ISO 20500-7:2026

International
Standard
ISO 20500-7
First edition
Mobile road construction
2026-02
machinery — Safety —
Part 7:
Specific requirements for slipform
pavers and related machines
Machines mobiles pour la construction de routes — Sécurité —
Partie 7: Prescriptions spécifiques pour machines à coffrage
glissant et machines associées
Reference number
© ISO 2026
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Published in Switzerland
ii
Contents Page
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 . 3
4.1 General .3
4.1.1 Context .3
4.1.2 Specific relation to ISO 20500-1 .3
4.2 Visibility .3
4.2.1 General .3
4.2.2 Visibility performance criteria .3
4.2.3 Visibility performance criteria for the front boundary FB.5
4.3 Operation and handling .5
4.4 Operator's station .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 . 7
6 Information for use — Operator's manual . 8
Annex A (informative) Noise test code for slipform pavers and related machines . 9
Annex B (informative) Examples of slipform pavers .15
Annex C (informative) Examples of related machines . 17
Annex D (informative) List of significant hazards . 19
Bibliography .22

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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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 document should be noted. This document was drafted in accordance with the editorial rules of the
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This document was prepared by Technical Committee ISO/TC 195, Building construction machinery and
equipment.
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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.
v
International Standard ISO 20500-7:2026(en)
Mobile road construction machinery — Safety —
Part 7:
Specific requirements for slipform pavers and related
machines
1 Scope
This document, together with ISO 20500-1:2026, deals with all significant hazards, hazardous situations and
events relevant to slipform pavers and related machines when used as intended and under the conditions
of misuse which are reasonably foreseeable by the manufacturer (see Annex D) 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 20500-1:2026. This document does not repeat the requirements of ISO 20500-1:2026, but supplements
or modifies the requirements for slipform pavers and related machines.
Lightning as a significant and relevant hazard is not covered in this document.
This document is not applicable to slipform pavers and related machines 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 3744:2025, Acoustics — Determination of sound power levels of noise sources using sound pressure —
Engineering methods for an essentially free field over a reflecting plane
ISO 5006:2017, Earth-moving machinery — Operator's field of view — Test method and performance criteria
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 20500-1:2026, 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 20500-1:2026 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
slipform paver
machine intended to move and to guide a mould that extrudes pre-vibrated concrete to make continuous
works, such as barriers, curb and gutter, parapet, glare-screen, variable height median barrier, pavements,
or canal ditches
Note 1 to entry: See Figures B.1 and B.2.
3.2
texture curing machine
machine that gives freshly laid concrete surfaces the desired surface texture by applying a texturing device
and sprays a dispersion on the concrete surface to prevent premature drying
Note 1 to entry: See Figure C.1.
Note 2 to entry: A texturing device is for example a broom, a jute garment or other foils.
3.3
concrete placer/spreader
self-propelled machine receiving material to place it into a paving lane and spread it at a defined height
Note 1 to entry: See Figure C.2.
3.4
trimmer
power-driven axially symmetrical body on which the trimming tools are fitted and which rotates during the
trimming operation
Note 1 to entry: Trimmers are used to prepare the surface in front of the offset mould.
3.5
concrete mix distributor
spreader auger or diverter plough placed in front of the mould of a slipform paver (3.1) with road mould to
spread concrete mix evenly before it enters the mould
3.6
tie bar inserter
TBI
device which drives the tie bars into the concrete mix during the paving process
Note 1 to entry: See Figure B.3.
Note 2 to entry: There are several locations for tie bar inserters: centreline, edge of pavement and shoulder line.
3.7
dowel bar inserter
DBI
device which places multiple load-transfer dowel bars (transverse contraction joint) in the freshly paved
concrete
Note 1 to entry: See Figure B.3.
Note 2 to entry: This device is located at the rear of the mould, or on the lateral formwork, or in the mould structure
itself.
4 Safety requirements and/or protective/risk reduction measures
4.1 General
4.1.1 Context
Slipform pavers and related machines 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
Slipform pavers and related machines shall conform to the requirements of ISO 20500-1:2026, as far as not
modified or replaced by the requirements of this document.
4.2 Visibility
4.2.1 General
ISO 20500-1:2026, 4.2.1 does not apply.
Slipform pavers and related machines shall meet the following requirements:
— the visibility test shall follow the principles described in ISO 5006:2017;
— for ride-on machines with a standing operator, ISO 20500-1:2026, Annex G shall apply additionally.
4.2.2 Visibility performance criteria
The machine meets the requirements of this document if the measurement results when tested using the
setup as shown in Figure 1, show no maskings or maskings smaller than or equal to the performance criteria
with direct or indirect view as specified in 4.2.3.
a) FB (side view) for offset slipform paver b) FB (side view) for inset slipform paver

c) FB (top view) for offset slipform paver d) FB (top view) for inset slipform paver
e) FB (side view) for texture curing machines f) FB (side view) for concrete place/spreader
g) FB (top view) for texture curing machines h) FB (side view) for concrete place/spreader

