General Information

Abstract

(1)   EN 1999-1-1 gives basic design rules for structures made of wrought aluminium alloys and limited guidance for cast alloys (see section 3).
NOTE   Minimum material thickness may be defined in the National Annex. The following limits are recommended – if not otherwise explicitly stated in this standard:
-   components with material thickness not less than 0,6 mm;
-   welded components with material thickness not less than 1,5 mm;
-   connections with:
o   steel bolts and pins with diameter not less than 5 mm;
o   aluminium bolts and pins with diameter not less than 8 mm;
o   rivets and thread forming screws with diameter not less than 4,2 mm
(2)   The following subjects are dealt with in EN 1999-1-1:
Section 1:   General
Section 2:   Basis of design
Section 3:   Materials
Section 4:   Durability
Section 5:   Structural analysis
Section 6:   Ultimate limit states for members
Section 7:   Serviceability limit states
Section 8:   Design of joints
Annex A    Execution classes
Annex B   Equivalent T-stub in tension
Annex C    Materials selection
Annex D   Corrosion and surface protection
Annex E    Analytical models for stress strain relationship
Annex F    Behaviour of cross section beyond elastic limit
Annex G    Rotation capacity
Annex H    Plastic hinge method for continuous beams
Annex I    Lateral torsional buckling of beams and torsional or flexural-torsional buckling of compression members
Annex J    Properties of cross sections
Annex K    Shear lag effects in member design
Annex L    Classification of connections
Annex M   Adhesive bonded connections
(3)   Sections 1 to 2 provide additional clauses to those given in EN 1990 “Basis of structural design”.
(4)   Section 3 deals with material properties of products made of structural aluminium alloys.
(5)   Section 4 gives general rules for durability.
(6)   Section 5 refers to the structural analysis of structures, in which the members can be modelled with sufficient accuracy as line elements for global analysis.
(7)   Section 6 g

Status
Published
Public Enquiry End Date
29-Jun-2013
Publication Date
08-Apr-2014
Technical Committee
KON - Structures
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
30-Jan-2014
Due Date
06-Apr-2014
Completion Date
09-Apr-2014

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SIST EN 1999-1-1:2007/A2:2014

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Overview

SIST EN 1999-1-1:2007/A2:2014 is the Slovenian adoption of the European standard EN 1999-1-1:2007/A2:2013, also known as Eurocode 9: Design of aluminium structures - Part 1-1: General structural rules. Published by the Slovenian Institute for Standardization (SIST), this standard provides comprehensive rules for the structural design of buildings and civil engineering works made primarily from wrought aluminium alloys, with some guidance for cast alloys.

Eurocode 9 is part of the wider Eurocodes suite, which sets harmonized technical standards for building and civil engineering works across Europe. The rules support safe, durable, and efficient design of aluminium structures, offering both performance requirements and referencing best-practice analytical methods.

Key Topics

The standard is structured into focused sections and annexes covering:

  • Basis of design: Criteria for structural safety, serviceability, and durability, integrated with EN 1990.
  • Materials: Properties and specifications for structural aluminium, including chemical composition, temper designation, and technical delivery conditions.
  • Durability: General rules for ensuring the long-term performance of aluminium structures by addressing environmental influences and corrosion.
  • Structural analysis: Requirements for modelling structures and elements in global analysis, typically as line elements.
  • Limit states: Guidelines for ultimate (strength, stability) and serviceability (deformations, vibrations) limit state verification.
  • Design of joints: Provisions on joining elements including bolts, pins, rivets, and welded connections, with specific material thickness and diameter recommendations to ensure structural integrity.
  • Execution classes and material selection: Classification of execution quality, material choice considerations, and requirements to meet specific project needs.
  • Corrosion and surface protection: Framework on protecting aluminium structures from environmental degradation.
  • Analytical models and cross-section behaviour: Models for stress-strain relationships, detailing the behaviour of sections beyond the elastic limit, and addressing effects such as lateral torsional buckling and shear lag.

