EN 14592:2008/FprA1

Timber structures - Dowel-type fasteners - Requirements

This European Standard specifies the requirements and test methods for materials, geometry, strength, stiffness and durability aspects ( i.e corrosion protection ) of dowel-type fasteners for use in load bearing timber structures. Only dowel-type fasteners manufactured from steel are covered by this European Standard. The aim of this amendment is to correct references for the declared raw materials and to cover resin coated dowel-type fasteners.

Holzbauwerke - Stiftförmige Verbindungsmittel - Anforderungen

Structures en bois - Eléments de fixation - Exigences

Lesene konstrukcije - Paličasta vezna sredstva - Zahteve

General Information

• Status: Not Published
• ICS: 21.060.01 - Fasteners in general
• ICS: 91.080.20 - Timber structures
• Technical Committee: CEN/TC 124 - Timber structures
• Drafting Committee: CEN/TC 124/WG 4 - Connectors
• Current Stage: 5060 - Closure of Vote - Formal Approval
• Start Date: 08-Mar-2012
• Due Date: 13-Jun-2012
• Completion Date: 08-Mar-2012
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Mandate: M/112 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on structural timber products
• Ref Project: SIST EN 14592:2008/kFprA1:2012 - Timber structures - Dowel-type fasteners - Requirements

Relations

• Merged Into: EN 14592:2008+A1:2012 - Timber structures - Dowel-type fasteners - Requirements
• Effective Date: 19-Jan-2023
• Amends: EN 14592:2008 - Timber structures - Dowel-type fasteners - Requirements
• Effective Date: 02-Oct-2010

Overview

EN 14592:2008/FprA1 is a key European Standard that sets out comprehensive requirements and test methods for dowel-type fasteners made from steel, specifically intended for load-bearing timber structures. This amendment to the original 2008 standard expands the scope to include resin coated dowel fasteners and refines material references to ensure consistency and clarity. The document is overseen by CEN/TC 124 “Timber structures” and supports essential EU directives related to construction product safety and performance.

This standard is crucial for manufacturers, designers, and builders in the timber construction industry, providing validated specifications for the mechanical properties, durability, and corrosion protection of fasteners used in structural timber applications.

Key Topics

• Material Specifications
  The standard details permitted steel grades for dowels, nails, screws, staples, bolts, and nuts, specifying minimum mechanical properties and referencing various EN steel standards (EN 10025, EN 10088, EN 10263, among others). Alternative materials must demonstrate equivalent characteristics supported by testing and be declared accordingly.

• Geometry and Dimensions
  Clear requirements on nominal diameters, lengths, and threaded regions for nails and screws ensure uniformity and interchangeability. For instance, dowels must have a constant prismatic shape with circular or fluted cross-sections within defined diameter tolerances.

• Coatings and Corrosion Protection
  The amendment clarifies coating types and their functions, including:

  • Type 1: Corrosion protection (e.g., hot-dip galvanization, epoxy coatings)
  • Type 2: Lubricants to facilitate insertion
  • Type 3: Adhesive coatings that enhance withdrawal strength and aid collation
    Manufacturers must declare coatings, their purpose, and verify performance through specific testing methods.

• Testing and Compliance
  EN 14592:2008/FprA1 outlines rigorous initial type testing (ITT), including tensile strength, withdrawal resistance, and durability under simulated service conditions. Special attention is paid to the effect of coatings on mechanical performance, with protocols differentiating how coatings influence withdrawal strength.

• Definitions and Terminology
  Updated terms clarify the measurement of thread root diameter, coated length, and effective dimensions relevant for design calculations following EN 1995-1-1 (Eurocode 5).

Applications

• Load-Bearing Timber Connections
  EN 14592:2008/FprA1 fasteners are critical in assembling timber frames, glulam beams, and hybrid wood structures where dowel-type mechanical connectors provide strength and stiffness.

• Structural Timber Engineering
  Engineers rely on this standard to select appropriate fasteners with confirmed mechanical properties and corrosion resistance for both indoor and outdoor structural applications.

