Standard

AS/NZS 4673:2001

[Withdrawn]

Cold-formed stainless steel structures

Sets out requirements for the design of cold-formed stainless steel structural members. Steels for use with this Standard include those specified by a wide range of international Standards. Members may be shaped from annealed or temper-rolled sheet, strip, plate or flat bar.

Published: 09/11/2001

Pages: 126

Table of contents

Cited references

Content history

Table of contents

Header

About this publication

Preface

1 Scope and general

1.1 Scope

1.2 Referenced documents

1.3 Definitions

1.4 Notation

1.5 Materials

1.5.1 Selection of stainless steel grade

1.5.1.1 Factors to be considered

1.5.1.2 Corrosion resistance

1.5.1.3 Surface finish and appearance

1.5.1.4 Cosmetic applications

1.5.1.5 Maintenance

1.5.2 Stainless steels

1.5.2.1 Applicable stainless steel grades

1.5.2.2 Other stainless steel grades

1.5.2.3 Availability of stainless steel grades and product forms

1.5.2.4 Strength increase resulting from cold-forming (ferritic stainless steels)

1.5.2.5 Effect of welding and heat treatment

1.5.2.6 Ductility

1.5.2.7 Acceptance of steels

1.5.2.8 Delivered minimum thickness

1.5.2.9 Unidentified steel

1.5.3 Design stresses

1.5.4 Fasteners

1.5.4.1 Bolts, nuts and washers

1.5.4.2 Welding consumables

1.6 Design requirements

1.6.1 Loads and load combinations

1.6.2 Structural analysis and design

1.6.2.1 General

1.6.2.2 Ultimate limit state

1.6.2.3 Stability limit state

1.6.2.4 Serviceability limit state

1.6.2.5 Fatigue

1.6.2.6 Fire

1.6.3 Earthquake

1.6.4 Durability

1.7 Non-conforming shapes and construction

2 Elements

2.1 Section properties

2.1.1 General

2.1.2 Design procedures

2.1.2.1 Full section properties

2.1.2.2 Effective section properties

2.1.2.3 Location of reduced width

2.1.2.4 Effective section for determining deflection

2.1.3 Dimensional limits

2.1.3.1 Maximum flange flat-width-to-thickness ratios

2.1.3.2 Flange curling

2.1.3.3 Shear lag effects (usually short spans supporting concentrated loads)

2.1.3.4 Maximum web depth-to-thickness ratio

2.2 Effective widths of stiffened elements

2.2.1 Uniformly compressed stiffened elements

2.2.1.1 General

2.2.1.2 Effective width for capacity calculations

2.2.1.3 Effective width for deflection calculations

2.2.2 Effective widths of webs and stiffened elements with stress gradient

2.2.2.1 Effective widths for capacity calculations

2.2.2.2 Effective width for deflection calculations

2.3 Effective widths of unstiffened elements

2.3.1 Uniformly compressed unstiffened elements

2.3.1.1 General

2.3.1.2 Effective width for capacity calculations

2.3.1.3 Effective width for deflection calculations

2.3.2 Unstiffened elements and edge stiffeners with stress gradient

2.3.2.1 General

2.3.2.2 Effective width for capacity calculations

2.3.2.3 Effective width for deflection calculations

2.4 Effective widths of uniformly compressed elements with an edge stiffener or one intermediate stiffener

2.4.1 Notation

2.4.2 Elements with an intermediate stiffener

2.4.2.1 General

2.4.2.2 Effective width for capacity calculations

2.4.2.3 Effective width for deflection calculations

2.4.3 Elements with an edge stiffener

2.4.3.1 General

2.4.3.2 Effective width for capacity calculations

2.4.3.3 Effective width for deflection calculations

2.5 Effective widths of edge-stiffened elements with one or more intermediate stiffeners, or stiffened elements with more than one intermediate stiffener

