prEN 15383

SLOVENSKI oSIST prEN 15383:2005

PREDSTANDARD
december 2005
Cevni sistemi iz polimernih materialov za odpadno vodo – S steklenimi vlakni
okrepljeni duromerni materiali (GRP), ki temeljijo na nenasičeni poliestrski
smoli (UP) – Vstopni in revizijski jaški
Plastics piping systems for drainage and sewerage - Glass-reinforced
thermosetting plastics (GRP) based on polyester resin (UP) - Manholes and
inspection chambers
ICS 23.040.20; 91.140.80 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD
DRAFT
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2005
ICS
English Version
Plastics piping systems for drainage and sewerage - Glass-
reinforced thermosetting plastics (GRP) based on polyester
resin (UP) - Manholes and inspection chambers
Systèmes de canalisations en plastiques pour les
branchements et collecteurs d'assainissement - Plastiques
thermodurcissables renforcés de verre (PRV) à base de
résine de polyester (UP) - Regards et boîtes d'inspection et
de branchement
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 155.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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 Management Centre has the same
status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15383:2005: E
worldwide for CEN national Members.

Contents
Foreword. 4
Introduction . 4
1 Scope. 5
2 Normative references . 5
3 Terms and definitions. 6
3.1 Manholes and inspection chambers . 6
3.2 Prefabricated unit. 8
3.3 Components of the base unit.10
3.4 Component of the side entry manhole or inspection chamber . 11
3.5 Units forming the capping structure . 11
3.6 Slabs and other elements used as reducing unit. 12
3.7 Sizes and nominal values . 12
3.8 Performance. 13
3.9 Other . 14
4 Symbols . 15
5 Classification. 17
6 Place of installation . 17
7 Material specification and properties . 18
7.1 Chamber and shaft units. 18
7.2 Pipes, fittings and supporting material. 19
7.3 Benching and invert . 19
7.4 Slabs and adjusting unit. 20
7.5 Manhole top . 20
7.6 Joints. 20
7.7 Manhole steps and ladders. 20
8 Types of manholes and inspection chambers. 20
9 General characteristics . 26
9.1 National design and safety regulations. 26
9.2 General composition . 26
9.3 Serviceability and durability . 26
9.4 Design service temperature . 26
9.5 General appearance and finish. 26
9.6 Flexible connection . 27
9.7 Test conditions. 27
10 Geometrical characteristics. 27
10.1 General . 27
10.2 Vertical cylindrical components. 27
10.3 Geometry of cylindrical components. 30
10.4 Slabs . 30
10.5 Connections . 31
10.6 Benching and inverts in base units . 31
10.7 Manhole steps and ladders. 32
11 Mechanical characteristic requirements .32
12 Performance requirements .34
13 Conformity evaluation.36
13.1 General .36
13.2 Product evaluation procedures.36
14 Marking .36
Annex A (informative) Guidance for the assessment of conformity.38
A.1 GRP components .38
A.2 Non-GRP components.41
Annex B (normative) Test method for connections to sewer.42
B.1 Scope.42
B.2 Connection using an integrated pipe element .42
B.3 Connections using an integrated pipe coupling.42
Annex C (normative) Negative pressure test on units .44
C.1 Scope.44
C.2 Principle .44
C.3 Apparatus .44
C.4 Test pieces .44
C.5 Procedure .45
Annex D (informative) Test method for gas-tightness of inspection chambers and manholes 46
D.1 Scope.46
D.2 Principle .46
D.3 Apparatus .46
D.4 Test pieces .46
D.5 Procedure .47
Annex E (normative) Initial specific longitudinal compressive strength – Test method.48
E.1 Scope.48
E.2 Number of the test pieces.48
E.3 Dimension of the test pieces .48
E.4 Test.49
E.5 Test report .49
Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU
Construction Products Directive .50
ZA.1 Scope and relevant characteristics.50
ZA.2 Procedure(s) for the attestation of conformity of GRP manholes and inspection chambers. .51
ZA.3 CE marking and labeling.53
Bibliography.55