Key
1 front boundary (FB)
L gap in the FB under the conveyor or auger (no requirements, width of the conveyor or auger + max. 150 mm on each
side)
L distance from the machine front to the FB (1 m)
L extension of the FB to the side of the machine (1 m on each side)
Figure 1 — Setup of machines
4.2.3 Visibility performance criteria for the front boundary FB
The machine meets the requirements of this document if the measurement results show no maskings or
maskings smaller or equal to 300 mm when evaluated using the eye spacing of 405 mm and using an FB test
object height of 1,5 m.
NOTE The 12 m circle and the rectangular boundary (RB) according to ISO 5006:2017 are not relevant for
slipform pavers and related machines.
4.3 Operation and handling
ISO 20500-1:2026, 4.3 applies with the following exception:
ISO 20500-1:2026, 4.3.2.2 does not apply for slipform pavers and related machines.
4.4 Operator's station
ISO 20500-1:2026, 4.4 applies with the following exception:
ISO 20500-1:2026, 4.4.2, first paragraph, does not apply for slipform pavers and related machines.
4.5 Access systems to operator's station and to maintenance points
ISO 20500-1:2026, 4.9 applies with the following exception and addition:
— the height of the first step for access to the operator's position can be exceeded in some machine modes
which do not need any access or egress from the operator's station (e.g. in maintenance mode);
— provisions shall be made to minimize hazards if wheels and tracks are in the vicinity of the operator's
station, operator's places and/or in the access areas.
4.6 Protection
ISO 20500-1:2026, 4.10 applies with the following addition:
— it shall be possible to stop concrete mix distributors even when they are operated in automatic mode;
— dowel bar inserters shall be equipped with means (e.g. positive interlock mechanisms) to prevent
horizontal and/or vertical movement during clearing dowel bar jams;
— tie bar inserters shall be equipped with means (e.g. positive interlock mechanisms) to prevent movement
during clearing tie bar jams.
NOTE DBI and TBI for slipform pavers with road mould are equipped with a bar feeding mechanism that can be
subject to on-the-fly maintenance operations.
4.7 Signal devices and warning signs
ISO 20500-1:2026, 4.15 applies with the following addition:

— a legible and indelible warning sign (see e.g. ISO 9244:2008, Figure C.22) shall be applied on the outer
side of the protective devices, located around the trimmer;
— (a) legible and indelible warning sign(s) indicating potential hazards created by the concrete mix
distributor shall be applied at the front of the slipform paver or concrete placer/spreader near the
concrete mix distributors, see e.g. ISO 9244:2008/Amd 1:2016, Figure C.1, Figure C.5 c) or Figure C.26.
4.8 Electro-magnetic compatibility (EMC)
ISO 20500-1:2026, 4.18 applies with the following addition:
The antenna shall be located successively on the left- and right-hand sides of the slipform paver or texture
curing machine, with the antenna parallel to the plane of the longitudinal symmetry of the machine and in
line with the operator's position.
4.9 Noise
ISO 20500-1:2026, 4.19 applies with the following addition:
For the determination of the noise emission values, Annex A shall apply to slipform pavers and related
machines.
For slipform pavers and related machines, the main sources of noise are the engine, the hydraulic components,
the cooling system, and the working process (e.g. compaction by vibration, spreading operation).
4.10 Conveyors
ISO 20500-1:2026, 4.10.2 applies with the following addition:
The screw conveyor hopper shall be guarded
— either according to Table 1, or
— with a mesh width of maximum 260 mm× 220 mm and with an additional distance guard (see Figure B.4).
These distance guards shall provide a distance to the mesh of the hopper guard of 500 mm or more and
h ≥ 180 mm.
NOTE The hopper walls can be considered as distance guards.
The minimum clearance (distance) between the mesh and the auger shall be 50 mm.
Table 1 — Hopper guards
Dimensions in millimetres
Grill-type guard – unidirec- Grill-type guard - mesh type
tional type
a c b c
a h b h
70 200 80 × 80 180
35 100 70 × 70 150
40 × 40 90
a
slot width (see Figure 3).
b
mesh width (see Figure 2).
c
minimum distance from guard to pinch point between auger and
hopper wall.
Key
b maximum permissible mesh width in mm
Figure 2 — Grill-type guard, mesh type
Key
a maximum permissible clearance between rods in mm
Figure 3 — Grill-type guard, unidirectional type
ISO 20500-1:2026, 4.8.4 applies with the following additions.
— An audible and/or visual signal (e.g. horn, flashlight) shall be activated when the folding conveyor of a
concrete placer/spreader folds in or out.
— The controls for folding the conveyor of a concrete placer/spreader shall be located outside the hazard
zone with visibility to the folding area of the conveyor.
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 2 applies in addition to ISO 20500-1:2026, Table 2.
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/sub Title a) b) c) d) e)
clause n
...