oSIST prEN ISO 20500-6:2020

Mobile road construction machinery - Safety - Part 6: Specific requirements for mobile feeders (ISO/DIS 20500-6:2020)

This part of EN 500 specifies the safety requirements for paver-finishers as defined in Clause 3 and deals with the significant hazards relevant to these machines, when they are used as intended and under conditions of misuse which are reasonably foreseeable. This part of EN 500 contains additional requirements to EN 500-1 "Common requirements". If internal and/or external vibrators are used for concrete paving, then prEN 12649 applies.

Bewegliche Straßenbaumaschinen - Sicherheit - Teil 6: Besondere Anforderungen an mobile Beschicker (ISO/DIS 20500-6:2020)

Dieser Teil von ISO 20500 behandelt, zusammen mit Teil 1, alle signifikanten Gefährdungen für Beschicker, wenn diese bestimmungsgemäß und unter den vernünftigerweise vom Hersteller vorhersehbaren Fehlbedienungsbedingungen während der gesamten Lebensdauer der Maschine verwendet werden (siehe Anhang C).
Die Anforderungen dieses Teils ergänzen die gemeinsamen Anforderungen, die in ISO 20500 1 formuliert sind.
Dieses Dokument wiederholt nicht die Anforderungen aus ISO 20500 1, sondern ergänzt oder ersetzt die Anforderungen zur Anwendung für Beschicker.
Die folgenden signifikanten und relevanten Gefährdungen werden in diesem Dokument nicht behandelt:
- Blitzeinschlag.

Machines mobiles pour la construction de routes - Sécurité - Partie 6: Prescriptions spécifiques pour alimentateurs d'enrobé (ISO/DIS 20500-6:2020)

Premični stroji za gradnjo cest - Varnost - 6. del: Posebne zahteve za premične dovajalnike (ISO/DIS 20500-6:2020)

General Information

• Status: Not Published
• Public Enquiry End Date: 30-Sep-2020
• ICS: 93.080.10 - Road construction
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 20-Jul-2020
• Due Date: 07-Dec-2020
• Completion Date: 05-Oct-2020
• Directive: 2006/42/EC - Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast)
• Mandate: M/396 - Mandate to CEN and Cenelec for standardisation in the field of machinery
• Ref Project: prEN ISO 20500-6 - Mobile road construction machinery - Safety - Part 6: Specific requirements for paver-finishers

Relations

• Revised: SIST EN 500-6:2007+A1:2008 - Mobile road construction machinery - Safety - Part 6: Specific requirements for paver-finishers
• Effective Date: 18-Jan-2023
• Revised: SIST EN 500-6:2007+A1:2008 - Mobile road construction machinery - Safety - Part 6: Specific requirements for paver-finishers
• Effective Date: 03-Oct-2018

Overview

The draft international standard oSIST prEN ISO 20500-6:2020:2020 specifies safety requirements for mobile feeders, a type of mobile road construction machinery used primarily to transfer paving materials continuously from trucks or windrows to paver-finishers. This document is part 6 of the ISO 20500 series and complements the common safety requirements defined in ISO 20500-1, addressing specific hazards associated with mobile feeders.

Developed under the auspices of the International Organization for Standardization (ISO) and the European Committee for Standardization (CEN), this standard applies to the entire lifecycle of mobile feeders - including design, operation, and foreseeable misuse - to ensure risk reduction and operator safety. It is categorized as a Type C standard as per ISO 12100, implying comprehensive technical safety measures tailored for this machinery category.

Key Topics

• Scope and Applicability
  The standard covers self-propelled mobile feeders, either rubber-tyred or crawler-mounted, utilized in road construction for continuous paving material transfer to paver-finishers. It complements and expands upon ISO 20500-1's common safety mandates without duplicating them.
  Notably, hazards such as lightning are excluded from this part.

• Safety Requirements and Risk Reduction
  Mobile feeders must conform to:

  • Safety principles outlined in ISO 12100 for relevant hazards not otherwise covered.
  • Specific requirements regarding operator visibility, protection, noise control, vibration minimization, electromagnetic compatibility (EMC), control systems, and safe access to operator stations and maintenance points.

• Visibility Performance
  Enhanced guidelines for visibility aim to prevent operator blind spots that could lead to accidents. Performance criteria establish measurable limits on visual masking, ensuring operators maintain clear sight lines during operation.

• Noise and Vibration Control
  Annex A outlines detailed procedures for noise measurement in compliance with ISO 3744 and ISO 11201, facilitating the determination of noise levels emitted by mobile feeders during operation and at the operator's station to safeguard hearing health.

• Operators’ Manual and Signage
  Comprehensive instructions for use, including warning signals, signs, and operator guidance, are mandated to improve operational safety awareness.