Foreword
This document (prEN 15383:2005) has been prepared by Technical Committee CEN/TC 155 "Plastics piping
systems and ducting systems", the secretariat of which is held by NEN.
This document is currently submitted to the CEN Enquiry.
This European Standard is a System Standard for manholes and inspection chambers made of plastics piping
systems using glass-reinforced thermosetting plastics (GRP) based on unsaturated polyester resin (UP), for
drainage and sewerage. This European Standard has been prepared under a mandate given to CEN by the
European Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s).
For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.
This European Standard includes three informative and three normative annexes:
 ANNEX A: Guidance for the assessment of conformity (informative);
 ANNEX B: Test method for connections to sewer (normative);
 ANNEX C: Negative pressure test on units (normative);
 ANNEX D: Test method for gas-tightness of inspection chambers and manholes (informative);
 ANNEX E: Initial specific longitudinal compressive strength – test method (normative);
 ANNEX ZA: Clauses of this European Standard addressing the provisions of the EU Construction
Products Directive (informative).
[1]
NOTE Separate ENV standard prCEN/TS 14632 , extended with annex A, covers the assessment of conformity.

Introduction
The performance of a sewerage network constructed with these products depends not only on the properties
of the product as required by this standard but also on the design and construction of the network as a whole
in relation to the environment and conditions of use.
1 Scope
This standard specifies the requirements for GRP-UP manholes and inspection chambers, with circular
chamber and shaft sections, for use within a drain or sewer system under gravity or at low head of pressure,
limited by non-pressure classification as defined in Clause 3.
This European standard covers components to be used in systems for the conveyance of one or more of the
following fluids:
 domestic wastewater;
 surface water;
 other waste waters (e.g. trade effluent).
Products covered by this standard are either complete manholes and inspection chambers or individual units
for the construction of manholes and inspection chambers, with an intended use in buried applications.
It specifies definitions, material specification and properties, types, characteristics, requirements, test methods,
marking.
NOTE Complete manholes or prefabricated units can also be used for other purposes such as pumping stations,
manholes for pipeline-equipment, backdrop manholes, ramp manholes, combined sewer overflow, storm water overflow,
items of drainage, housings for waste water treatment systems, items for sewerage treatment or sewerage disposal, when
corresponding additional requirements according to the relevant European Standards are fulfilled. If used in drinking water
systems, the requirements of the relevant standards for products in contact with drinking water shall apply to the
components in contact with drinking water.
2 Normative references
The following referenced documents are indispensable for the application 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 124:1994, Gully tops and manhole tops for vehicular and pedestrian areas — Design requirements, type
testing, marking, quality control.
EN 295-1, Vitrified clay pipes and fittings and pipe joints for drains and sewers — Part 1: Requirements.
EN 476:1997, General requirements for components used in discharge pipes, drains and sewers for gravity
systems.
EN 545, Ductile iron pipes, fittings, accessories and their joints for water supply — Requirements and test
methods.
EN 598, Ductile iron pipes, fittings, accessories and their joints for sewerage application — Requirements and
test methods.
EN 1119, Plastics piping systems — Joints for glass-reinforced thermosetting plastics (GRP) pipes and
fittings — Test methods for leak tightness and resistance to damage of flexible and reduced-articulation joints.
EN 1120, Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes and fittings —
Determination of the resistance to chemical attack from the inside of a section in a deflected condition.
EN 1228, Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes — Determination of
initial specific ring stiffness.
EN 1394, Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes — Determination of
the apparent initial circumferential tensile strength.
EN 1610:1997, Construction and testing of drains and sewers.
EN 1916, Concrete pipes and fitting, unreinforced, steel fibre and reinforced.
EN 1997:2002, Concrete manholes and inspection chambers, unreinforced, steel fibre and reinforced.
EN 13101, Steps for underground man entry chambers — Requirements, marking, testing and evaluation of
conformity.
prEN 14364:2002, Plastics piping systems for drainage and sewerage with or without pressure — Glass-
reinforced thermosetting plastics (GRP) based on unsaturated polyester resin (UP).
EN 14396, Fixed ladders for manholes.
EN ISO 604, Plastics — Determination of compressive properties (ISO 604:2002).
EN ISO 3126, Plastics piping systems — Plastics components — Determination of dimensions
