
Part 1: Common requirements;
Part 2: Block making machines;
Part 3: Slide and turntable machines;
Part 4: Concrete rooftile making machines;
Part 5: Pipe making machines;
Part 6: Stationary and mobile equipment for the manufacture of precast reinforced products;
Part 7: Stationary and mobile equipment for long line manufacture of pre-stressed products;
Part 8: Machines and equipment for the manufacture of constructional products from calcium silicate (and
concrete).
This document is complementary to part 1 and is intended to be used in combination with that part.
Annex A is informative and contains “Pre-stressing bed”, annex B is informative and contains “Bed sweeper,
vacuum cleaner, oiler, wire-guide machine”, annex C is informative and contains “Bed layout machine”, annex D is
informative and contains “Strand pushing/pulling machine”, annex E is informative and contains “Vibrodistributor,
spinner, extruder”, annex F is informative and contains “Tarpaulin paying out and winding in machine”, annex G is
informative and contains “Sawing machine”.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,
Slovakia, Spain, Sweden, Switzerland and the United Kingdom.
3
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EN 12629-7:2004 (E)
Introduction
This European Standard is a Type C standard as stated in EN 1070.
The machinery concerned and the extent to which hazards, hazardous situations and events are covered are
indicated in the scope of this European 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 machines that
have been designed and built according to the provisions of this type C standard.
This European Standard specifies the additional requirements to and/or the deviations from EN 12629-1 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.
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EN 12629-7:2004 (E)
1 Scope
1.1 This European Standard is intended to be used together with EN 12629-1 “Machines for the manufacture of
constructional products from concrete and calcium-silicate — Safety — Part 1: Common requirements", which
specifies general requirements of machines for the manufacture of constructional products from concrete and
calcium-silicate.
The manufacturing bed is a machine with which other associated machines work simultaneously. Moreover, these
machines are generally used on beds installed in parallel.
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.
The sequence of these operations can be different according to the manufacturing process used in the factory and
to the various types of products.
1.3 This European Standard deals with the significant hazards pertinent to these machines, when they are used
as intended under the conditions foreseen by the manufacturer (see clause 4), except noise hazards which are
partly dealt with and hazards due to handling the package of cut wires and placing them on beds.
NOTE Amendment is under preparation to deal with noise, in particular for measures to reduce noise at source and a noise
test code including noise declaration.
This European Standard specifies the appropriate technical measures to eliminate or reduce risks arising from the
significant hazards.
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EN 12629-7:2004 (E)
1.4 Sub-clause 1.3 of EN 12629-1:2000 applies.
1.5 Sub-clause 1.4 of EN 12629-1:2000 applies.
NOTE At the designing stage, in complement to this standard, other type C standards dealing with similar hazards can be
used for some of the machines and equipment mentioned in this standard. EN 13862 for Floor sawing machines or EN 1454 on
portable saws can be a help to design the saws described in this standard.
1.6 This document is applicable to equipment for long-line manufacture of pre-stressed product which are
manufactured after the date of publication of this document by CEN.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
EN 294, Safety of machinery — Safety distances to prevent danger zones being reached by the upper limbs.
EN 349:1993, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body.
EN 457, Safety of machinery — Auditory danger signals — General requirements, design and testing (ISO
7731:1986, modified).
EN 811:1996, Safety of machinery — Safety distances to prevent danger zones being reached by the lower limbs.
EN 842, Safety of machinery —Visual danger signals — General requirements, design and testing.
EN 953:1997, Safety of machinery — Guards — General requirements for the design and construction of fixed and
movable guards.
EN 954-1:1996, Safety of machinery — Safety-related parts of control systems — Part 1: General principles for
design.
EN 982, Safety of machinery — Safety requirements for fluid power systems and their components — Hydraulics.
EN 1050:1996, Safety of machinery — Principles for risk assessment.
EN 1070;1998, Safety of machinery — Terminology.
EN 1088, Safety of machinery — Interlocking devices associated with guards — Principles for design and
selection.