• Verification of Compliance
  The document emphasizes testing and verification to confirm that all safety features and risk reduction measures comply with the standard's requirements.

Applications

oSIST prEN ISO 20500-6:2020 is essential for:

• Manufacturers of mobile feeders ensuring their equipment meets international safety benchmarks.
• Construction companies and contractors deploying road construction machinery to promote occupational safety and minimize accident risks.
• Regulatory bodies and safety inspectors evaluating compliance of road construction equipment with mandated safety standards.

By adhering to these specific safety requirements, stakeholders enhance equipment reliability, reduce downtime caused by accidents, and contribute to safer work environments in road paving operations.

Related Standards

This part 6 standard is part of a comprehensive series concerning mobile road construction machinery safety:

• ISO 20500-1: Common safety requirements for all mobile road construction machinery.
• ISO 20500-5: Specific requirements for paver-finishers.
• ISO 12649: Safety requirements when internal or external vibrators are used for concrete paving, applicable alongside this standard if relevant.
• ISO 15878: Terminology and commercial specifications specifically for asphalt pavers.
• ISO 12100: General principles for design and risk assessment for machinery safety.
• ISO 3744 & ISO 11201: Acoustic measurement standards relevant for noise assessment.

Following oSIST prEN ISO 20500-6:2020 fosters alignment with European machinery directives such as Directive 2006/42/EC related to machinery safety, ensuring mobile feeders meet essential health and safety requirements.

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Keywords: oSIST prEN ISO 20500-6:2020, mobile feeders safety, road construction machinery, paving equipment safety, operator visibility, noise control, vibration reduction, ISO 20500 series, mobile road construction machinery standards, machinery risk assessment, mobile feeder compliance, construction equipment safety.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2020
Premični stroji za gradnjo cest - Varnost - 6. del: Posebne zahteve za premične
dovajalnike (ISO/DIS 20500-6:2020)
Mobile road construction machinery - Safety - Part 6: Specific requirements for mobile
feeders (ISO/DIS 20500-6:2020)
Bewegliche Straßenbaumaschinen - Sicherheit - Teil 6: Besondere Anforderungen an
mobile Beschicker (ISO/DIS 20500-6:2020)
Machines mobiles pour la construction de routes - Sécurité - Partie 6: Prescriptions
spécifiques pour alimentateurs d'enrobé (ISO/DIS 20500-6:2020)
Ta slovenski standard je istoveten z: prEN ISO 20500-6
ICS:
93.080.10 Gradnja cest Road construction
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT INTERNATIONAL STANDARD
ISO/DIS 20500-6
ISO/TC 195 Secretariat: SAC
Voting begins on: Voting terminates on:
2020-07-10 2020-10-02
Mobile road construction machinery — Safety —
Part 6:
Specific requirements for mobile feeders
ICS: 93.080.10
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 20500-6:2020(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2020

ISO/DIS 20500-6:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
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ISO/DIS 20500-6:2020(E)
Contents Page
Foreword . v
Introduction . vii
1 Scope .1
2 Normative references .1
3 Terms and definitions .1
4 Safety requirements and/or protective/risk reduction measures .2
4.1 General .2
4.2 Visibility .3
4.2.1 Visibility performance criteria .3
4.2.2 Visibility performance criteria for the RB .3
4.3 Operator's station .4
4.4 Controls and indicators .4
4.5 Access systems to operator's station and to maintenance points.5
4.6 Protection .5
4.7 Signal devices and warning signs.5
4.8 Electro-magnetic compatibility (EMC) .5
4.9 Noise and vibration .5
4.10 Conveyors .5
5 Verification of the safety requirements and/or protective/risk reduction measures .6
6 Information for use .7
6.1 Warning signals and devices .7
6.2 Operator’s manual .7
Annex A (normative) Noise test code for mobile feeders .8
A.1 Scope .8
A.2 Determination of A-weighted sound power level .8
A.2.1 General .8
A.2.2 Measurement surface .8
A.2.3 Size of the measurement surface .8
A.2.4 Microphone positions on the hemispherical measurement surface .9
A.2.5 Positioning of the machine .9
A.2.6 Repetition of the test .9
A.3 Determination of A-weighted emission sound pressure level at the operator's
position . 10
A.3.1 General . 10
A.3.2 Enclosed operator's positions . 10
A.3.3 Quantities to be determined . 10
A.3.4 Repetition of the test . 10
A.3.5 Microphone position(s) . 10
A.4 Operation conditions . 10
A.4.1 Fan speed . 10
A.4.2 Operating conditions for working units . 11
A.5 Uncertainty . 11
A.6 Information to be recorded . 11
iii
ISO/DIS 20500-6:2020(E)
A.7 Information to be reported . 12
A.8 Declaration and verification of noise emission values . 12
Annex B (informative) Examples of mobile feeders . 14
Annex C (normative) List of significant hazards . 16
For European version only . 20
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2006/42/EC aimed to be covered . 21