(ISO 3126:2005).
EN ISO 14125, Fibre-reinforced plastic composites — Determination of flexural properties (ISO 14125:1998).
3 Terms and definitions
For the purposes of this European standard, the following term, definitions and abbreviations apply.
3.1 Manholes and inspection chambers
3.1.1
manhole
drainage and sewerage fitting which is used for connecting drainage or sewerage installations and/or for
changing the direction and/or level of drainage/sewerage runs. A manhole terminates at ground level, which
permits the introduction of cleaning, inspection and test equipment and the removal of debris and it provides
access for personnel
3.1.2
inspection chamber
drainage and sewerage fitting as a manhole, but it does not provide access for personnel
3.1.3
unit
prefabricated structure, ready for assembling with other units on the construction site and forming the
complete manhole or inspection chamber
3.1.4
component
part of a unit and is always factory assembled to form the unit
3.1.5
fitting
part of a drain or sewer system other than pipes
3.1.6
closed access fitting
manhole or inspection chamber that permits entry into the system for rodding or inspection and that has a
sealed cover
3.1.7
saddle
fitting that enables a branch connection to be made in buried drainage/sewerage systems of larger diameter
by cutting a hole in the pipe and is retained in position by lamination or glue
3.1.8
rodding point
component of an inspection chamber installed at ground level and fitted with a removable cover that permits
the introduction of equipment for inspection and the clearance of blockages
3.1.9
rodding tee
component of an inspection chamber installed in a drainage or sewerage system that connects to a rodding
point at ground level by means of a vertical shaft that permits the introduction of equipment for the clearance
of blockages, and also equipment for the inspection of the connecting pipe work in one or more directions
3.1.10
backdrop manhole
manhole with a connection, by means of a vertical pipe, at or just above invert, from a drain or sewer at a
higher level
3.2 Prefabricated unit
Key
A is the adjusting unit
B is the base unit
C is the cover slab
D is the chamber unit
R is the reducing slab
S is the shaft unit
T is the cone
U is the side entry manhole or inspection chamber
Figure 1 — Typical structures
3.2.1
chamber
space with maximum diameter, inside a manhole or an inspection chamber, limited by base unit, the cover or
reducing slab or cone and the chamber unit
3.2.2
shaft
space above the chamber inside a manhole or an inspection chamber, with uniform diameter smaller than the
chamber, limited by the cover slab or cone and the shaft unit
3.2.3
base unit (see Figure 1 – unit B)
bottom section in a manhole, with or without benching, in which connections to the drain or sewer system, with
or without changes in direction and/or level occur
3.2.4
chamber unit (see Figure 1– unit D)
vertical hollow component of uniform cross-section. Flexible joints to accommodate connecting pipelines may
be provided as for a base unit
3.2.5
landing slab
intermediate floor in the form of a slab built between the different ladders for reasons of safety and which has
suitable means of connection the adjacent chamber units
3.2.6
side entry manhole or inspection chamber (see Figure 1 – unit U)
sewer pipe or fitting on which a centric or tangential saddle component is fixed for the connection to the
chamber unit, shaft unit or to the capping structure
3.2.7
shaft unit (see Figure 1 – unit S)
section providing access to the chamber in deep manholes
3.2.8
capping structure
structure on top of base unit, chamber unit or shaft unit composed of:
 a manhole top, conforming to EN 124:1994 or with national safety regulations;
 adjusting unit (see Figure 1 – unit A), compatible with the cone or cover slab and with the manhole top
and secured against horizontal displacement;
 a cone (see Figure 1 – unit T) or a cover slab (see Figure 1 – unit C), compatible with the base unit,
chamber unit or shaft unit and secured against horizontal displacement
3.2.9
reducing unit
cone (see Figure 1 – unit T) or reducing slab (see Figure 1 – unit R).
3.2.10
prefabricated complete manhole or inspection chamber
manhole or inspection chamber assembled on the construction site, with all required units from bottom to
cover slab, ready for fitting into the sewerage system. Jointing material between units shall be supplied by the
manufacturer of prefabricated manhole or inspection chamber
3.3 Components of the base unit

Key
1 is the benching
2 is the invert
3 is the base slab
Figure 2 — Base Unit
3.3.1
base slab (see Figure 2 – item 1)
component forming the bottom of the chamber
3.3.2
invert (see Figure 2 – item 2)
lowest point of the internal surface of the benching in the base unit of the manhole and inspection chamber
between sewer connections
3.3.3
benching (see Figure 2 – item 3)
smooth surface forming the bottom of the base unit
3.3.4
connection to sewer (see Figure 8)
short length of pipe or a joint fitting, ready to connect sewer pipes and which is securely fixed into the wall of a
chamber or the shaft unit
3.4 Component of the side entry manhole or inspection chamber