EN 1760-2, Safety of machinery — Pressure sensitive protective devices — Part 2: General principles for the
design and testing of pressure sensitive edges and pressure sensitive bars.
EN 13862:2001, Floor cutting-off machines — Safety.
EN 12629-1:2000, Machines for the manufacture of constructional products from concrete and calcium-silicate —
Safety — Part 1: Common requirements.
EN 60204-1, Safety of machinery — Electrical equipment of machines — Part 1: General requirements (IEC
60204-1:1997).
EN 60529, Degrees of protection provided by enclosures (IP Code) (IEC 60526:1989).
EN ISO 14122-1, Safety of machinery — Permanent means of access to machinery — Part 1: Choice of a fixed
means of access between two levels (ISO 14122-1:2001).
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EN 12629-7:2004 (E)
EN ISO 14122-2:2001, Safety of machinery — Permanent means of access to machinery — Part 2: Working
platforms and gangways (ISO 14122-2:2001).
EN ISO 14122-3, Safety of machinery — Permanent means of access to machinery — Part 3: Stairways,
stepladders and guard-rails (ISO 14122-3:2001).
prEN ISO 14122-4, Safety of machinery — Permanent means of access to machinery — Part 4: Fixed ladders
(ISO/FDIS 14122-4:2002).
3 Terms and definitions
For the purposes of this European Standard, the terms and definitions given in EN 1070:1998 and EN 12629-
1:2000apply.
Additional definitions specifically needed for this European Standard are added below:
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, P 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
3.1.7
lighting column
rectilinear pre-stressed concrete post, designed to support public lighting (streets, parks, sports grounds, etc.)
3.1.8
railway sleeper
trapezium-shaped element of pre-stressed concrete designed to support the rails and maintain them at the required
gauge
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EN 12629-7:2004 (E)
3.2 Equipment
NOTE There is no customary term for the machines dealt with in this standard. The term featured in the title is merely one
of the more frequent terms, but other equivalent terms may be encountered, each combining the words in the following lists in a
variety of ways:
production machines hollow core flooring slab
for the long line
workshop pre-stressed plain slabs
manufacture of
manufacturing
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;
heated tarpaulin;
heated shuttering or mould.
3.2.4
tensioning and tension relieving equipment
3.2.4.1
single strand tensioning
equipment consisting of a jacking device and its associated hydraulic machine (which is generally mobile) which
supplies the energy needed to tension the strands: wire or strands. The jacking device takes its support on the
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EN 12629-7:2004 (E)
anchorage utilising a barrel and conical wedge ensuring the restraint of pre-stressed reinforcement. The strands
are anchored on the anchorage abutment
3.2.4.2
multi-strand tensioning
equipment allowing the simultaneous tensioning of all the strands on one bed. The anchor points in the transverse
anchor are obtained by anchor grips or button-heads; the button-heads are made by cold forming the wire ends.
The pre-stressing bed has a transverse anchor at either end. At one end, the transverse anchor is fixed and at the
other is mobile and moved by hydraulic cylinders. A fixed hydraulic machine supplies the necessary energy.
After tensioning, the cylinders are locked in position by a mechanical device (support, auger) so that they do not
stay under pressure during the following operations
3.2.4.3
detensioning
operation where, at first, the jacking devices are put under pressure slightly above the tensioning pressure to
release the locking device (screw, support, etc.). Then, they act as a brake to release the tension in the strands
(progressive release).
In the case of wide beds or asymmetry in the forces in the strands, a guiding and balancing device can be set up
3.2.5
concrete casting machines
3.2.5.1
vibrodistributor
independent mobile machine providing the uniform distribution of concrete (in general for the manufacture of plain
slabs or joists) compacting and controlling the concrete thickness by means of vibration.
Generally, vibrodistributors incorporate auxiliary systems that allow to carry out the roughness of the upper face for
plain slabs
3.2.5.2
sheer compactor and extruder
mobile automatic machine that distributes the concrete while forming (generally for the manufacture of hollow core
flooring slabs and joists), compacting and finishing the product. These operations are generally carried out using
the principle of a vibrating and sliding core.
