Machines for mechanical processing of minerals and similar solid materials - Safety - Part 4: Specific requirements for screening machinery

This part of prEN 1009, to be used together with prEN 1009-1, specifies the safety requirements and their verification for the design and construction of screening machinery for the mechanical processing in quarrying, recycling and processing mineral and by-products as defined in 3.1.
In addition, it specifies the type of information on safe working practices (including residual risks) to be provided by the manufacturer.
When requirements of this part of prEN 1009 are different from those which are stated in prEN 1009-1, the requirements of this part of prEN 1009 take precedence over the requirements of prEN 1009-1 for machines that have been designed and built according to the provisions of this part of prEN 1009.
This part of prEN 1009, together with prEN 1009-1, deals with all the significant hazards, hazardous situations and events relevant to screening machinery when they are used as intended and under the conditions foreseen by the manufacturer (see Clause 4).
NOTE 1   EN 13309 specifies test methods and acceptance criteria for evaluating the electromagnetic compatibility of all kind of mobile construction machinery.
NOTE 2   Specific requirements related to road traffic regulations (e.g. lighting, dimensions, speed limit plate) are not taken into account in this standard.
This document is not applicable to screening machinery which are manufactured before the date of publication of this document by CEN.

Maschinen für die mechanische Aufbereitung von Mineralien und ähnlichen festen Stoffen - Sicherheit - Teil 4: Spezifische Anforderungen für Klassiermaschinen (Siebmaschinen)

Dieser Teil der prEN 1009, der zusammen mit prEN 1009-1 anzuwenden ist, legt die Sicherheitsanforderungen und ihre Überprüfung für die Auslegung und Konstruktion von Klassiermaschinen (Siebmaschinen) zur mechanischen Aufbereitung im Sinne von Abbau, Recycling und Aufbereitung von Mineralien und Nebenprodukten nach Definition in 3.1 fest.
Zusätzlich spezifiziert er, welche Informationen zum sicheren Betrieb (einschließlich Restgefahren) vom Hersteller zur Verfügung zu stellen sind.
Wenn Anforderungen dieses Teils der prEN 1009 von in prEN 1009-1 beschriebenen abweichen, haben die Anforderungen dieses Teils der prEN 1009 für Maschinen, die entsprechend den Anforderungen dieses Teils der prEN 1009 ausgelegt und konstruiert wurden, Vorrang vor den Anforderungen von prEN 1009-1.
Dieser Teil der prEN 1009 befasst sich zusammen mit prEN 1009-1 mit allen signifikanten Gefährdungen, Gefährdungssituationen und -ereignissen, die für Klassiermaschinen gelten, wenn sie bestimmungsgemäß und unter den vom Hersteller vorhersehbaren Bedingungen verwendet werden (siehe Abschnitt 4).
ANMERKUNG 1   EN 13309 legt Prüfverfahren und Abnahmekriterien zur Bewertung der elektromagnetischen Verträglichkeit für alle Arten mobiler Baumaschinen fest.
ANMERKUNG 2   Spezifische Anforderungen im Hinblick auf Straßenverkehrsvorschriften (z. B. Beleuchtung, Maße, Geschwindigkeitsanforderungen, Kennzeichen) werden in dieser Norm nicht berücksichtigt.
Dieses Dokument gilt nicht für Klassiermaschinen (Siebmaschinen), die vor dem Datum der Veröffentlichung dieses Dokuments durch CEN hergestellt wurden.