Key
4 is the saddle element
d is the external diameter (see 3.7.1)
e
h is the height of saddle element, expressed in millimetre (mm)

up
h is the effective height of connecting ring, expressed in millimetre (mm)

cr
Figure 3 — Side entry manhole or inspection chamber
3.4.1
saddle element (see Figure 3 – item 4)
piece of chamber, shaft or a coupling, fixed on the pipe, and making the connection with the chamber unit or
shaft unit
3.5 Units forming the capping structure

Key:
G.L. is the ground level
5 is the adjusting unit
6 is the manhole top
7 is the cover slab
Figure 4 — Capping structure
3.5.1
adjusting unit (see Figure 4 – item 5)
component situated above the cover slab, without a joint or installed step, to adjust the total height of a
structure and/or to accommodate an appropriate frame and cover
3.5.2
manhole top (see Figure 4 – item 6)
part of a manhole and inspection chamber, consisting of a frame and a cover and/or a grating. It provides a
load bearing closure to a manhole
3.5.2.1
cover
movable part(s) of a manhole-top which cover(s) the manhole or inspection chamber
3.5.2.2
grating
movable part(s) of a manhole-top which permits the passage of water through itself to the manhole or
inspection chamber
3.5.2.3
frame
fixed part of a manhole-top, which receives and supports a grating and/or a cover
3.6 Slabs and other elements used as reducing unit
3.6.1
reducing slab (see Figure 1 – unit R)
unit that provides a connection between the chamber unit and shaft unit with an opening for access and
suitable means of connection to the adjacent units. The opening is located eccentrically or concentrically
3.6.2
cover slab (see Figure 1 – unit C and Figure 4 – item 7)
unit forming the horizontal roof of a manhole or inspection chamber, having an access opening, situated
immediately under the manhole-top or adjusting ring, and having suitable means of connection to the adjacent
units. The opening is located eccentrically or concentrically
3.6.3
load-transmitting slab (see Figure 14)
slab that transmits the traffic and other superimposed loads, applied on the slab, to the load bearing chamber.
This slab is usual designed as a cover slab
3.6.4
load-distributing slab (see Figure 15, Figure 16 and Figure 17)
slab that distributes the traffic and other superimposed loads, applied to the slab, to the surrounding soil
thereby avoiding loading the shaft unit or chamber unit
3.6.5
cone (see Figure 1 – item T)
shaft ring with variable section. It forms the sloping roof of a circular base unit or shaft unit, thereby reducing
this unit to the size of the shaft unit or the shaft neck. It can be eccentric or concentric. Such unit shall be
provided with appropriate means for connection to the adjoining units
3.6.6
shaft neck
cylindrical part connected on the upper part of a cone
3.7 Sizes and nominal values
3.7.1
external diameter
d
e
mean external diameter of the pipe barrel at any cross section, expressed in millimetres (mm)
3.7.2
internal diameter
d
i
external diameter minus twice the wall thickness [see equation (1)], expressed in millimetres (mm)
d = d – 2 × e …(1)
i e
where:
d is the external diameter, expressed in millimetres (mm);
e
e is the wall thickness of the pipe, expressed in millimetres (mm)
3.7.3
nominal size
DN
alphanumerical designation of size of component, which is a convenient integer approximately equal to a
manufacturing dimension in mm. This can apply to either the internal diameter (DN/ID) or the external
diameter (DN/OD), when expressed in millimetres
NOTE The designation for reference or marking purposes consists of the letters DN plus a number.
3.7.4
nominal stiffness
SN
alphanumeric designation for stiffness classification purposes, which has the same numerical value as the
minimum initial specific ring stiffness value required as determined in prEN 14364:2002, when expressed in
newtons per square meter (N/m )
NOTE The designation for reference or marking purposes consists of the letters SN plus a number.
3.7.5
nominal pressure
PN
alphanumeric designation for pressure classification purposes, which has a numerical value equal to the
resistance of a component of a piping system to internal pressure, when expressed in bars
NOTE The designation for reference or marking purposes consists of the letters PN plus a number.
3.8 Performance
3.8.1
pedestrian area
area reserved for pedestrians and only occasionally open to vehicular traffic for delivery, cleaning purposes or
in emergency
3.8.2
pedestrian street
area where vehicular traffic is prohibited during certain periods (e.g. pedestrian areas during business hours
and vehicular traffic outside these hours)
3.8.3
traffic area
carriageways or roads (including pedestrian streets), kerbside channels, hard shoulders, parking decks and
parking areas, for all types of road vehicles according to Group 2, Group 3 and Group 4 of Clause 6
3.8.4
load bearing chamber
chamber that sustains to the required traffic-loads
3.8.5
proof load
specified test load, which a component withstands where the related requirements of the product standard are
met
3.8.6
ultimate load
load which causes failure or break
3.8.7
test temperature
temperature at which the test is expected to be carried out, expressed in degrees Celsius (°C).
3.9 Other
3.9.1
gravity system
drain or sewer system where flow is caused by the force of gravity and where the pipeline is designed
normally to operate partially full
3.9.2
non-pressure pipe or fitting
pipe or fitting subject at its top to an internal pressure not greater than 1 bar
3.9.3
pressure pipe or fitting
pipe or fitting having a nominal pressure classification which is greater than 1 bar and which is intended to be
used with the internal pressure equal to or less than its nominal pressure when expressed in bars
3.9.4
sewage
wastewater and/or surface water conveyed by a drain or sewer
3.9.5
drain
pipeline, usually underground, designed to carry wastewater and/or surface water from a source to a sewer
3.9.6
waste water
water changed by use and discharged to a drain or sewer system
3.9.7
domestic waste water
waste water discharged from kitchens, laundry rooms, lavatories, bathrooms, toilets and similar facilities
3.9.8
trade effluent
waste water discharge resulting wholly, or in part, from any industrial or commercial activity
3.9.9
septic sewage
anaerobic sewage containing sulphides
3.9.10
surface water
water from precipitation, which has not seeped into the ground and which is discharged to the drain or sewer
system directly from the ground or from exterior building surfaces
3.9.11
ground water
water present in the sub-surface strata
3.9.12
sewer system
network of pipelines and ancillary works, which conveys wastewater and/or surface water from drains to a
treatment works or other place of disposal
3.9.13
drain system
network of pipelines and ancillary works that conveys wastewater and/or surface water to a cesspool, sewer
system or other place of disposal
4 Symbols
Symbols that can be used in GRP-UP-manhole production drawings are indicated on Figure 3, Figure 5,
Figure 8, Figure 10, Figure 14, Figure 15, Figure 16, Figure 17 and Figure 20.
Key
G.L. Ground level
d External diameter of slab, expressed in