Applications

Eurocode 9 Part 1-1 is essential for:

  • Structural engineers designing new buildings, bridges, and other infrastructure where aluminium is used for its advantageous properties such as lightweight and corrosion resistance.
  • Fabricators and manufacturers producing load-bearing aluminium elements and assemblies, ensuring components meet prescribed material thresholds.
  • Inspectors and quality assurance professionals verifying compliance throughout design, fabrication, and assembly stages.
  • Researchers and academia needing a reference framework for structural analysis and material performance in aluminium structures.

Typical applications include:

  • Façade structures and curtain walls
  • Pedestrian bridges and walkways
  • Industrial platforms and enclosures
  • Structural frames for commercial and residential buildings
  • Lightweight roof structures

Related Standards

Users of SIST EN 1999-1-1:2007/A2:2014 should consider related standards in the Eurocode and materials series:

  • EN 1990: Basis of structural design
  • EN 573-3: Aluminium and aluminium alloys - Chemical composition and form of wrought products
  • EN 515: Aluminium and aluminium alloys - Temper designations
  • EN ISO 6892: Metallic materials - Tensile testing
  • EN ISO 18273: Welding consumables for aluminium welding
  • EN 1999-1-2: Structural fire design for aluminium structures

For broader design tasks or project-specific requirements, materials from the entire Eurocode 9 suite and related product standards should be reviewed.


Keywords: aluminium structures, Eurocode 9, structural design, building standards, material properties, SIST EN 1999-1-1, wrought aluminium, cast aluminium, limit states, durability, joints, corrosion protection, metal structure design, European standards.

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SIST EN 1999-1-1:2007/A2:2014

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Frequently Asked Questions

SIST EN 1999-1-1:2007/A2:2014 is a amendment published by the Slovenian Institute for Standardization (SIST). Its full title is "Eurocode 9: Design of aluminium structures - Part 1-1: General structural rules". This standard covers: (1) EN 1999-1-1 gives basic design rules for structures made of wrought aluminium alloys and limited guidance for cast alloys (see section 3). NOTE Minimum material thickness may be defined in the National Annex. The following limits are recommended – if not otherwise explicitly stated in this standard: - components with material thickness not less than 0,6 mm; - welded components with material thickness not less than 1,5 mm; - connections with: o steel bolts and pins with diameter not less than 5 mm; o aluminium bolts and pins with diameter not less than 8 mm; o rivets and thread forming screws with diameter not less than 4,2 mm (2) The following subjects are dealt with in EN 1999-1-1: Section 1: General Section 2: Basis of design Section 3: Materials Section 4: Durability Section 5: Structural analysis Section 6: Ultimate limit states for members Section 7: Serviceability limit states Section 8: Design of joints Annex A Execution classes Annex B Equivalent T-stub in tension Annex C Materials selection Annex D Corrosion and surface protection Annex E Analytical models for stress strain relationship Annex F Behaviour of cross section beyond elastic limit Annex G Rotation capacity Annex H Plastic hinge method for continuous beams Annex I Lateral torsional buckling of beams and torsional or flexural-torsional buckling of compression members Annex J Properties of cross sections Annex K Shear lag effects in member design Annex L Classification of connections Annex M Adhesive bonded connections (3) Sections 1 to 2 provide additional clauses to those given in EN 1990 “Basis of structural design”. (4) Section 3 deals with material properties of products made of structural aluminium alloys. (5) Section 4 gives general rules for durability. (6) Section 5 refers to the structural analysis of structures, in which the members can be modelled with sufficient accuracy as line elements for global analysis. (7) Section 6 g

(1) EN 1999-1-1 gives basic design rules for structures made of wrought aluminium alloys and limited guidance for cast alloys (see section 3). NOTE Minimum material thickness may be defined in the National Annex. The following limits are recommended – if not otherwise explicitly stated in this standard: - components with material thickness not less than 0,6 mm; - welded components with material thickness not less than 1,5 mm; - connections with: o steel bolts and pins with diameter not less than 5 mm; o aluminium bolts and pins with diameter not less than 8 mm; o rivets and thread forming screws with diameter not less than 4,2 mm (2) The following subjects are dealt with in EN 1999-1-1: Section 1: General Section 2: Basis of design Section 3: Materials Section 4: Durability Section 5: Structural analysis Section 6: Ultimate limit states for members Section 7: Serviceability limit states Section 8: Design of joints Annex A Execution classes Annex B Equivalent T-stub in tension Annex C Materials selection Annex D Corrosion and surface protection Annex E Analytical models for stress strain relationship Annex F Behaviour of cross section beyond elastic limit Annex G Rotation capacity Annex H Plastic hinge method for continuous beams Annex I Lateral torsional buckling of beams and torsional or flexural-torsional buckling of compression members Annex J Properties of cross sections Annex K Shear lag effects in member design Annex L Classification of connections Annex M Adhesive bonded connections (3) Sections 1 to 2 provide additional clauses to those given in EN 1990 “Basis of structural design”. (4) Section 3 deals with material properties of products made of structural aluminium alloys. (5) Section 4 gives general rules for durability. (6) Section 5 refers to the structural analysis of structures, in which the members can be modelled with sufficient accuracy as line elements for global analysis. (7) Section 6 g

