ISO 18319-1:2026

International
Standard
ISO 18319-1
Second edition
Fibre-reinforced polymer (FRP)
2026-01
reinforcement for concrete
structures —
Part 1:
Specifications of FRP sheets
Renforce en polymères renforcés avec fibres (PRF) pour
structures en béton —
Partie 1: Spécifications des feuilles en PRF
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 Symbols . 1
5 Mechanical properties . 2
5.1 General .2
5.2 Guaranteed value of tensile strength .2
5.3 Characteristic value of Young’s modulus .2
5.4 Characteristic value of ultimate strain .2
6 Appearance and dimensions . 2
6.1 Appearance .2
6.2 Dimensions .2
6.2.1 Length and width .2
6.2.2 Nominal thickness .2
7 Sampling test. 3
7.1 Sampling .3
7.2 Appearance .3
7.3 Dimensions .3
7.3.1 Conditions of measurement . .3
7.3.2 Width .3
7.4 Tensile test .3
Annex A (normative) Determination of fibre mass per unit area of dry sheet . 4
Bibliography . 6

iii
Foreword
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This document was prepared by Technical Committee ISO/TC 71, Concrete, reinforced concrete and pre-
stressed concrete, Subcommittee SC 6, Non-traditional reinforcing materials for concrete structures.
This second edition cancels and replaces the first edition (ISO 18319:2015) which has been technically
revised.
The main changes are as follows:
— Characteristic value of tensile strength in Clause 5 was replaced by guaranteed value of tensile strength
provided by the material supplier.
A list of all parts in the ISO 18319 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.

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ISO 1
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