ISO/FDIS 20500-6

ISO/TC 195
Secretariat: SAC
Date: 2024-10-302025-01-16
Mobile road construction machinery — Safety —
Part 6:
Specific requirements for mobile feeders
Machines mobiles pour la construction de routes — Sécurité —
Partie 6: Prescriptions spécifiques pour alimentateurs d'enrobé
FDIS stage
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ii
Contents
Foreword . iv
Introduction . v
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
4.3 Operator's station . 5
4.4 Controls and indicators . 5
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) . 6
4.9 Noise . 6
4.10 Conveyors . 6
5 Verification of the safety requirements and/or protective/risk reduction measures . 6
6 Information for use – Operator´s manual . 7
Annex A (normative) Noise test code for mobile feeders . 8
Annex B (informative) Examples of mobile feeders . 15
Annex C (informative) List of significant hazards . 18
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2006/42/EC aimed to be covered . 22
Bibliography . 26

iii
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
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established has the right to be represented on that committee. International organizations, governmental and
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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 documentsdocument 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 drawnISO draws attention to the possibility that some of the elementsimplementation of this
document may beinvolve the subjectuse of (a) patent(s). ISO takes no position concerning the evidence,
validity or applicability of any claimed patent rights in respect thereof. As of the date of publication of this
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However, implementers are cautioned that this may not represent the latest information, which may be
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This document was prepared by Technical Committee ISO/TC 195, Building construction machinery and
equipment, in collaboration with the European Committee for Standardization (CEN) Technical Committee
CEN/TC 151, Construction equipment and building material machines - Safety, in accordance with the
Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
A list of all parts in the ISO 20500 series can be found on the ISO website.
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.
iv
Introduction
This document is a type-C standard as stated in 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 organisations, 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, organisations 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 type-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.
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.
v
Mobile road construction machinery — Safety —
Part 6:
Specific requirements for mobile feeders
1 Scope
This document, together with ISO 20500-1:—, deals with all significant hazards, hazardous situations and
events relevant to mobile feeders when used as intended and under the conditions of misuse which are
reasonably foreseeable by the manufacturer (see Annex C) associated with the whole lifetime of the machine
as described in ISO 12100:2010, 5.4.
The requirements of this document are complementary to the common requirements formulated in
ISO 20500-1:—. This document does not repeat the requirements of ISO 20500-1:— but supplements or
modifies the requirements for mobile feeders.
Lightning as a significant and relevant hazard is not covered in this document.
This document is not applicable to mobile feeders manufactured before the date of its publication.
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 20500-1:—, Mobile road construction machinery — Safety — Part 1: Common requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12100:2010, ISO 20500-1:— and
the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1 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 (see Figure B.2) or crawler-mounted (see Figure B.1).
3.2 3.2
windrow elevator
machine equipped with a windrow material reception (3.3) and a conveyor intended to transfer paving
material into the hopper of a paver-finisher or a hopper insert (3.7)
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.
Note 2 to entry: An example can be found in Figure B.3
3.3 3.3
windrow material reception
device installed on a windrow elevator (3.2) or mobile feeder (3.1) intended to receive paving material laying
on the surface as a windrow and to guide it onto a conveyor
3.4 3.4
internal storage
device installed on a mobile feeder (3.1) intended to enlarge the storage capacity of the combination of mobile
feeder and paver-finisher
3.5 3.5
mixing unit
device installed on the lower side of a hopper insert (3.7) or at the beginning of the discharge conveyor (3.6) of
a mobile feeder (3.1) or windrow elevator (3.2) intended to break up and mix chunky portions of paving
material
3.6 3.6
discharge conveyor
device intended to transfer paving material from the mobile feeder (3.1) or windrow elevator (3.2) to the paver-
finisher
Note 1 to entry: This device can be rigid or slewing type.
3.7 3.7
hopper insert
device to increase hopper capacity
[SOURCE: ISO 15878:2021, 3.28]
4 Safety requirements and/or protective/risk reduction measures
4.1 General
4.1.1 Context
Mobile feeders shall conform to the safety requirements and/or protective/risk reduction measures of this
clause. In addition, the machines shall be designed according to the principles of ISO 12100:2010 for relevant
but not significant hazards which are not dealt with by this document.
4.1.2 Specific relation to ISO 20500-1
Mobile feeders shall conform to the requirements of ISO 20500-1:—, as far as not modified or replaced by the
requirements of this document.
4.2 Visibility
4.2.1 General
ISO 20500-1:—, 4.2 applies with the additions specified in 4.2.24.2.2 and 4.2.34.2.3.
4.2.2 Visibility performance criteria
The measurement results, when tested using the setup as shown in Figure 1, shall show no maskings or
maskings smaller than or equal to the performance criteria with direct or indirect view as specified in Figure 1.