s
millimetres (mm)
d External diameter of base slab, expressed in

bs
millimetres (mm)
d External diameter of cover slab, expressed in
cs
millimetres (mm)
d Access diameter in cover slab, expressed in

ca
millimetres (mm)
d External diameter of landing slab, expressed

ls
in millimetres (mm)
d Access diameter in landing slab, expressed
la
in millimetres (mm)
d External diameter of reducing slab,

rs
expressed in millimetres (mm)
d Access diameter in reducing slab, expressed

ra
in millimetres (mm)
d External diameter of the base unit and
ec
chamber unit at any cross section, expressed
in millimetres (mm)
d External diameter of the shaft units at any
es
cross-section, expressed in millimetres (mm)
d Internal diameter of the base unit and
ic
chamber unit at any cross-section, expressed
in millimetres (mm)
d Internal diameter of shaft units at any cross-
is
section, expressed in millimetres (mm)
e Wall thickness of base unit and chamber unit
c
at any cross-section, expressed in millimetres
(mm)
e Wall thickness of shaft units at any cross
s
section, expressed in millimetres (mm)
h Internal height of manhole or inspection
chamber, expressed in millimetres (mm)
h Height from bottom to invert, expressed in
b
millimetres (mm)
h Effective height of slab, expressed in

s
millimetres (mm)
h Effective height of base slab, expressed in
bs
millimetres (mm)
h Effective height of cover slab, expressed in

cs
millimetres (mm)
h Effective height of landing slab, expressed in

ls
millimetres (mm)
h Effective height of reducing slab, expressed
rs
in millimetres (mm)
h Effective height of adjusting unit, expressed

au
in millimetres (mm)
h Height of base unit, expressed in millimetres

bu
(mm)
h , h , etc. Height of chamber unit, expressed
cu1 cu2
in millimetres (mm)
h , h , etc. Height of shaft unit, expressed in