Machines pour le traitement mécanique des minéraux et des matériaux solides similaires - Sécurité - Partie 4 : Prescriptions spécifiques pour machines de criblage

La présente partie du prEN 1009, à utiliser conjointement avec le prEN 1009-1, spécifie les exigences de sécurité et leur vérification pour la conception et la construction de machines de criblage pour traitement mécanique pour l'extraction, le recyclage et le traitement des minéraux et sous-produits tel que défini en 3.1.
En outre, la présente Norme européenne spécifie le type d'informations que le fabricant doit fournir sur les pratiques d'utilisation sûre (incluant les risques résiduels).
Lorsque des exigences de la présente partie du prEN 1009 diffèrent de celles spécifiées dans le prEN 1009-1, les exigences de la présente partie du prEN 1009 prévalent sur les exigences du prEN 1009-1 pour les machines conçues et fabriquées conformément aux dispositions de la présente partie du prEN 1009.
La présente partie du prEN 1009, utilisée conjointement avec le prEN 1009-1, traite de tous les phénomènes dangereux et situations et événements dangereux significatifs inhérents aux machines de criblage dans le cadre d'une utilisation normale et des conditions prévues par le fabricant (voir l'Article 4).
NOTE 1   L'EN 13309 spécifie des méthodes d'essai et des critères d'acceptation pour l'évaluation de la compatibilité électromagnétique de tous les types de machines mobiles pour la construction.
NOTE 2   Les exigences spécifiques aux réglementations routières (par exemple, éclairage, dimensions, plaque de limitation de vitesse) ne sont pas prises en compte dans la présente norme.
Le présent document ne s'applique pas aux machines fabriquées avant sa date de publication par le CEN.

Stroji za mehansko obdelavo mineralov in podobnih trdnih snovi - Varnost - 4. del: Posebne zahteve za presejalne stroje

General Information

Status
Published
Public Enquiry End Date
17-Jan-2018
Publication Date
07-Jun-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
04-Jun-2020
Due Date
09-Aug-2020
Completion Date
08-Jun-2020

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SLOVENSKI STANDARD
SIST EN 1009-4:2020
01-september-2020

Stroji za mehansko obdelavo mineralov in podobnih trdnih snovi - Varnost - 4. del:

Posebne zahteve za presejalne stroje

Machines for mechanical processing of minerals and similar solid materials - Safety -

Part 4: Specific requirements for screening machinery
Maschinen für die mechanische Aufbereitung von Mineralien und ähnlichen festen
Stoffen - Sicherheit - Teil 4: Spezifische Anforderungen für Klassiermaschinen
(Siebmaschinen)

Machines pour le traitement mécanique des minéraux et des matériaux solides similaires

- Sécurité - Partie 4 : Prescriptions spécifiques pour machines de criblage
Ta slovenski standard je istoveten z: EN 1009-4:2020
ICS:
13.110 Varnost strojev Safety of machinery
73.120 Oprema za predelavo rudnin Equipment for processing of
minerals
91.220 Gradbena oprema Construction equipment
SIST EN 1009-4:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 1009-4:2020
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SIST EN 1009-4:2020
EN 1009-4
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2020
EUROPÄISCHE NORM
ICS 73.120; 91.220
English Version
Machines for mechanical processing of minerals and
similar solid materials - Safety - Part 4: Specific
requirements for screening machinery

Machines pour le traitement mécanique des minéraux Maschinen für die mechanische Aufbereitung von

et des matériaux solides similaires - Sécurité - Partie 4 : Mineralien und ähnlichen festen Stoffen - Sicherheit -

Prescriptions spécifiques pour machines de criblage Teil 4: Spezifische Anforderungen für

Klassiermaschinen (Siebmaschinen)
This European Standard was approved by CEN on 13 April 2020.