The machine can be moved under its own power (sheer compactor) or by reaction due to the thrust against the
concrete applied during the feed (sheer compaction)
3.2.6
auxiliary machines
3.2.6.1
bed cleaning machine
independent moving carriage assemblies, towed or self-propelled to ensure:
the sweeping the soffit or moulds;
the removal of hardened concrete;
the spraying of release agents onto the soffit or moulds.
In some cases, they locate the pre-stressing strands.
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EN 12629-7:2004 (E)
3.2.6.2
marking out machine
independent machine consisting of self-propelled mobile carriages designed to ensure the layout of product in
terms of dimension and shape. Generally they are used for the manufacture of floor shuttering slabs
3.2.6.3
machine for laying and removing block ends
independent towed or self-propelled mobile carriage machines to handle, store, install and remove inserts (also
called combs) to install and remove them. These machines are used to manufacture the floor joist and plain slabs.
They ensure their set up and their withdrawal
3.2.6.4
strand pulling machine
self-propelled carriages, or machines propelled by other means, travelling sidewise or over the bed and, in their
movements, pulling one or several strands in such a fashion as to cut them to length.
The strands are available in coils. They are held in dispensers or turntables
3.2.6.5
strand pushing machine
machine situated on the side of the beds and pushing each strand in a casing all along the beds, cutting them
automatically to the desired length. When the desired number of strands has been cut, the casing opens and
releases the strands on the side of the bed.
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 ist 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)
4 List of significant hazards
This clause contains the hazards, hazardous situations, 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 risk.
Before using this standard, it is important for the manufacturer to carry out a risk assessment of the various
machines which are covered by this standard to check that they have the hazards identified in this clause.
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EN 12629-7:2004 (E)
Annexes A to G (informative) illustrate examples of the following common machine types:
pre-stressing bed, strands setting up machine, fixed or mobile tensioning equipment and self stressing bed;
sweeper/vacuum machine/oiler;
bed layout machine;
strand pulling/pushing machine;
sheer compactor, extruder, vibrodistributor;
tarpaulin paying out and winding in machine;
strand and concrete sawing machine.
In accordance with clause 4 of EN 12629-1:2000 the hazard zones described in the following tables are illustrated
in annexes A to G.
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EN 12629-7:2004 (E)
Table 1 — Pre-stressing bed, strands setting up machine, fixed or mobile tensioning equipment and self
stressing bed
Hazard according to
See Figures
Ref annex A of Localisation/scenario
A.1 and A.3
EN 1050:1996
1 Mechanical hazards
1.1 Crushing detensioning cylinders, jacking devices releasing 1
falling of the single wire stressing jack 3
1.2 Shearing between button-heads and transverse anchor (during pre-
4
tensioning)
with the bed accessories (removable walls, mobile vibrator) 5
with the mobile part of the single wire stressing jack during
6
tensioning
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
8
anchoring, slippage of the locking device)
by strands (wire or bundles) during setting up 9
1.5 Impact strands (wire or bundles) under tension (failure of the
8
anchoring, slippage of the locking device)
by strands (wire or bundles) during setting up 9
chain or guard ejection due to rupture of strands (wire or
2
bundles)
falling of the end bed mobile guard (mobile cover, shield, grid) 10
falling of accessories (combs, inserts, layout of product sides
8
and ends) during mechanical or manual handling operations
rupture of a transverse anchor 4
1.6 Ejection of fluids under hoses under hydraulic pressure, hot fluids of the hydraulic
pressure circuits, feeding of the cylinders for tensioning of 11
reinforcements
steam pipes, valves: breaking, leakage 12
1.7 Ejection of parts chain or guard ejection due to rupture of strands (wire or
2
bundles)
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
8
agents)
rails on both sides of the bed that constitute obstacles for the
14
passage and falling from a height
machine ends, hydraulic pipes on the ground 14
falling into the tensioning hole 15
falling from/into the casing (assembly of the re
...
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