Sector A B C D E F RB
b b a
Eye spacing 205 mm 205 mm 205 mm 205 mm 205 mm 205 mm 405 mm
Number and 1 time 2 times 2 times 2 times 2 times 2 times 300 mm
width of
700 mm 1 300 mm 1 300 mm 1 300 mm 1 300 mm 1 300 mm
masking
Key
1 rectangular boundary (RB)
a
The area below the conveyor is not evaluated (dimension XX according to this figure).
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 1 000 mm above GRP (ground reference plane).
Y Y-axis and forward direction of machine
Figure 1 — Visibility performance criteria
4.2.3 Visibility performance criteria for the RB
The measurement results shall 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 Figure 2.
Table 1 applies in addition to ISO 20500-1:—, Table 3.
Table 1 — Vertical test object height by region of rectangular boundary
Region of the RB
Front side Left-hand side Right-hand Rear side
side
1,5 m 1,5 m 1,5 m 1,5 m
(with gap XX
under the
conveyor, see
Figure 1)
This table applies in addition to Table 3 of Part 1.

a) side view
b) top view
Key
1 Distancedistance of 1 m (RB – rectangular boundary, 1 m from all four sides)
H height of pulley centre above ground
X width of the conveyor suspension + 2 x× 150 mm
Figure 2 — Setup of the machines
The following additional information shall be recorded:
— dimension H;
— dimension X.
4.3 Operator's station
ISO 20500-1:—, 4.4 applies with the following exception:
— in ISO 20500-1:—, 4.4.2, the first sentence does not apply to mobile feeders.
4.4 Controls and indicators
ISO 20500-1:—, 4.6 applies with the following addition:
— where a slewing conveyor is fitted, it shall not be activated simultaneously from more than one operator's
station;
— controls for slewing the 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:—, 4.9 apply with the following exceptions:
ISO 20500-1:—, 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:—, 4.10, the following applies:
— protective means (e.g. deflecting element on discharge conveyor or hopper insert equipped with guard)
shall be provided to prevent paver-finisher operators from being buried by conveyed paving material;
— protective means (e.g. tying down or positive engagement) shall 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:—, 4.15, the following applies:
Discharge conveyors slewing transverse to working movement, which can 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:—, 4.18, 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 (seat
index point).
4.9 Noise
ISO 20500-1:—, 4.19 applies with the following addition:
The noise test shall be carried out as specified in Annex A.
4.10 Conveyors
ISO 20500-1:—, 4.8 applies with the following exemption:
ISO 20500-1:20XX, 4.8, does not apply to rigidly installed material conveyors placed inside the hopper.
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 shall be verified according
to Table 2.
Table 2 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 2 shall be read in conjunction with the corresponding clauses/subclauses.
Table 2Table 2 applies in addition to ISO 20500-1:—, Table 3 of Part 1.
Table 2 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 available and conform to the requirements and the technical documentation;
e) special verification: by reference to a standard which is mentioned in the corresponding clause/subclause.
Table 2 — Verification of safety requirements and/or protective/risk reduction measures
Clause/su Title a) b) c) d) e)
bclause Cal Vis Me Fun Speci
number cul ual asu ctio al
atio veri re nal verifi
n fica me test catio
tion nt n
4 Safety requirements and/or protective/risk reduction measures
4.1 General
4.1.1 Context     X
4.1.2 Specific relation to ISO 20500-1     X
4.2 Visibility
4.2.1 General     X
4.2.2 Visibility performance criteria   X  X
4.2.3 Visibility performance criteria for the RB   X  X
4.3 Operator's station     X
4.4 Controls and indicators    X X