iv
ISO/DIS 20500-6:2020(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any
patent rights identified during the development of the document will be in the Introduction and/or on
the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the World
Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 195, Building construction machinery and
equipment.
ISO 20500 consists of the following parts, under the general title Mobile road construction machinery —
Safety:
— Part 1: Common requirements
— Part 2: Specific requirements for road-milling machines
— Part 3: Specific requirements for soil-stabilising machines and recycling machines
— Part 4 Specific requirements for compaction machines
— Part 5: Specific requirements for paver-finishers
— Part 6: Specific requirements for mobile feeders
— Part 7: Specific requirements for slipform pavers and texture curing machines
A list of all parts in the ISO 20500 series can be found on the ISO website.
v
ISO/DIS 20500-6:2020(E)
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
vi
ISO/DIS 20500-6:2020(E)
Introduction
This International Standard is a type C standard as stated in ISO 12100.
The machinery concerned and the extent to which hazards, hazardous situations and events are covered
are indicated in the scope of this International 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.
Mobile feeders are typically self-propelled machines used in the continuous transfer of paving materials
from trucks to paver finishers. Some mobile feeders are capable of feeding multiple paver finishers.

vii
DRAFT INTERNATIONAL STANDARD ISO/DIS 20500-6:2020(E)
Mobile road construction machinery — Safety —
Part 6:
Specific requirements for mobile feeders
1 Scope
This part of ISO 20500, together with part 1, deals with all significant hazards for mobile feeders when
they are used as intended and under the conditions of misuse which are reasonably foreseeable by the
manufacturer associated with the whole life time of the machine (see Annex C).
The requirements of this part are complementary to the common requirements formulated in
ISO 20500-1.
This document does not repeat the requirements from ISO 20500-1, but adds or replaces the
requirements for application for mobile feeder.
The following significant and relevant hazards are not covered in this document:
— Lightning.
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.
ISO 3744:2010, Acoustics — Determination of sound power levels and sound energy levels of noise sources
using sound pressure — Engineering methods for an essentially free field over a reflecting plane
ISO 11201:2010, Acoustics — Noise emitted by machinery and equipment — Determination of emission
sound pressure levels at a work station and at other specified positions in an essentially free field over a
reflecting plane with negligible environmental corrections
ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction
ISO 15878:2008, Road construction and maintenance equipment — Asphalt pavers — Terminology and
commercial specifications
ISO 20500-1, Mobile road construction machinery — Safety — Part 1: Common requirements
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
ISO/DIS 20500-6:2020(E)
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
mobile feeder
self-propelled machine intended to transfer paving material from a truck or a windrow to a paver finisher
for continuous paving without physical contact of mobile feeder and paver
Note 1 to entry: Mobile feeders can be either rubber-tyred or crawler-mounted.
3.2
windrow elevator
machine equipped with a windrow material reception and a conveyor intended to transfer paving
material into the hopper of a paver- finisher or a hopper insert
Note 1 to entry It can be either self-propelled or rigidly fixed as an interchangeable equipment to a paver-
finisher equipped with a windrow material reception and a conveyor.
3.3
windrow material reception
device installed on a windrow elevator or mobile feeder intended to receive paving material laying on
the surface as a windrow and to guide it onto a conveyor
3.4
internal storage
device installed on a mobile feeder intended to enlarge the storage capacity of the combination of mobile
feeder and paver-finisher
3.5
mixing unit
device installed on the lower side of a hopper insert or at the beginning of the discharge conveyor of a
mobile feeder or windrow elevator intended to break up and mix chunky portions of paving material
3.6
discharge conveyor
device intended to transfer paving material from the mobile feeder or windrow elevator to the paver
finisher
Note to entry 1 Device can be rigid or slewing type.
3.7
hopper insert
device to increase hopper capacity
[SOURCE: ISO 15878:2008]
4 Safety requirements and/or protective/risk reduction measures
4.1 General
Mobile feeders shall comply with the safety requirements and/or protective/risk reduction measures of
this clause. In addition, the machines shall be designed according to the principles of EN ISO 12100:2010
for relevant but not significant hazards which are not dealt with by this document.
ISO/DIS 20500-6:2020(E)
Mobile feeders shall comply with the requirements of FprEN 474-1:2019, as far as not modified or
replaced by the requirements of this part.
4.2 Visibility
4.2 of ISO 20500-1 applies with the following additions.
4.2.1 Visibility performance criteria
The machine meets the requirements of this International Standard if the measurement results show no
maskings or maskings smaller than or equal to the performance criteria with direct or indirect view as
specified in Table 2.
Table 1 — Visibility performance criteria