su1 su2
millimetres (mm)
h Total height of manhole or inspection

tot
chamber, expressed in millimetres (mm)
Figure 5 — Symbols for typical deep manhole
5 Classification
Manholes and inspection chambers are divided into 3 loading classes as follows:
 Loading class I: Manholes and inspection chambers built of units that can not sustain axial compression
resulting from road vehicles in traffic areas (see 3.8.3). When used in areas of Group 2, Group 3, Group 4,
Group 5 and Group 6 (see Clause 6) a load-distributing slab shall be used (see 3.6.4).
 Loading class II: Manholes and inspection chambers built of units that sustains axial compression
resulting from road vehicles in traffic areas (see 3.8.3). When used in areas of Group 2, Group 3 and
Group 4 (see Clause 6) a load-transmitting slab shall be used (see 3.6.3).
 Loading class III: Manholes and inspection chambers built of units that shall sustain higher axial
compression than that resulting from road vehicles in traffic areas (see 3.8.3). A load-transmitting slab
shall be used (see 3.6.3).
6 Place of installation
The appropriate loading class of manhole or inspection chamber unit to be used depends upon the place of
installation. According to EN 124:1994, the various places of installation have been divided into groups
numbered from 1 to 6. Figure 6 and Figure 7 show the location of Group 1 to Group 4 in a highway
environment. Locations of Group 5 (areas imposing high wheel loads, e.g. docks, aircraft pavements) and
Group 6 (areas imposing particularly high wheel loads, e.g. aircraft pavements) relate to higher wheel loads
than those used in highway environment.

Key
G1 Group 1 - are areas which can only be used by pedestrians and pedal cyclists (see 3.8.1 and 3.8.2)
G2 Group 2 - are footways, pedestrian areas and comparable areas, car parks or car parking decks (see 3.8.1)
G3 Group 3 - area of kerbside channels of roads which when measured from the kerb edge, extends a maximum of 0,5 m into
the carriageway and a maximum of 0,2 m into the footway
G4 Group 4 - carriageways of roads (including pedestrian streets), hard shoulders and parking areas, for all types of road
vehicles (see 3.8.3)
Figure 6 — Typical highway cross-section showing the location of some installation groups
Key
G1 Group 1 - are areas, which can only be used by pedestrians and pedal cyclists (see Figure 6)
G4 Group 4 - carriage roads (see Figure 6)
G4a Group 4 - pedestrian streets
G4b Group 4 - hard shoulders
Figure 7 – Typical detail of a hard shoulder showing the location of some installation groups
A guide as to which loading class of manhole or inspection chamber unit should be used is shown in Table 1.
The selection of the appropriate loading class is the responsibility of the designer. Where there is any doubt,
the stronger loading class should be selected.
Table 1 — Load class of manhole or inspection chamber units
Place of Manhole Cover slab and adjusting unit Chamber and shaft
a a
installation top
e
Loading class Loading class
b b
Min.  Min.
Group 1 A15 All load transmitting Class I Load bearing Class I
Group 2 B125 Use group 4 Use group 4 Use group 4 Use group 4
Group 3 C250 Use group 4 Use group 4 Use group 4 Use group 4
Group 4 D400 Load transmitting Class II Load bearing Class II
c
Group 4 D400 Load distributing Class II Non load bearing Class I

d d d
Group 5 E600 Load transmitting Class III Load bearing Class III
d d c, d
Group 5 E600 Load distributing Class III Non load bearing