4.5 Access systems to operator's station and to maintenance points     X
4.6 Protection  X  X X
4.7 Signal devices and warning signs  X  X X
4.8 Electro-magnetic compatibility (EMC)   X  X
4.9 Noise   X  X
4.10 Conveyors     X
6 Information for use – operator´s manuals  X   X
Annex A Noise test code for mobile feeders   X
Annex B Examples of mobile feeders
6 Information for use – Operator´s manual
ISO 20500-1:—, 6.2, applies with the following additions:
— information about the recommended number of operators depending on job site application;
— information for a safe cleaning of the hopper and conveyors;
— information for a safe handling of gas bottles (including transportation);
— warning message that it is forbidden to transport dangerous goods (e.g. gas bottles) in the hopper;
— instruction that it is not permitted to use the hopper for transportation.
Annex A
(normative)
Noise test code for mobile feeders
A.1 General
This noise test code specifies all the information necessary to carry out efficiently and under standardized
conditions the determination, declaration and verification of the noise emission characteristics of mobile
feeders.
Noise emission characteristics include emission sound pressure levels at operator´s station and the sound
power level. The determination of those quantities is necessary for:
— manufacturers to declare the noise emitted;
— comparing the noise emitted by machines in the family concerned;
— purposes of noise control at the source at the design stage;
— users to carry out their risk assessment with the help of sound pressure levels at operator's station.
The use of this noise test code ensures reproducibility of the determination of the noise emission
characteristics within specified limits determined by the grade of accuracy of the basic noise-measurement
method used. Noise-measurement methods allowed by this document are engineering methods (grade 2).
A.2 Determination of A-weighted sound power level
A.2.1 General
This annex specifies additional requirements for the determination of A-weighted sound power level
according to ISO 3744:2010.
A.2.2 Measurement surface
A hemispherical test area shall be used for measurement.
A.2.3 Size of the measurement surface
The radius shall be calculated from the basic length L of the machine (Figure A.1). The basic length includes
the main body of the machine plus working units, such as conveyor. The width of the machine shall be the
basic width of the mobile feeder.
Key
L basic length of the machine
Figure A.1 — Basic length of the machine
The radius shall be:
— 4 m when the basic length L of the machine to be tested is less than or equal to 1,5 m;
— 10 m when the basic length L of the machine to be tested is greater than 1,5 m but less than or equal to
4 m;
— 16 m when the basic length L of the machine to be tested is greater than 4 m.
A.2.4 Microphone positions on the hemispherical measurement surface
Six microphone positions (i.e. positions 2, 4, 6, 8, 10 and 12) shall be arranged according to Figure A.2.

Microphone
x/r y/r z
position
2 0,7 0,7 1,5 m
4 −0,7 0,7 1,5 m
6 −0,7 −0,7 1,5 m
8 0,7 −0,7 1,5 m
10 −0,27 0,65 0,71r
12 0,27 −0,65 0,71r
Key
x distance between the microphone position and the Y-axis
y distance between the microphone position and the X-axis
z distance between the microphone position and the ground level
Figure A.2 — Microphone positions
A.2.5 Positioning of the machine
The centre of the machine shall coincide with the centre of the hemisphere, which is the intersecting point of
the X-axis and Y-axis (see Figure A.2). The front (direction of travelling) of the machine shall point towards
the microphone positions 2 and 8. For positioning the machine, the middle of the basic length L shall be
regarded as the central point.
A.2.6 Repetition of the test
The A-weighted sound power level shall be determined at least three times. If at least two of the determined
valu
...