BS EN 13256:2016

European foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and abbreviations
4 Required characteristics and corresponding
  methods of test
5 Assessment and verification of constancy
  of performance (AVCP)
6 Marking
Annex A (normative) - Factory production control
Annex B (normative) - Durability aspects
Annex C (informative) - Guidelines for the
        selection of the appropriate standard
        in a specific application
Annex D (informative) - Significant technical
        changes to superseded editions of this
        standard
Annex ZA (informative) - Clauses of this European
         Standard addressing the provisions of the
         EU Construction Products Regulation
Bibliography

Defines the relevant characteristics of geotextiles and geotextile-related products used in the construction of tunnels and underground structures, and the appropriate test methods to determine these characteristics.

This European Standard specifies the relevant characteristics of geotextiles and geotextile-related products used in the construction of tunnels and underground structures, and the appropriate test methods to determine these characteristics. The intended use of these geotextiles or geotextile-related products is to protect geosynthetic barriers used in tunnels and underground structures. This European Standard is not applicable to geosynthetic barriers, as defined in ENISO10318‑1 . This European Standard provides for the assessment and verification of constancy of performance of the product to this European Standard and for factory production control procedures. Particular application cases may contain requirements regarding additional properties and— preferably standardized— test methods, if they are technically relevant. This European Standard may be used to derive design values by taking into account factors within the context of the definitions given in EN1997‑1 (Eurocode 7), e.g. factors of safety. The design life of the product should be determined, since its function may be temporary, as a construction expediency, or permanent, for the lifetime of the structure.