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

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1009-4:2020 E

worldwide for CEN national Members.
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SIST EN 1009-4:2020
EN 1009-4:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Introduction .................................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions ................................................................................................................................... 6

4 Safety requirements and/or protective/risk reduction measures ............................................... 7

4.1 General ................................................................................................................................................................ 7

4.2 Ergonomics requirements for screening machines maintenance ................................................. 8

4.3 Screen equipment (cross tensioned screening panels, sheets, blocks and other wear

parts) ................................................................................................................................................................ 20

5 Verification of safety requirements and/or protective/risk reduction measures .............. 21

6 Information for use ..................................................................................................................................... 23

6.1 General ............................................................................................................................................................. 23

6.2 Signals and warning devices .................................................................................................................... 23

6.3 Instruction handbook ................................................................................................................................. 23

Annex A (informative) Example of screening machinery ........................................................................... 24

Annex B (informative) Trilingual terminology of screening machinery............................................... 27

Annex C (informative) Calculation of the access dimensions .................................................................... 28

Annex D (informative) List of significant hazards ......................................................................................... 31

Annex ZA (informative) Relationship between this European Standard and the Essential

Requirements of EU Directive 2006/42/EC aimed to be covered .............................................. 35

Bibliography ................................................................................................................................................................. 37

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SIST EN 1009-4:2020
EN 1009-4:2020 (E)
European foreword

This document (EN 1009-4:2020) 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 November 2020, and conflicting national standards shall

be withdrawn at the latest by May 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 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).

For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this

document.
This part of EN 1009 is intended to be used in conjunction with EN 1009-1:2020.

EN 1009 “Machines for mechanical processing of minerals and similar solid materials — Safety”

comprises the following parts:
— Part 1: Common requirements for machinery and processing plants

— Part 2: Specific requirements for feeding machinery and continuous handling equipment

— Part 3: Specific requirements for crushing and milling machinery
— Part 4: Specific requirements for screening machinery

— Part 5: Specific requirements for cleaning, recycling and mud treatment machinery

— Part 6: Specific requirements for mobile machinery (in preparation)

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.
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SIST EN 1009-4:2020
EN 1009-4:2020 (E)
Introduction
This document is a type-C standard as stated in EN ISO 12100.

This document is of relevance, in particular, for the following stakeholder groups representing the market

players with regard to machinery safety:
— machine manufacturers (small, medium and large enterprises);

— health and safety bodies (regulators, accident prevention organizations, market surveillance etc.).

Others can be affected by the level of machinery safety achieved with the means of the document by the

above-mentioned stakeholder groups:
— machine users/employers (small, medium and large enterprises);

— machine users/employees (e.g. trade unions, organizations for people with special needs);

— service providers, e.g. for maintenance (small, medium and large enterprises);
— consumers (in case of machinery intended for use by consumers).

The above-mentioned stakeholder groups have been given the possibility to participate at the drafting

process of this document.

The machinery concerned and the extent to which hazards, hazardous situations or hazardous events are

covered are indicated in the Scope of this document.

When requirements of this type-C standard are different from those which are stated in type-A or B

standards, the requirements of this type-C standard take precedence over the requirements of the other

standards for machines that have been designed and built according to the requirements of this type-C

standard.
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SIST EN 1009-4:2020
EN 1009-4:2020 (E)
1 Scope

This document, to be used together with EN 1009-1:2020, specifies the safety requirements and their

verification for the design and construction of screening machinery for the mechanical processing in

quarrying, recycling and processing mineral and by-products as defined in 3.1.

In addition, it specifies the type of information on safe working practices (including residual risks) to be

provided by the manufacturer.

When requirements of this document are different from those which are stated in EN 1009-1:2020, the

requirements of this document take precedence over the requirements of EN 1009-1:2020 for machines

that have been designed and built according to the provisions of this document.

This document, together with EN 1009-1:2020, deals with all the significant hazards, hazardous

situations and events relevant to screening machinery when they are used as intended and under the

conditions foreseen by the manufacturer (see Annex C).
This document does not cover:
— design relating to road traffic regulations;

— hazards arising from the use of the machines in potentially explosive atmospheres as well as from

processing of explosive materials and risks related to electromagnetic compatibility;

— specific hazards related to mobile machinery.

NOTE 1 EN ISO 13766-1 and EN ISO 13766-2 specify test methods and acceptance criteria for evaluating the

electromagnetic compatibility of all kinds of mobile construction machinery.

