oSIST prEN 10369-2:2019

Prestressing steels - Protected and sheathed strands for prestressing - Part 2: Sliding strands

This document specifies the specific requirements for sliding protected and sheathed strands (type S).
The general requirements for protected and sheathed high strength steel strands are given in prEN 10369-1.

Spannstähle - Geschützte und gehüllte Litzen für Vorspannen - Teil 2: Schiebbare Litzen

Dieses Dokument legt spezifische Anforderungen an geschützte und gehüllte schiebbare Litzen (Typ S) fest.
Allgemeine Anforderungen an geschützte und gehüllte schiebbare Litzen sind in prEN 10369-1 enthalten.

Aciers de précontrainte - Torons de précontrainte protégés et gainés - Partie 2 : Torons coulissants

Le présent document spécifie les exigences applicables aux torons protégés gainés coulissants (type S).
Les exigences générales relatives aux torons en acier à haute résistance protégés gainés sont fournies par le prEN 10369-1.

Prednapeta jekla - Zaščitena in obložena vlakna za prednapenjanje - 2. del: Drsne žice

General Information

• Status: Not Published
• Public Enquiry End Date: 31-Aug-2019
• ICS: 77.080.20 - Steels
• Technical Committee: IFEK - Ferrous metals
• Current Stage: 98 - Abandoned project (Adopted Project)
• Start Date: 13-May-2024
• Due Date: 18-May-2024
• Completion Date: 13-May-2024
• Ref Project: prEN 10369-2 - Prestressing steels - Protected and sheathed strands for prestressing - Part 2: Sliding strands

Overview

oSIST prEN 10369-2:2019 is a draft European standard developed by the Slovenian Institute for Standardization (SIST) and the European Committee for Standardization (CEN). This document establishes the specific requirements for sliding protected and sheathed strands (type S) used in prestressing steel applications. These high strength steel strands are designed for use in concrete structures, providing enhanced corrosion protection and mechanical properties through the application of a protective grease layer and an external sheath. The requirements in this part are to be considered in conjunction with the general requirements found in prEN 10369-1.

Key Topics

Specific Focus on Sliding Strands

• Type S Strands: These are non-adherent, sliding, protected, and sheathed high strength steel strands, engineered to allow movement within the sheath during prestressing operations.
• Classification and Designation: Strands are classified as special non-alloy steels according to EN 10020. The designation is consistent with prEN 10369-1, with the symbol 'S' for sliding types.
• Dimensions and Tolerances: Includes detailed requirements for strand overall diameter and sheath thickness classes (ranging from 1.0 mm to 2.5 mm).
• Material and Sheath Properties: Specifies minimum mechanical requirements for the sheath, grease mass per metre, water tightness, impact resistance, and color stability.
• Manufacturing: Mandatory adherence to the processes and quality controls outlined in prEN 10369-1.

Performance Criteria

• Durability and Protection: Ensures high performance in terms of corrosion resistance, mechanical protection, and the ability to slide smoothly, reducing friction losses during prestressing.
• Testing Requirements: Mechanical properties, watertightness, and impact resistance must be verified through standardized methods (such as EN ISO 527-2).

Applications

Sliding protected and sheathed strands (type S) are crucial in modern prestressed concrete construction, offering practical advantages where post-tensioned systems require high reliability and long-term durability. Primary applications include:

• Bridges: For post-tensioned beams and deck slabs where corrosion protection and minimal friction are essential.
• Building Structures: High-rise buildings, parking garages, and industrial floors that rely on prestressed concrete for structural efficiency.
• Infrastructure Projects: Tunnels, water tanks, and silos, where environmental exposure demands superior corrosion resistance.

The sliding capability of the strands within their sheath facilitates accurate tensioning, enables the use of longer tendons, and supports design flexibility across diverse construction environments.

Related Standards

The requirements in oSIST prEN 10369-2:2019 reference and complement several related European and international standards, including:

• prEN 10369-1:2019 - General requirements for protected and sheathed high strength steel strands for prestressing.
• EN ISO 527-2 - Methods for determining the tensile properties of plastics, relevant for testing sheath material.
• EN 10020 - Steel classification standards.
• EN 10138 series - Specifications for prestressing steels.
• EN 10337 - Additional standards covering galvanised prestressing steel strands.

Practical Value

Implementing oSIST prEN 10369-2:2019 ensures the reliability and longevity of prestressed concrete structures by mandating robust protection for sliding strands. Construction professionals benefit from standardized testing, performance criteria, and unambiguous identification and classification, leading to safer, more durable infrastructure and compliance with European best practices for prestressing steels.

Keywords: prestressing steels, sliding strands, protected and sheathed strands, high strength steel, prEN 10369-2, corrosion protection, post-tensioning, standardization, European standard, construction.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2019
Prednapeta jekla - Zaščitena in obložena vlakna za prednapenjanje - 2. del: Drsne
žice
Prestressing steels - Protected and sheathed strands for prestressing - Part 2: Sliding
strands
Spannstähle - Geschützte und gehüllte Litzen für Vorspannen - Teil 2: Schiebbare Litzen
Aciers de précontrainte - Torons de précontrainte protégés et gainés - Partie 2 : Torons
coulissants
Ta slovenski standard je istoveten z: prEN 10369-2
ICS:
77.080.20 Jekla Steels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2019
ICS 77.140.15
English Version
Prestressing steels - Protected and sheathed strands for
prestressing - Part 2: Sliding strands
Aciers de précontrainte - Torons de précontrainte Spannstähle - Geschützte und gehüllte Litzen für
protégés et gainés - Partie 2 : Torons coulissants Vorspannen - Teil 2: Schiebbare Litzen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 459/SC 4.
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 CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey 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

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 10369-2:2019 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Classification and designation . 4
4.1 Classification . 4
4.2 Designation. 4
5 Manufacturing process . 5
6 Requirements for materials used for sliding protected and sheathed strands. 5
7 Requirements for sliding protected and sheathed strands . 5
7.1 Overall diameter. 5
7.2 Straightness . 5
7.3 Mass of the protection product . 5
7.4 Sheath . 5

European foreword
This document (prEN 10369-2:2019) has been prepared by Technical Committee CEN/TC 459/SC 4
“Concrete reinforcing and prestressing steels”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
prEN 10369 consists of three parts under the general title “Prestressing steels — Protected and
sheathed strands for prestressing”:
— Part 1: General requirements
— Part 2: Sliding strands
— Part 3: Adherent strands
1 Scope
This document specifies the specific requirements for sliding protected and sheathed strands (type S).
The general requirements for protected and sheathed high strength steel strands are given in
prEN 10369-1.
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. F
...