CEN/TS 17152-4:2024

SLOVENSKI STANDARD
01-marec-2024
Cevni sistemi iz polimernih materialov, ki delujejo po težnostnem principu in so
položeni v zemljo, za transport in shranjevanje površinske vode - Zaboji za
sisteme infiltriranja, reduciranja in hrambe - 4. del: Smernice za konstrukcijsko
načrtovanje modularnih sistemov
Plastics piping systems for non-pressure underground conveyance and storage of
surface water - Boxes used for infiltration, attenuation and storage systems - Part 4:
Guidance for structural design of modular systems
Kunststoff-Rohrleitungssysteme für die drucklose unterirdische Entwässerung für Nicht-
Trinkwasser - Versickerungsblöcke zur Verwendung in Infiltrations-, Zwischenspeicher-
und Speichersystemen - Teil 4: Leitfaden für die statische Berechnung von Systemen
Ta slovenski standard je istoveten z: FprCEN/TS 17152-4
ICS:
23.040.03 Cevovodi za zunanje sisteme Pipeline and its parts for
transporta vode in njihovi deli external water conveyance
systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

FINAL DRAFT
TECHNICAL SPECIFICATION
FprCEN/TS 17152-4
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
January 2024
ICS 23.040.01
English Version
Plastics piping systems for non-pressure underground
conveyance and storage of surface water - Boxes used for
infiltration, attenuation and storage systems - Part 4:
Guidance for structural design of modular systems
Kunststoff-Rohrleitungssysteme für die drucklose
unterirdische Entwässerung für Nicht-Trinkwasser -
Versickerungsblöcke zur Verwendung in Infiltrations-,
Zwischenspeicher- und Speichersystemen - Teil 4:
Leitfaden für die statische Berechnung von Systemen

This draft Technical Specification is submitted to CEN members for Vote. It has been drawn up by the Technical Committee
CEN/TC 155.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye 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 Technical Specification. It is distributed for review and comments. It is subject to change
without notice and shall not be referred to as a Technical Specification.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. FprCEN/TS 17152-4:2024 E
worldwide for CEN national Members.

FprCEN/TS 17152-4:2024 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Symbols and abbreviations . 7
4.1 Symbols. 7
4.2 Abbreviations . 8
5 Principles of design . 9
5.1 General . 9
5.2 Limit States . 9
5.3 Low risk classifications . 10
5.4 Design and analysis steps . 10
6 Characteristic pressures . 11
6.1 Permanent characteristic vertical pressure . 11
6.2 Variable characteristic vertical pressure . 11
6.3 Permanent characteristic lateral soil pressure . 14
6.4 Variable characteristic lateral pressure from traffic . 15
6.5 Lateral variable pressure from water . 16
6.6 Cyclic loads . 16
7 Design Pressures . 16
7.1 Design vertical pressures. 16
7.2 Design lateral pressures . 16
8 Strengths . 17
8.1 Characteristic strengths . 17
8.2 Design strengths . 17
8.3 Temperature in use . 18
9 Analysis – ULS . 18
9.1 Vertical direction . 18
9.2 Lateral direction . 19
9.3 Flotation . 20
10 Serviceability Limit State (SLS) . 20
10.1 General . 20
10.2 Deflection under permanent load . 20
10.3 Deflection under short-term loads . 20
Annex A (informative) Examples of vertical pressure generated from two Load Models (LM) . 21
Bibliography. 23

FprCEN/TS 17152-4:2024 (E)
European foreword
This document (FprCEN/TS 17152-4:2024) 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 Vote on TS.
This document is supported by separate standards on test methods to which normative references are
made.
EN 17152 consists of the following parts under the general title Plastic piping systems for non-pressure
underground conveyance and storage of non-potable water – Boxes used for infiltration, attenuation and
storage systems:
— Part 1: Specifications for storm water boxes made of PP and PVC;
— Part 3: Assessment of conformity (CEN/TS);
— Part 4: Guidance for the structural design of modular systems (CEN/TS).
Recommended practices for installation are described in CEN/TR 17179 [1]
National standards for pipes and fittings for the transport of surface water are not considered to be
conflicting with this document and can thus be allowed to coexist.
FprCEN/TS 17152-4:2024 (E)
Introduction
The products covered by this document are part of surface water (previously referred to as stormwater)
management systems.
Geocellular systems are an assemblage of boxes, in one or more layers, for which the material and the
material characteristics are according to EN 17152-1. The assemblage is considered as a modular system
for the purposes of this design guidance.
The general principles of designing structures to withstand long-term loads are well established.
However, their application is generally for rigid structures such as concrete bridges, e.g. Eurocode 2
series: Design of concrete structures (EN 1992).
The behaviour of thermoplastics is more complex and the design loads which may be experienced may
be different in magnitude and action. This guidance is intended to aid the designer in determining realistic
loadings in the design of thermoplastic geocellular modular systems.
NOTE: In this guidance, the terms pressure(s) and strength will be used, corresponding to actions and
resistances in Eurocodes.
FprCEN/TS 17152-4:2024 (E)
1 Scope
This document gives guidance on the structural design of underground modular systems for infiltration,
attenuation and storage of surface water under various conditions of loading. The procedures are
explained, with the appropriate variables in the design formulae, and provides graphical information on
vehicle surcharge loadings.
These modular systems are constructed from multiple cuboid shaped thermoplastic boxes generally with
ancillary components such as inlet/outlet connectors, vents, and access/inspection provision. This
guidance is for the design of modular systems conforming to EN 17152-1.
The boxes, including integral components, are injection moulded, extruded or thermoformed
thermoplastics, manufactured from polypropylene (PP) or unplasticized poly(vinyl chloride) (PVC-U),
and are intended to be used as elements in a modular system where the manufacturer has clearly stated
in the documentation how the components are assembled to create a complete infiltration, attenuation
or storage system.
Outside the scope of this document are the following conditions:
- seismic loads,
- lateral loads from adjacent structures and embankments,
- influence of trees,
- backfill materials not according to CEN/TR 17179 [1].
Geotextile and/or geomembrane used with modular systems are outside the scope of this document.
NOTE If reference is made in this document to Eurocode standards, the conditions in a national foreword or
national annex are normally stated.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN ISO 472:2013, Plastics - Vocabulary (ISO 472:2013)
EN ISO 1043-1:2011, Plastics - Symbols and abbreviated terms - Part 1: Basic polymers and their special
characteristics (ISO 1043-1:2011)
prEN 1997-1:2022, Eurocode 7 - Geotechnical design - Part 1: General rules
EN 17152-1:2019, Plastics piping systems for non-pressure underground conveyance and storage of non-
potable water - Boxes used for infiltration, attenuation and storage systems - Part 1: Specifications for storm
water boxes made of PP and PVC-U
FprCEN/TS 17152-4:2024 (E)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 472:2013, EN ISO 1043-
1:2011, EN 17152-1:2019 and the following apply.
3.1
limit state
state beyond which the structure no longer satisfies the relevant design criteria
[SOURCE: EN 1990:2023 3.1.2.14]
3.2
ultimate limit state
ULS
state associated with collapse or other similar forms of structural failure
Note 1 to entry: Generally corresponds to the maximum load-carrying resistance of a structure or structural
member
[SOURCE: EN 1990:2023 3.1.2.15; modified – note to entry added]
3.3
serviceability limit state
SLS
state that correspond to conditions beyond which specified service requirements for a structure or
structural member are no longer met
[SOURCE: EN
...