NOTE 2 prEN 1009-6 “Specific requirements for mobile and semi mobile equipment” is under preparation to

cover specific requirements (e.g. mobility, braking, access, frequent transportation), including exceptions and

additional requirements for mobile and semi mobile equipment. This means that mobile machines are not covered

as long as EN 1009-6 is not published by CEN.

This document is not applicable to screening machinery which are manufactured before the date of

publication of this document by CEN.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 547-1:1996+A1:2008, Safety of machinery — Human body measurements — Part 1: Principles for

determining the dimensions required for openings for whole body access into machinery

EN 547-2:1996+A1:2008, Safety of machinery — Human body measurements — Part 2: Principles for

determining the dimensions required for access openings

EN 1009-1:2020, Machines for mechanical processing of minerals and similar solid materials — Safety —

Part 1: Common requirements for machinery and processing plants

EN ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk

reduction (ISO 12100:2010)

EN ISO 13854:2019, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body

(ISO 13854:2017)
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SIST EN 1009-4:2020
EN 1009-4:2020 (E)

EN ISO 14122-1:2016, Safety of machinery — Permanent means of access to machinery — Part 1: Choice

of fixed means and general requirements of access (ISO 14122-1:2016)

EN ISO 14122-2:2016, Safety of machinery — Permanent means of access to machinery — Part 2: Working

platforms and walkways (ISO 14122-2:2016)

EN ISO 14122-3:2016, Safety of machinery — Permanent means of access to machinery — Part 3: Stairs,

stepladders and guard-rails (ISO 14122-3:2016)

EN ISO 14122-4:2016, Safety of machinery — Permanent means of access to machinery — Part 4: Fixed

ladders (ISO 14122-4:2016)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN ISO 12100:2010,

EN 1009-1:2020 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://www.iso.org/obp/ui
— IEC Electropedia: available at http://www.electropedia.org/
NOTE Annex A shows examples of screening machinery.
3.1
screening machinery

stationary or mobile machinery that separates industrial mineral by-products into two or more fractions

by dry or wet process through use of a screen (3.2)

Note 1 to entry: Screening machinery can be installed in a plant, a modular machinery or a mobile machine, as

defined in EN 1009 1:2020, 3.1 to 3.3 and illustrated in Annex B.
3.2
screen

one of the following machines: vibrating screen (3.3), roller screen (3.4) or tumbler screening machine

(3.5)
3.3
vibrating screen

screen (3.2) oscillated either by hydraulical, mechanical or electrical means for scalping and separation

[SOURCE: ISO 9045:1990, 3.2.38, modified by adding "hydraulical means"]
3.4
roller screen
roll screen

screen (3.2) consisting of a number of horizontal rotating shafts, fitted with elements arranged to provide

screening apertures for scalping and separation

Note 1 to entry: This may be a wobbler screen, a star screen, disk screen or other type of screen with rollers

rotating in the same direction.
[SOURCE: ISO 1213-1:1993, 4.5.8]
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SIST EN 1009-4:2020
EN 1009-4:2020 (E)
3.5
tumbler screening machine
tumbler screen

screening machine with a three-dimensional eccentric motion with a radial and tangential inclination

Note 1 to entry: Basically, this type of machine is used to screen for fine and ultra-fine products.

3.6
screening media
device fitted on each screening deck to separate products into two fractions
Note 1 to entry: This device can be, e.g. metallic, polyurethane or rubber.

Note 2 to entry: The dimension of this device may cover the full size of the screening deck or be composed with

an assembly of several modules.
4 Safety requirements and/or protective/risk reduction measures
4.1 General

Screening machinery shall comply with the requirements of EN 1009-1:2020, as far as not modified or

replaced by the requirements of this part.

For dry operation, when screens are dust-encapsulated, the dust-encapsulation shall allow the

replacement of the screen meshes, inspection and maintenance.