• Manufacturing Quality Control
  Producers utilize the standard’s factory production control requirements to ensure consistent product quality, conformity with declared material grades, and coating standards.

• Durability in Various Environments
  The corrosion protection criteria enable fastener use in different service classes, including humid or outdoor conditions, extending the service life of timber constructions.

Related Standards

• EN 1995-1-1 (Eurocode 5) – Design of timber structures, providing structural design principles and load resistance criteria directly related to fastener performance.

• EN 10088 Series – Stainless steels standards governing steel types used in manufacturing dowel fasteners.

• EN 10263 Series – Standards for steel rods and wire suitable for cold heading and extrusion in fastener production.

• EN 15737 – Test methods for torsional resistance of driving-in screws relevant for fastener mechanical testing.

• EN ISO 6892-1 – Metallic materials tensile testing procedure at room temperature used for material characterization.

By adhering to EN 14592:2008/FprA1, stakeholders in timber construction can ensure structural integrity, safety, and durability through well-defined, tested dowel-type fasteners - covering all critical aspects from raw materials through to final product performance under realistic servicing conditions.

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2012
/HVHQHNRQVWUXNFLMH3DOLþDVWDYH]QDVUHGVWYD=DKWHYH
Timber structures - Dowel-type fasteners - Requirements
Holzbauwerke - Stiftförmige Verbindungsmittel - Anforderungen
Structures en bois - Eléments de fixation - Exigences
Ta slovenski standard je istoveten z: EN 14592:2008/FprA1
ICS:
21.060.01 Vezni elementi na splošno Fasteners in general
91.080.20 Lesene konstrukcije Timber structures
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
FINAL DRAFT
EN 14592:2008
NORME EUROPÉENNE
EUROPÄISCHE NORM
FprA1
December 2011
ICS 21.060.01; 91.080.20
English Version
Timber structures - Dowel-type fasteners - Requirements
Structures en bois - Eléments de fixation - Exigences Holzbauwerke - Stiftförmige Verbindungsmittel -
Anforderungen
This draft amendment is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical Committee
CEN/TC 124.
This draft amendment A1, if approved, will modify the European Standard EN 14592:2008. If this draft becomes an amendment, CEN
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this amendment
into the relevant national standard without any alteration.

This draft amendment 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland 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

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14592:2008/FprA1:2011: E
worldwide for CEN national Members.

Contents Page
Foreword .3
Introduction .4
1 Modification to the Scope .5
2 Modifications do Clause 2, Normative references .5
3 Modifications to Clause 3, Terms and definitions .6
4 Modification to 5.3, Nominal diameter .7
5 Modifications to 6.1, Nails .7
6 Modification to 6.1.4.3, Characteristic withdrawal parameter .8
7 Modification to 6.1.5, Corrosion protection .8
8 Modification to 6.2.2, Materials .8
9 Modifications to 6.2.3, Geometry .8
10 Modification to 6.2.5, Corrosion protection .9
11 Modification to 6.3.2, Materials .9
12 Modification to 6.3.3, Geometry .9
13 Modification to 6.3.5, Corrosion protection .9
14 Modification to 6.4.2, Materials .9
15 Modification to 6.4.3, Geometry . 10
16 Modification to 6.4.5, Corrosion protection . 10
17 Modification to 6.5.5, Corrosion protection . 10
18 Modifications to 7.2.2.2, Testing and compliance criteria . 10
19 Modifications to 7.3, Factory production control . 13
20 Modification to 8.2, Nails . 14
21 Modification to 8.3, Staples . 14
22 Modification to Annex A . 14
23 Deletion of Annex B . 14
24 Modifications to Annex ZA . 15

