kSIST FprEN ISO 10318-2:2026

• Abstract:

  The intent of ISO 10318-2:2015 is to define property symbols, graphical symbols, and pictograms used in EN and ISO geosynthetics standards. Definitions of particular or specific symbols and pictograms terms not included in this this part of ISO 10318 can be found in the International Standards describing appropriate test methods.

• Status: Not Published
• Public Enquiry End Date: 30-Dec-2025
• ICS: 01.040.59 - Textile and leather technology (Vocabularies)
• ICS: 01.080.01 - Graphical symbols in general
• ICS: 59.080.70 - Geotextiles
• Technical Committee: ITEK - Textile and textile products
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 03-Nov-2026
• Due Date: 22-Dec-2026
• Ref Project: FprEN ISO 10318-2 - Geosynthetics - Part 2: Symbols and pictograms (ISO/FDIS 10318-2:2026)

• Revises: SIST EN ISO 10318-2:2015/A1:2018 - Geosynthetics - Part 2: Symbols and pictograms - Amendment 1 (ISO 10318-2:2015/Amd 1:2018)
• Effective Date: 08-Nov-2023
• Revises: SIST EN ISO 10318-2:2015 - Geosynthetics - Part 2: Symbols and Pictograms (ISO 10318-2:2015)
• Effective Date: 08-Nov-2023

kSIST FprEN ISO 10318-2:2026 is a SIST draft standard aligned with ISO 10318-2 for geosynthetics. It defines the property symbols, graphical symbols, and pictograms used in EN and ISO geosynthetics standards. In practice, it gives a common notation for drawings, datasheets, test reports, and product documentation.

What does kSIST FprEN ISO 10318-2:2026 specify?

kSIST FprEN ISO 10318-2:2026 specifies the symbols and pictograms used for geosynthetics. Clause 1 states that, where a particular symbol term is not covered here, users should look to the International Standards that describe the relevant test methods.

The document is organized into:

• Clause 1 - Scope
• Clause 2 - Symbols
  • 2.1 Property symbols
  • 2.2 Graphical symbols and pictograms
• Bibliography

What are the key requirements of kSIST FprEN ISO 10318-2:2026?

Property symbols

Clause 2.1.1 assigns symbols for basic physical properties: thickness, width, length, and mass per unit area. That matters because product data and test records can use one consistent symbol set instead of different local notation.

Clause 2.1.2 covers hydraulic properties, including permeability, permittivity, transmissivity, velocity index, in-plane flow capacity, flux normal to the plane, and characteristic opening size. It also gives the relationships for permittivity and transmissivity, which helps readers understand how the values are derived and what they describe in use.

Mechanical properties

Clause 2.1.3.1 defines tensile symbols for yield stress, tensile strength at a specified strain, failure stress and strength, maximum tensile stress and strength, tensile modulus, maximum joint seam strength, and joint or seam efficiency. This is important when comparing base material performance with seam or joint performance in real installations.

Clause 2.1.3.2 gives symbols for friction angle and friction interaction coefficient between soil and GSY, and between GSY and GSY. These symbols are used where interface behavior matters, for example in stability checks and lining systems.

Clause 2.1.3.3 defines load symbols for failure load, maximum tensile load, puncture force, compressive creep load, and direct shear load. Clause 2.1.3.4 adds the symbol for hole diameter from the cone drop test. Together, these symbols support consistent reporting of mechanical test results and damage-related observations.

Graphical symbols and pictograms

Clause 2.2 provides pictograms for product families, functions, and applications. That lets designers, manufacturers, and specifiers use the same visual language in drawings, labels, and technical literature.

What terms does kSIST FprEN ISO 10318-2:2026 define?

• GTX - the symbol used for a geotextile.
• GBR - the symbol used for a geosynthetic barrier.
• GBR-C - the symbol used for a clay geosynthetic barrier.
• GGR - the symbol used for a geogrid.
• GCO - the symbol used for a geocomposite.
• GNT - the symbol used for a geonet.
• GSY - the generic geosynthetic reference used in interface terms such as soil-GSY and GSY-GSY friction.

Who uses kSIST FprEN ISO 10318-2:2026?