The following functions shall be stopped when opening screen oversize chute, and they shall not be able

to be started when the chutes are open and shall not be automatically re-started when the chutes are

closed:
— drive of the screen;
— relevant upstream and downstream machinery (e.g. bypass).
For maintenance, fall protection shall be provided:
— when the oversize chute is open (e.g. by a folding platform system);
— from the top deck outwards sides of the screen (e.g. by a handrail);
— through the decks of the screen (e.g. by a removable shield).

These access and fall protection shall allow the periodical interventions including the removal of meshes.

In deviation to EN ISO 14122, for maintenance above the screen, instead of fixed guardrails, removable

guardrails or permanent wire ropes providing the same protection as handrail and knee-rail (with no

direct anchorage to the machine) may be provided.

Warning signs (e.g. crushing, shearing, dust, PPE) shall be placed close to the relevant areas.

For inspection and maintenance (checking mesh conditions, greasing, sealing, lining conditions, cleaning,

changing meshes, changing lining, etc.), access and working spaces are specific according to screens

machinery design and shall comply with 4.2.1.
All relevant residual risks shall be part in the information for use in 6.3.1.
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SIST EN 1009-4:2020
EN 1009-4:2020 (E)
4.2 Ergonomics requirements for screening machines maintenance
4.2.1 General
According to EN 1009-1:2020, the EN ISO 14122 series, EN 547-1:1996+A1:2008 and
EN 547-2:1996+A1:2008 apply.

The design of screening machines shall be such that the frequency and duration of maintenance

operations in the screen, in which an operator is required to enter, are minimized.

The design of screening machines should be such that inspection, cleaning and maintenance operations

can be performed from a position outside of the screen box. This can be achieved for example by

providing means to adjust the screen tension from outside the screen box, providing access hatches in

the body of the screen in order to allow upper limb access to the tensioning bolts, reducing the size of the

screening media in order to facilitate the ease of removal of screening medias.

In complement to EN 1009-1:2020, 4.2.1, the minimum dimensions given in 4.2.2 and 4.2.3 shall be

considered taking into account any maintenance hatches and moveable parts that are incorporated into

screening machines. For example:
— moveable conveyors (for example, raising, lowering, sliding conveyors);
— moveable feeding hoppers;
— moveable chute;
— splitting of screens.

Where inspection, cleaning or maintenance is performed when moveable parts are in the raised position,

these moveable parts shall be mechanically secured with a device, for example locking pin. These devices

shall be permanently affixed to the machine or stored on a safe place on the machine.

Inspection, cleaning and maintenance procedures shall be described in the instruction handbook (folding,

dismantling meshes and lining, mechanical parts, etc.), see Clause 6.

In all cases described in 4.2.2 and 4.2.3, the reach distances may be increased depending on the length of

a tool, if such tool is intended to be used according to the instruction handbook of the manufacturer.

The mesh material can be metallic, rubber (RU) or polyurethane (PU) with tensioning or modular system.

Whatever is the mesh material the inspection, cleaning and maintenance procedures shall be described

in the instruction handbook (folding, dismantling meshes and lining, mechanical parts, etc.), see Clause 6.

4.2.2 Minimum dimensions for inspection
4.2.2.1 Inspection laterally from outside through an opening for one upper limb

As one arm is sufficient for access through an access opening with a minimum diameter, C, of 141 mm for

inspection from outside, maximum dimension for one upper limb to reach the inspection area (R) shall

be 495 mm (see Figure 1). It may be increased if the access openings, C, are larger than the minimum

dimensions.
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SIST EN 1009-4:2020
EN 1009-4:2020 (E)
Key
C minimum opening diameter
R maximum reaching distance (radius from opening)
Figure 1 — Access for inspection from outside and laterally through an opening
4.2.2.2 Inspection from outside through access opening(s) with two arms

Horizontal access openings for two arms shall be, as illustrated in Figure 2, the following minimum

distances:
A = 645 mm
B = 221 mm
H = 1 520 mm
Maximum reach distance = 462 mm

The maximum reach distance may be increased if the access openings are larger than the minimum

dimensions.