Foreword
This document (EN 14592:2008/FprA1:2011) has been prepared by Technical Committee CEN/TC 124
“Timber structures”, the secretariat of which is held by AFNOR.
This document is currently submitted to the Unique Acceptance Procedure.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.
Introduction
This amendment allows further types of stainless steel and carbon steel to be used for fasteners and permits
for some types of coating of the fasteners. This ensures that products marketed before the first version of this
standard was issued can fulfill the requirements. Furthermore, lacks of consistence with EN 1995-1-1 have
been corrected.
1 Modification to the Scope
Replace:
"This European Standard does not cover resin coated dowel-type fasteners and fasteners treated with fire
retardants to improve their fire performance. It also does not cover resin coated fasteners."
with:
"This European Standard does not cover fasteners treated with fire retardants to improve their fire
performance.
This European Standard covers fasteners that may be coated for the following purposes:
1 Corrosion protection (e.g. hot dip galvanization, epoxy coating);
2 Lubricants (to facilitate insertion);
3 Withdrawal enhancement and/or collation (adhesive coating).".
2 Modifications do Clause 2, Normative references
Replace:
"EN 10088-1, Stainless steels - Part 1: List of stainless steels
EN 10088-2, Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion
resisting steels for general purposes"
with:
"EN 10088 (all parts), Stainless steels".
Replace:
"EN 10230-1, Steel wire nails - Part 1: Loose nails for general applications".
with:
"EN 10263 (all parts), Steel rod, bars and wire for cold heading and cold extrusion
EN 10269, Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties".
Add:
"EN 10277-2, Bright steel products - Technical delivery conditions - Part 2: Steels for general engineering
purposes",
"EN 15737, Timber structures - Test methods - Torsional resistance of driving in screws" and
"EN ISO 6892-1, Metallic materials - Tensile testing - Part 1: Method of test at room temperature
(ISO 6892-1:2009)".
Delete the references to EN 10278 and ISO 286-2.

3 Modifications to Clause 3, Terms and definitions
In 3.2, threaded nail, add to the text line:
“l as defined in Figure 1 b”.
g
Replace Figure 1 with the following: "

Figure 1 a – Nominal diameter d and length l of nails
lg
Figure 1 b – Length of the threaded part l of nails and screws
g
Figure 1 – Nominal diameter, length and length of the threaded part of nails and screws".
Replace 3.10 effective screw diameter and all text inclusive the NOTE with: "
3.10
thread root diameter
inner diameter of the threaded part, see Figures 1 and 3
NOTE The inner diameter is used in EN 1995-1-1 to determine the effective diameter.”.
Add: "
3.12
coating type
defines the purpose of a coating
Coating type 1: Corrosion protection
Coating type 2: Lubricant to facilitate insertion
Coating type 3: Adhesive coating for improving withdrawal strength and/or for collation purposes".
4 Modification to 5.3, Nominal diameter
Second indent, replace "maximum" with "minimum".
5 Modifications to 6.1, Nails
Replace the content of 6.1.1 with "Void".
In 6.1.2, Materials, replace:
"EN 10083-1 or EN 10088-2.".
with:
"EN 10088. The relevant specification shall be declared.
Other steel grades may be used, provided it has been documented that the steel has at least equivalent
mechanical properties to any of the grades listed in the above standards. All relevant information of the
alternative steel grades shall be obtained from testing and declared as a part of the ITT.".
In 6.1.3, Geometry, third paragraph, replace:
"1,5 d"
with:
"2,5 d".
In 6.1.3, Geometry, fifth paragraph, replace:
"Dimensional tolerances for nails shall comply with the requirements of EN 10230-1"
with:
“If nails are coated with a type 3 coating, the coated length shall be at least 0,5 l.”.
Replace the figure of Figure 2 with the following: "

".
Delete the note below Figure 2.
6 Modification to 6.1.4.3, Characteristic withdrawal parameter
Delete first paragraph:
"Characteristic withdrawal parameter f of plain shank nails shall be less than 4,5 N/mm when measured on
ax,k
timber with a characteristic density of 350 kg/m when conditioned to constant mass at 20 ºC and 65 %
relative humidity.".
7 Modification to 6.1.5, Corrosion protection
Replace all the present text with:
“For nails, where corrosion protection is required, the grade of the parent material or thickness of coating shall
be declared.
NOTE Examples of corrosion protection or material specifications for different service classes are given in
EN 1995-1-1 and Annex A.”.
8 Modification to 6.2.2, Materials
Replace:
"EN 10088-2"
with:
"EN 10088. The relevant specification shall be declared.
Other steel grades may be use
...