SIST EN 1999-1-1:2007/A2:2014 is classified under the following ICS (International Classification for Standards) categories: 91.010.30 - Technical aspects; 91.080.17 - Aluminium structures. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 1999-1-1:2007/A2:2014 has the following relationships with other standards: It is inter standard links to kSIST FprEN 1999-1-1:2022, SIST EN 1004-1:2021, SIST EN 12158-1:2022, SIST-TP CEN/TR 16999:2019, SIST EN 1999-1-1:2007. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

SIST EN 1999-1-1:2007/A2:2014 is associated with the following European legislation: EU Directives/Regulations: 2003-01-2705, 2005-01-4408, 305/2011, 89/106/EEC; Standardization Mandates: M/265. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.

SIST EN 1999-1-1:2007/A2:2014 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


SLOVENSKI STANDARD
01-maj-2014
Evrokod 9: Projektiranje konstrukcij iz aluminijevih zlitin - 1-1. del: Splošna pravila
za konstrukcije
Eurocode 9: Design of aluminium structures - Part 1-1: General structural rules
Eurocode 9: Bemessung und Konstruktion von Aluminiumtragwerken - Teil 1-1:
Allgemeine Bemessungsregeln
Eurocode 9: Calcul des structures en aluminium - Partie 1-1: Règles générales
Ta slovenski standard je istoveten z: EN 1999-1-1:2007/A2:2013
ICS:
91.010.30 7HKQLþQLYLGLNL Technical aspects
91.080.10 Kovinske konstrukcije Metal structures
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 1999-1-1:2007/A2
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2013
ICS 91.010.30; 91.080.10
English Version
Eurocode 9: Design of aluminium structures - Part 1-1: General
structural rules
Eurocode 9: Calcul des structures en aluminium - Partie 1- Eurocode 9: Bemessung und Konstruktion von
1: Règles générales Aluminiumtragwerken - Teil 1-1: Allgemeine
Bemessungsregeln
This amendment A2 modifies the European Standard EN 1999-1-1:2007; it was approved by CEN on 8 August 2013.

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. Up-to-date lists and bibliographical references concerning such
national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This amendment exists 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1999-1-1:2007/A2:2013 E
worldwide for CEN national Members.

Contents Page
1 Modifications to 1.2.3.1 .4
2 Modification to 1.2.4 .4
3 Modification to 1.2.5 .4
4 Modification to 1.3 .5
5 Modifications to 1.6 .5
6 Modification to 3.2.1 .6
7 Modification to 3.2.2 .6
8 Modification to 3.3.4 .6
9 Modification to 5.3.2 .6
10 Modification to 5.4.1 .6
11 Modification to 6.1.6.2 .6
12 Modifications to 6.2.3 .6
13 Modifications to 6.2.4 .6
14 Modifications to 6.2.5.1 .7
15 Modification to 6.2.5.2 .7
16 Modifications to 6.2.9.1 .7
17 Modifications to 6.2.9.2 .8
18 Modification to 6.2.9.3 .8
19 Modifications to 6.3.1.1 .8
20 Modification to 6.3.1.2 . 10
21 Modifications to 6.3.2.1 . 10
22 Modification to 6.3.2.3 . 10
23 Modifications to 6.3.3.1 . 11
24 Modifications to 6.3.3.2 . 12
25 Modifications to 6.3.3.3 . 13
26 Modification to 6.3.3.4 . 14
27 Modification to 6.3.3.5 . 14
28 Modification to 6.4.2.1 . 14
29 Modification to 6.5.6 . 14
30 Modification to 6.6.5 . 15
31 Modification to 6.6.6 . 15
32 Modification to 6.7.2 . 15
33 Modification to 6.7.5.5 . 15
34 Modifications to 6.8.1 . 15
35 Modifications to 8.5.1 . 16
36 Modification to 8.5.4 . 17
37 Modification to 8.5.6 . 18
38 Modifications to 8.5.7 . 18
39 Modifications to 8.5.12 . 19
40 Modification to 8.5.14.3 . 19
41 Modification to 8.6.3.4 . 19
42 Modifications to B.1 . 19
43 Modification to B.2 . 19
44 Modification to C.4.2 . 20
45 Modification to F.4 . 20
46 Modification to F.5 . 20
47 Modifications to Annex G . 20
48 Modifications to Annex H . 21
49 Modifications to I.1.2 . 21
50 Modification to I.2 . 22
51 Modifications to J.3 . 22
52 Modifications to J.4 . 22
53 Modification to J.6 . 22
54 Modification to L.3 . 22
55 Modification to L.8.1 . 22
56 Modification to M.3.3 . 22