2.6 Stiffeners

2.6.1 Transverse stiffeners

2.6.2 Shear stiffeners

2.6.3 Non-conforming stiffeners

3 Members

3.1 General

3.2 Members subject to tension

3.3 Members subject to bending

3.3.1 Bending moment

3.3.2 Nominal section moment capacity

3.3.2.1 General

3.3.2.2 Based on initiation of yielding

3.3.2.3 Based on inelastic reserve capacity

3.3.2.4 Local distortion

3.3.3 Nominal member moment capacity

3.3.4 Shear

3.3.5 Combined bending and shear

3.3.6 Bearing

3.3.7 Combined bending and bearing

3.4 Concentrically loaded compression members

3.4.1 General

3.4.2 Sections not subject to torsional or flexural-torsional buckling

3.4.3 Doubly symmetric or point-symmetric sections subject to torsional buckling

3.4.4 Singly symmetric sections subject to flexural-torsional buckling

3.4.5 Non-symmetric sections

3.5 Combined axial compressive load and bending

3.6 Tubular members

3.6.1 General

3.6.2 Bending

3.6.3 Compression

3.6.4 Combined compression and bending

3.6.5 Shear

3.6.6 Combined shear and bending

3.6.7 Welded connections

4 Structural assemblies

4.1 Built-up sections

4.1.1 Sections composed of two channels

4.1.2 Spacing of connections in compression elements

4.2 Mixed systems

4.3 Lateral restraints

4.3.1 General

4.3.2 Symmetrical beams and columns

4.3.3 Channel and Z-section beams

4.3.3.1 General

4.3.3.2 Bracing when one flange is connected

4.3.3.3 Neither flange connected to sheeting

4.3.3.4 Laterally unbraced box beams

5 Connections

5.1 General

5.2 Welded connections

5.2.1 General

5.2.2 Butt welds

5.2.2.1 General

5.2.2.2 Tension or compression

5.2.2.3 Shear

5.2.3 Fillet welds

5.2.3.1 General

5.2.3.2 Longitudinal loading

5.2.3.3 Transverse loading

5.2.4 Resistance spot welds

5.2.4.1 General

5.2.4.2 Shear

5.2.4.3 Tension

5.2.5 Tubular connections

5.3 Bolted connections

5.3.1 General

5.3.2 Holes

5.3.3 Spacing and edge distance

5.3.4 Tear out capacity of the connected part

5.3.5 Net section tensile capacity of the connected part

5.3.6 Bearing capacity of the connected part

5.3.7 Stainless steel bolts to ASTM Standards

5.3.7.1 General

5.3.7.2 Bolts in shear

5.3.7.3 Bolts in tension

5.3.7.4 Bolts in combined shear and tension

5.3.8 Stainless steel bolts to ISO 3506

5.3.8.1 General

5.3.8.2 Bolts in shear

5.3.8.3 Bolts in tension

5.3.8.4 Bolts in combined shear and tension

6 Testing

6.1 Testing for determining material properties

6.1.1 Design based on measured values of yield stress

6.1.2 Testing of unformed steel

6.1.3 Compression testing

6.1.4 Testing of full sections

6.1.5 Testing of flat coupons of formed members

6.1.5.1 Assessment of strength increase

6.1.5.2 Design properties

6.2 Testing for assessment or verification

6.2.1 General

6.2.2 Static tests for strength or serviceability

6.2.2.1 Test specimens

6.2.2.2 Test loads

6.2.2.3 Coefficient of variation of structural characteristics

6.2.2.4 Test requirements

6.2.2.5 Criteria for acceptance

6.2.2.6 Test report

6.2.2.7 Design capacity of specific products and assemblies

Appendix A

Appendix B

B1 Mechanical properties of stainless steels

B2 Mechanical properties of welds

Appendix C

C1 Introduction

C2 Stainless steel grades

C2.1 Introduction

C2.2 Classification of stainless steels by microstructures

C2.3 Effect of product form

C3 Effect of alloying elements in stainless steels

C4 Surface finish

C5 Mechanical behaviour and design value of properties

C5.1 Basic stress-strain behaviour

C5.1.1 Non-linearity

C5.1.2 Non-symmetry of tensile and compressive behaviour

C5.1.3 Anisotropy

C5.2 Factors affecting stress-strain behaviour

C6 Physical properties

C7 Durability—Corrosion

C7.1 Introduction

C7.2 Mechanism of corrosion resistance

C7.3 Types of corrosion and performance of steel grades

C7.3.1 General (uniform) corrosion

C7.3.2 Abrasion corrosion

C7.3.3 Pitting corrosion

C7.3.4 Crevice corrosion

C7.3.5 Intergranular corrosion (sensitization)

C7.3.6 Galvanic corrosion

C7.3.7 Stress corrosion cracking

C7.3.8 Effect of welding on corrosion resistance

C7.4 Corrosion in selected environments

C7.4.1 Air

C7.4.2 Sea water

C7.4.3 Other waters

C7.4.4 Chemical environments

C7.5 Design for corrosion control

C8 Grade selection

C8.1 Introduction

C8.2 Grade selection

C8.2.1 Ferritic grade 409

C8.2.2 Ferritic grade EN 10088 1.4003

C8.2.3 Ferritic grade 430

C8.2.4 Austenitic grade 304

C8.2.5 Austenitic grade 316

C8.2.6 Austenitic grade 301

C8.2.7 Martensitic grade 420C

C8.2.8 Duplex grade S31803

C9 References

Appendix D

D1 Introduction

D2 Identifying stainless steel fasteners

D2.1 General

D2.2 Identifying stainless steel fasteners to ISO 3506

Appendix E

E1 General

E2 Load-carrying capacity [strength]

E3 Deflections

E4 Limitations

Appendix F

F1 General

F2 Weld fatigue

F3 Fatigue design in accordance with Euro Inox

F4 Fatigue design in accordance with Eurocode 3

F5 Fatigue in accordance with AS 4100 with application to stainless steel

F6 References

Appendix G

G1 General

G2 Properties of stainless steels

G3 Other Standards

G4 Post-fire performance

Appendix H

H1 Shear centre distance (m), torsion constant (J) and warping constant (Iw)

H2 Monosymmetry section constants

Appendix I

Appendix J

J1 General

J2 Definitions

J3 Field of application

J4 Analysis

J5 Welds

J6 Welded joints between circular hollow sections

J7 Welded joints between hollow section brace members and square/rectangular hollow section chords

J7.1 General

J7.2 Square or circular brace members and square chords

J7.3 Rectangular sections

J8 Welded joints between hollow section brace members and I-section chords

Appendix K

Cited references in this standard

Content history

DR 00011

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