d d d
Group 6 F900 Load transmitting Class III Load bearing Class III
d d c, d
Group 6 F900 Load distributing Class III Non load bearing
a
According to EN 124:1994.
b
See Clause 5.
c
Base unit; chamber unit and shaft unit (see Figure 1) shall always sustain at least to Group 1.
d
To be determined by agreement between purchaser and manufacturer.
e
See 3.6.3 and 3.6.4.
7 Material specification and properties
7.1 Chamber and shaft units
Use GRP-components for chamber and shaft units (see Figure 1).
If GRP-UP pipes are used as unit or as component, they shall conform to prEN 14364:2002, unless otherwise
specified. The system designer shall specify the classification of the pipes.
GRP used for non-cylindrical components shall meet the requirements of Table 4 to Table 7. Units made of
such components shall be provided with appropriate means for connection to the adjoining units.
7.2 Pipes, fittings and supporting material
7.2.1 General
Materials such as GRP, thermoplastics, concrete, clay, grey cast iron, ductile iron, stainless steel, carbon steel,
aluminium may be used. Relevant European Standards or in absence of these ISO or local standards shall be
applied.
Pipe spools or coupling systems are used for all connections to the sewer system (see 3.3.4). Design these
pipe spools and coupling systems as to meet the joint performances of the related standard of the material to
be connected.
7.2.2 GRP pipes
Conform to prEN 14364:2002, unless otherwise specified. The system designer shall specify the classification
of the pipes.
7.2.3 Thermoplastics pipes
Materials such as polyethylene or poly(vinyl chloride) may be used. Relevant European Standards or, in
absence of these, ISO standards or otherwise local standards shall be applied.
7.2.4 Concrete pipes
When pre-cast concrete pipes are incorporated, they shall conform to EN 1916, unless otherwise specified.
The classification of the pipes shall be specified by the system designer.
7.2.5 Ductile iron pipes
When ductile iron pipes are incorporated, they shall conform to EN 545 or EN 598, unless otherwise specified.
The classification of the pipes shall be specified by the system designer.
7.2.6 Vitrified clay pipes
When vitrified clay pipes are incorporated, they shall conform to EN 295-1, unless otherwise specified. The
classification of the pipes shall be specified by the system designer.
7.2.7 Stainless steel
Unless otherwise specified, stainless steel used for components incorporated into the manhole or inspection
chamber shall conform to EN 10088. The grade used shall be specified by the system designer.
NOTE For stainless steel in contact with sewage water use at least 1.4401 (AISI 316), 1.4404 (AISI 316L), or 1.4571
(AISI 316Ti)
7.3 Benching and invert
Benching and invert shall be made of GRP-UP (see Figure 2).
The area between benching and the base slab can be filled. Recycled or foamed materials may be used.
7.4 Slabs and adjusting unit
7.4.1 Concrete
In contact with sewage and other corrosive environment HSR LA-quality (high sulphate resisting) shall be
used as to avoid ettringite formation. All concrete components can be encased in GRP for corrosion protective
purposes against acids such as biogenic sulphuric acid attack. Where GRP encasement is required for
concrete components, this shall be specified by the purchaser.
Pre-cast concrete slabs shall meet the applicable requirements of EN 1997:2002.
7.4.2 GRP
These components shall meet the requirements of Table 4 to Table 7. Units made of such components shall
be provided with appropriate means for connection to the adjoining units.
7.4.3 Protective encasement
Use by preference GRP-UP encasing.
Materials such as polyethylene or poly(vinyl chloride) may be used. Relevant European Standards or, in
absence of these, ISO standards or otherwise local standards shall be applied.
7.5 Manhole top
The production, quality and testing of the materials shall conform to EN 124:1994 (see 3.5.2).
7.6 Joints
7.6.1 Sealing ring
[2]
Use sockets or sleeves with elastomeric seals conforming to EN 681 . The sealing ring shall have no
detrimental effects on the properties of the components and shall not cause the test assembly to fail the
performance requirements. The manufacturer of the manholes and inspection chambers or the components
shall supply all the necessary sealing materials and lubricant for the erection.
7.6.2 Cemented joint
Adhesives, if required, shall be specified by the manufacturer of the joint. The joint manufacturer shall ensure
that the adhesives shall not have any detrimental effects on the components with which it is intended to be
used and shall not cause the test assembly to fail the functional requirements.
7.7 Manhole steps and ladders
Manhole steps shall conform to EN 13101. Ladders shall conform to prEN 14396 and national regulations.
8 Types of manholes and inspection chambers
Figures 8 to 19 show typical arrangements for components in GRP manholes and inspection chambers.
NOTE The figures are schematic sketches only to indicate the design. They do not necessarily represent the
manufactured components. Design should conform to national requirements and/or local practice.

Key
d external diameter of the connection to sewer (see 3.7.1)
e
d internal diameter of the connection to sewer (see 3.7.2)
i
e wall thickness of the connection to sewer (see 3.7.2)
Figure 8 – Typical manhole or inspection chamber –
Prefabricated base unit and chamber or shaft unit
NOTE For different sizes of connections to sewers use symbols d , d ,
...