This requirement does not apply to screens the width of which is less than 645 mm.

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SIST EN 1009-4:2020
EN 1009-4:2020 (E)
Dimensions in millimetres
Key
A minimum width of opening
B minimum height of opening
H maximum height of the bottom point of the opening from ground level
Figure 2 — Inspection from outside through access opening(s) with two arms

The maximum dimension for upper limbs to reach the inspection area given value of 495 mm is a

minimum value linked to the minimum dimensions of the access opening. It may be increased with a

bending position.
4.2.2.3 Inspection from outside from the top

Horizontal access openings for two arms shall be the following minimum distances:

A = 645 mm
B = 221 mm
H = 903 mm to 1 152 mm
R = 462 mm

The maximum reach distance may be increased if the access opening are larger than the minimum

dimensions.
4.2.3 Minimum dimensions for maintenance
4.2.3.1 Maintenance from outside from front and rear

The opening for one or both arms shall be the followings minimum distances, as illustrated in Figure 3:

A = 645 mm
B = 300 mm
R = 506 mm
H ≤ 1 230 mm.

NOTE If the opening is greater than the minimum required dimensions, the grip reach value can increase.

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SIST EN 1009-4:2020
EN 1009-4:2020 (E)
Dimensions in millimetres
Key
A minimum width of opening
B minimum height of opening
R maximum reaching distance (radius from opening)
H maximum height of the bottom point of the opening from ground level

Figure 3 — Maintenance from outside from front and rear through access opening(s)

4.2.3.2 Maintenance from outside from the top

a) Access for maintenance downwards through a limited opening shall comply with the followings:

A = 645 mm
B = 300 mm
R = 506 mm
H = 900 mm to 1 200 mm.

Value H is a minimum value; It may be increased with a bending position if the means of access (H)

is between 900 mm and 1 200 mm (see Figure 3).

b) Access for maintenance forwards without limitation shall comply with the followings:

R = 615 mm
H = 900 mm to 1 200 mm.
See Figure 4.
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SIST EN 1009-4:2020
EN 1009-4:2020 (E)
c) In case of lying position:

1) there is also the possibility to carry out maintenance with 2 arms, each arm reaching through a

separate opening (reaching through different longitudinal beams);

2) where access openings are in a horizontal surface for downward entry, space shall be provided

for a lying position of the operator;

3) if the grip reach distance requirement is greater than 506 mm the dimensions of the access

opening shall be increased to allow entry of the upper body.
The minimum dimension for each opening shall be:
A = 221 mm
R = 506 mm.
Dimensions in millimetres
Key
R maximum reaching distance (radius from opening)
H maximum height of the bottom point of the opening from ground level
Figure 4 — Maintenance from the top without limitation
4.2.4 Minimum dimensions for inspection and maintenance from inside
4.2.4.1 General

If it is necessary to enter inside the screen for inspection and maintenance, in exemption to

EN 1009-1:2020, 4.2.1 the following subclauses 4.2.4.2 and 4.2.4.3 apply.

NOTE If there are space constraints in an existing plant, identical replacement of a screen is a spare part

replacement and therefore does not need to meet this requirement.
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SIST EN 1009-4:2020
EN 1009-4:2020 (E)
4.2.4.2 Passage from the top to work inside
The minimum dimensions of the passage from the top shall be:
— rectangular opening:
A = 645 mm
B = 450 mm
See Figure 5 a.
— circular opening:
C = 645 mm
See Figure 5 b.

The distance between two decks under cross beam shall be 550 mm, except for replacement or upgrade

on an existing plant due to space constraints, this minimum distance (H ) may be 450 mm.