Foreword
This document (EN 1999-1-1:2007/A2:2013) has been prepared by Technical Committee CEN/TC 250
“Structural Eurocodes”, the secretariat of which is held by BSI.
This Amendment to the European Standard EN 1999-1-1:2007 shall be given the status of a national
standard, either by publication of an identical text or by endorsement, at the latest by December 2014, and
conflicting national standards shall be withdrawn at the latest by December 2014.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
1 Modifications to 1.2.3.1
Replace the title of 1.2.3.1 with “Chemical composition and temper definition of wrought products and
technical delivery conditions”.
Add:
“EN 573-3 Aluminium and aluminium alloys - Chemical composition and form of wrought products - Part
3: Chemical composition and form of products”.
Add:
“EN 515 Aluminium and aluminium alloys - Wrought products - Temper designations”.
2 Modification to 1.2.4
Add:
“EN ISO 18273 Welding consumables - Wire electrodes, wires and rods for welding of aluminium and

aluminium alloys - Classification (ISO 18273)”.
3 Modification to 1.2.5
At the beginning of the list, add:
”EN ISO 6892 Metallic materials - Tensile testing (ISO 6892) (all parts)”.
4 Modification to 1.3
In Paragraph (1), add the following new hyphen:
“
— The aluminium products should comply with EN 573 and the product standards listed in 1.2.3. The
mechanical properties should comply with the tabulated values in Parts 2 of the product standards listed
in 1.2.3.”.
5 Modifications to 1.6
In Section 3, in the explanation for Symbol A , replace “EN 10 002” with “EN ISO 6892”.
In Section 3, in the explanation for Symbol A, replace “EN 10 002” with “EN ISO 6892”.
In Section 6, add " f is characteristic value of 0,2 % proof strength of the flange material".
of
In Section 6, in Sub-section 6.2, after symbol A , add:
eff
“
A effective cross section area allowing for local buckling and HAZ softening of transverse welds
u,eff
“.
In Section 6, in Sub-section 6.2, after symbol W , add:
net
“
section modulus allowing for local buckling and reduced thickness ρ t in HAZ softening of
u,haz
W
u,eff
transverse welds
“.
In Section 6, in Sub-section 6.3, delete the row defining “ω ”.
In Section 6, in Sub-section 6.3, in the explanation for Symbol “κ ”, replace “welding” with “longitudinal
welding”.
In Section 6, in Sub-section 6.3, replace “ξ ” with “ξξ, ”.
c yc zc
In Section 6, in Sub-section 6.3, in the explanation for Symbols “ω , ω ”, replace “factors for section with
x x,LT
localized weld” with “factors for second order bending moments”.
In Section 6, in Sub-section 6.3, after Symbols “ω , ω ”, add:
x x,LT
“
ω , ω
factors for section with localized transverse weld
x,haz xLT,haz
“.
In Annex B, replace “I ” with “l ”.
eff eff
In Annex I, replace “C , C , C , C , C ” with “C , C , C , C , C ”.
1 2 3 1,1 12 1 2 3 1,0 1,1
In Annex J, in the NOTE, replace “given in J.4” with “given in J.4 and J.6”.
6 Modification to 3.2.1
In Paragraph (1), replace “the ENs listed in 1.2.3.1” with ”EN 573-3 and tempers listed in Tables 3.2a, 3.2b
and 3.2c conforming to EN 515”.
7 Modification to 3.2.2