Geosynthetics designers and manufacturers use this standard to label products and properties consistently. Testing laboratories use it when reporting thickness, hydraulic, tensile, puncture, friction, and shear results.

Quality managers, technical writers, and buyers use it to read datasheets and compare products without ambiguity. It is relevant across reservoirs and dams, canals, transportation infrastructure and roads, railways, tunnels and underground structures, coastal erosion control, drainage systems, foundations and retaining walls, liquid waste, solid waste, asphalt reinforcement, waterproofing of underground structures, and secondary containment.

What changed in kSIST FprEN ISO 10318-2:2026 from the previous edition?

This third edition replaces ISO 10318-2:2015 and is technically revised.

Which standards are used with kSIST FprEN ISO 10318-2:2026?

• ISO 10318-1 - the vocabulary part of Geosynthetics; the symbol tables cite it for the underlying definitions of many properties.
• ISO 9863-1 - listed in the bibliography as the method for determining thickness at specified pressures, which supports the thickness symbol d.

The scope also points users to the standards for the relevant test methods when a specific symbol term is not covered in this part.

What does the kSIST FprEN ISO 10318-2:2026 document contain?

Clause 2.1 contains tables that map symbols to units, reference standards, and property names. These tables cover physical, hydraulic, tensile, frictional, loading, and other characteristics.

Clause 2.2 lists product symbols and pictograms for functions and applications, giving a visual language for geosynthetic product families and their uses. The hydraulic section also shows the relationships used for permittivity and transmissivity.

The bibliography identifies ISO 9863-1. Overall, the document is a symbol reference for design, testing, documentation, and communication rather than a test method itself.

SLOVENSKI STANDARD
oSIST prEN ISO 10318-2:2025
01-december-2025
Geosintetika - 2. del: Simboli in piktogrami (ISO/DIS 10318-2:2025)
Geosynthetics - Part 2: Symbols and pictograms (ISO/DIS 10318-2:2025)
Geokunststoffe - Teil 2: Symbole und Piktogramme (ISO/DIS 10318-2:2025)
Géosynthétiques - Partie 2: Symboles et pictogrammes (ISO/DIS 10318-2:2025)
Ta slovenski standard je istoveten z: prEN ISO 10318-2
ICS:
01.040.59 Tekstilna in usnjarska Textile and leather
tehnologija (Slovarji) technology (Vocabularies)
01.080.01 Grafični simboli na splošno Graphical symbols in general
59.080.70 Geotekstilije Geotextiles
oSIST prEN ISO 10318-2:2025 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 10318-2:2025
oSIST prEN ISO 10318-2:2025
DRAFT
International
Standard
ISO/DIS 10318-2
ISO/TC 221
Geosynthetics —
Secretariat: BSI
Part 2:
Voting begins on:
Symbols and pictograms 2025-10-15
Voting terminates on:
Géosynthétiques —
2026-01-07
Partie 2: Symboles et pictogrammes
ICS: 01.080.99; 59.080.70
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document has not been edited by the ISO Central Secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
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.
Reference number
ISO/DIS 10318-2:2025(en)
oSIST prEN ISO 10318-2:2025
DRAFT
ISO/DIS 10318-2:2025(en)
International
Standard
ISO/DIS 10318-2
ISO/TC 221
Geosynthetics —
Secretariat: BSI
Part 2:
Voting begins on:
Symbols and pictograms
Voting terminates on:
Géosynthétiques —
Partie 2: Symboles et pictogrammes
ICS: 01.080.99; 59.080.70
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document has not been edited by the ISO Central Secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: [phone]
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 10318-2:2025(en)
ii
oSIST prEN ISO 10318-2:2025
ISO/DIS 10318-2:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Symbols . 1
2.1 Property symbols.1
2.1.1 Physical properties.1
2.1.2 Hydraulic properties of GTX and of GTP .1
2.1.3 Mechanical properties . .2
2.2 Graphical symbols and pictograms .3
2.2.1 Products .3
2.2.2 Functions .3
2.2.3 Applications .4
Bibliography . 7

iii
oSIST prEN ISO 10318-2:2025
ISO/DIS 10318-2:2025(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Stand
...