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SIST EN 1009-4:2020
EN 1009-4:2020 (E)
Dimensions in millimetres
a) rectangular opening
b) circular opening
Key
A minimum width of opening
B minimum height of opening
C minimum opening diameter
Figure 5 — Passage from the top to work inside
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SIST EN 1009-4:2020
EN 1009-4:2020 (E)
4.2.4.3 Passage to access inside the screen
4.2.4.3.1 General
Minimum passage shall be minimum:

— to enter the body face to the opening (see Figure 6): 645 mm (4.2.9 shoulder Bideltoid) × 450 mm

(4.1.11 Thorax Width ISO 7250-3);

— to enter the body laterally to the opening (see Figure 7): 1 062 mm (4.2.8 sitting height 962 mm

+ 100 mm clothes) × 366 mm (chest depth 266 mm + 100 mm, P95).

The height of the platform shall comply with the requirements of EN ISO 14122-2:2016.

4.2.4.3.2 Punctual obstacle inside the screen

The distance between two decks under cross beam shall be 550 mm, except for replacement or upgrade

on an existing plant due to space constraints, this minimum distance may be 450 mm. See Figure 6.

In case where the minimum height (H ) is 450 mm because of space constraints listed above, the distance

(H ) between the deck and the obstacle shall be minimum 366 mm. See Figure 8.
Dimensions in millimetres
Key
A minimum width of opening
B minimum height of opening
H1 distance between two decks under cross beam
H2 distance between the deck and the obstacle

Figure 6 — Passage to access inside the screen – Entering the body face to the opening

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SIST EN 1009-4:2020
EN 1009-4:2020 (E)
Dimensions in millimetres
Key
A minimum width of opening
B minimum height of opening
H distance between two decks under cross beam

Figure 7 — Passage to access inside the screen – Entering the body laterally to the opening

Dimensions in millimetres
Key
A minimum width of opening
H distance between two decks under cross beam
H2 distance between the deck and the obstacle
Figure 8 — Passage dimensions between two decks if crawling is required
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SIST EN 1009-4:2020
EN 1009-4:2020 (E)
4.2.4.4 Working space to work inside
4.2.4.4.1 General

For maintenance on the upper deck of a screen, safety devices (e.g. guardrails, anti-fall device) shall be

installed during the operations and shall be described in the maintenance manual.

For maintenance from the rear or the front between two decks, the minimum width (A) shall be 645 mm

(see Figure 8).

The distance between two decks under cross beam shall be 550 mm except for replacement or upgrade

on an existing plant due to space constraints, this minimum distance (H ) may be 450 mm.

When it is not necessary to access beneath the obstacle(s) (see 4.2.4.4.2 and 4.2.4.4.3), the height below

obstacle(s) under which the operator can work shall be at least 300 mm.

When it is not necessary to access beneath the obstacle(s) nor needed to use tool, then the height below

the obstacle does not apply (e.g. self-supporting media) and the working procedure shall be provided in

the instructions for use.
4.2.4.4.2 Case of a single punctual obstacle (e.g. transmission mechanism)

The length of a punctual obstacle shall be no more than 393 mm, under the condition that access is

possible from each side of the obstacle (see Figure 9 and Figure 10).
Dimensions in millimetres

Figure 9 — Maximum dimensions of a punctual obstacle when access is possible one side

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SIST EN 1009-4:2020
EN 1009-4:2020 (E)
Dimensions in millimetres

Figure 10 — Maximum dimensions of a punctual obstacle when access is possible from each side

4.2.4.4.3 Case of a combination of two cylindrical punctual obstacles (e.g. double transmission

mechanism)

For a combination of two cylindrical punctual obstacles, to allow the operator to work from each side of

the obstacles, the distance (D) between axles shall be determined on the basis of the values given in

Table 1 and illustrated in Figure 11.

Table 1 — Minimum working distance (D) between axles in case of a combination of two

obstacles
Height Distance between axles
H D
mm mm
300 700
375 800
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SIST EN 1009-4:2020
EN 1009-4:2020 (E)
Key
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