c
A B C D E F
b b a
205  205 205 205
205 205 405
-------- -------- -------- --------
-------- -------- ------
1 - 700 2 – 1300 2 – 1300 2 - 1300
2 – 1300 2 – 1300 300
a
The area below the conveyor will not be evaluated (dimension XX according to Table 4)
b
If the maskings exceed the given value in Sector B or C, the requirement is also fulfilled, if only one masking
remains at a height of 1000 mm above GRP
c
RB
4.2.2 Visibility performance criteria for the RB
The machine meets the requirements of the standard if the measurement results show no maskings or
maskings smaller or equal to the acceptable maskings (300 mm) when evaluated using the eye spacing
specified in Table 1 for the RB and using the test object height for each region as specified in Table 3.
ISO/DIS 20500-6:2020(E)
Table 2 — Vertical test object height by region of rectangular boundary
Region of the RB
Front side Left hand side Right hand side Rear side
1,5 m 1,5 m 1,5 m 1,5 m
(with gap XX)
under the
conveyor, see
Table 4)
Table 3 — Setup of the machines

HH: height of pulley center above ground

XX is defined as the width of the conveyor supension+2 x 150mm

Additional information to be recorded:
— dimension HH;
— dimension XX.
4.3 Operator's station
4.4 of ISO 20500-1 applies with the following exception:
— in sub-clause 4.4.2, the first paragraph does not apply to mobile feeders.
4.4 Controls and indicators
4.6 of ISO 20500-1 applies with the following addition:
ISO/DIS 20500-6:2020(E)
— where a slewing conveyor is fitted, it shall not be activated simultaneously from more than one
operator's station. Controls for the regulation of the slewing conveyor shall be of hold-to-run type;
— the motion of slewing conveyor (if equipped) shall not be activated by unintended touch of the
control (for example by entanglement of clothing during getting up from the operator's seat).
4.5 Access systems to operator's station and to maintenance points
The requirements of ISO 20500-1, clause 4.9, apply with the following exceptions:
— 4.9 does not apply for access systems leading to service points in the area of the material hopper.
4.6 Protection
In addition to the requirements of ISO 20500-1, clause 4.10, the following applies:
— protective means (for example deflecting element on discharge conveyor or hopper insert equipped
with guard) have to be taken to prevent paver- finisher operators from being buried by conveyed
paving material;
— protective means (for example tying down or positive engagement) have to be taken to prevent
hopper insert from falling out of the hopper.
4.7 Signal devices and warning signs
In addition to the requirements of ISO 20500-1, clause 4.15, the following applies:
— discharge conveyors slewing transverse to working movement, which could form crushing or
shearing zones during their slewing movement shall be fitted with yellow flashing lights. Those
flashing lights shall be located on lateral sides in proximity to the pulleys and shall be activated
automatically when the conveyor is slewing.
4.8 Electro-magnetic compatibility (EMC)
In addition to the requirements of ISO 20500-1, clause 4.17, the following applies:
— the antenna shall be located successively on the left- and right-hand sides of the mobile feeder, with
the antenna parallel to the plane of the longitudinal symmetry of the mobile feeder and in line with
the SIP.
4.9 Noise and vibration
4.19.2 and 4.19.3 of ISO 20500-1 apply with the following addition:
— for the determination of the noise emission values, Annex A applies to mobile feeders.
4.10 Conveyors
4.8 of ISO 20500-1 applies with the following exemption:
— Hopper conveyors need not to comply with 4.8 of ISO 20500-1.
ISO/DIS 20500-6:2020(E)
5 Verification of the safety requirements and/or protective/risk reduction
measures
Safety requirements and/or protective/risk reduction measures of Clauses 4 and 6 of this document shall
be verified according to Table 4.
Table 4 sets out verification methods which shall be applied for each safety requirement in this document.
Where X(s) is indicated in the table, the corresponding verification method(s) shall be applied.
Table 4 shall be read in conjunction with the corresponding clauses.
Table 4 includes the following verification methods:
a) calculation: to establish that the requirements of this document have been met;
b) visual verification: to establish that something is present (e.g. a guard, a marking, a document);
c) measurement: to show that the required numerical values have been met (e.g. geometric dimensions,
safety distances, resistance of insulation of the electric circuits, results of physical tests);
d) functional tests: to show that the adequate signals intended to be forwarded to the main control
system of the complete machine are av
...