In Table 3.2b, footnote 1), replace “1.2.1.3” with “1.2.3.2”.
8 Modification to 3.3.4
In Paragraph (1), replace “1.2.2” with “1.2.4” and delete the NOTE.
9 Modification to 5.3.2
In Paragraph (11), before NOTE 1, add the following new NOTE:
”NOTE 1 In the general case the location of the cross section m is necessary to be obtained by an iterative procedure,
II
Nx / Nx + M x / M x
( ) ( ) ( ) ( )
Ed Rd η Rd
init
because m is in the cross section where the function achieves its maximum.”
and renumber NOTEs 1 to 3 as NOTEs 2 to 4.
10 Modification to 5.4.1
In Paragraph (3), in NOTE 2, replace “6.4.3(2)” with “L.3(2)”.
11 Modification to 6.1.6.2
In Paragraph (1) replace “ f ” with “ f ”.
a,haz u,haz
12 Modifications to 6.2.3
In Paragraph (2), regarding Formula (6.19b), replace “HAZ” with “transverse weld” and replace
“ N =/Af γ ” with “ N =/Af γ ”.
u,Rd eff u M2 u,Rd u,eff u M2
In Paragraph (2), on the last line, replace “A ” with “A ” and replace “area” with “cross-section area”.
eff u,eff
13 Modifications to 6.2.4
st nd
In Paragraph (2), on the 1 line, replace the 2 occurrence of “ N ” with “ N ”.
c,Rd o,Rd
In Paragraph (2), in List Entry a), replace “(6.21)” with “(6.21a)”.
In Paragraph (2), after List Entry a), add the following new line:
“b) in sections with transverse weld (6.21b)”.
N =/Af γ
u,Rd eff u M2
In Paragraph (2), regarding Formula (6.22), replace “b)” with “c)” and replace “ N =/Af γ ” with
c,Rd eff o M1
“ N =/Af γ ”.
o,Rd eff o M1
In Paragraph (2), on the last line, after “softening”, add “due to longitudinal welds”.
At the end of Paragraph (2), add to the list of definitions:
“A is the effective section area, obtained using a reduced thickness ρ t for class 4 parts and
u,eff c
reduced thickness ρ t for the HAZ material, whichever is smaller.”.
u,haz
14 Modifications to 6.2.5.1
In Paragraph (2), replace “(6.24)” with “(6.24a)”.
Just before Formula (6.25), add the following new formula:
“
in section with transverse weld (6.24b)
M =/Wf γ
u,Rd u,eff u M2
“.
At the end of Paragraph (2), just above Table 6.4, add to the list of definitions:
“
W is the effective section modulus, obtained using a reduced thickness ρ t for class 4
u,eff c
parts and reduced thickness ρ t for the HAZ material, whichever is smaller.
u,haz
“.
ββ−
1)
In Paragraph (2), in the last sentence, replace “value of β /β” with “value of ”.
ββ−
15 Modification to 6.2.5.2
In Paragraph (2), in List Entry c), at the end of the paragraph, add the following sentence: “At a section with
transverse weld ρ t is replaced by ρ t.”.
o,haz u,haz
16 Modifications to 6.2.9.1
ξ
 M
N
y,Ed
Ed
In Paragraph (1), replace Formula (6.40) itself with “ +≤ 1,00 ”.

NM
Rd y,Rd
γ ξ
η
0 0
 
 M M
N
y,Ed z,Ed
Ed
In Paragraph (1), replace Formula (6.41) itself with “ ++≤ 1,00 ” and replace
 



NM M
Rd y,Rd z,Rd
 
the subsequent definition of N with the following one:
Rd
“
N is axial force resistance according to 6.2.3 or 6.2.4 respectively”.
Rd
In Paragraph (1), replace the two lines with definitions of M and M with the following definition:
y,Rd z,Rd
“
M and M are the bending moment resistances with respect to the y
...