AS 4100:2020 Steel structures
Standards Australia
Supersedes: AS 4100-1998 Steel structures
Supersedes: AS 4100-1998 AMDT 1 Steel structures
Supersedes: AS 4100-1998 Rec:2016 Steel structures
Draft Designation: DR AS 4100:2019Amended by: AS 4100:2020 Amd 1:2021 Steel Structures
This Standard incorporates Amendment No. 1 (September 2021). The start and end of changes introduced by the Amendment are indicated in the text by tags including the Amendment number 1.
The objective of this Standard is to provide designers of steel structures with specifications for steel structural members used for load-carrying purposes in buildings and other structures.
Major changes to the 1998 edition include the following:
(a) Reference to the “construction specification” (as the document containing the particular
design data and details to be provided) as one deliverable from the design process. A definition
of the construction specification consistent with that in AS/NZS 5131 has also been provided
(Clauses 1.3.16 and 1.6.2).
(b) Introduction of the definition of “construction category” and an informative appendix
providing guidance on selection of the appropriate construction category, both consistent
with AS/NZS 5131 (Clauses 1.3.15 and 1.7.2, and Appendix L).
(c) Definition and description of “architecturally exposed structural steelwork” (AESS)
(Clauses 1.3.3 and 1.7.3)
(d) Definition and treatment of “lamellar tearing” consistent with AS/NZS 1554.1 (Clauses 1.3.40
and 3.8, and Appendix M).
(e) Alignment with AS/NZS 5100.6:2017 (various clauses).
(f) Referencing of AS/NZS 5131:2016 for the majority of requirements in the fabrication and
erection sections of this Standard (Sections 14 and 15).
(g) Alignment with AS/NZS 1252.1:2016, which includes introduction of an “alternative bolt
assembly type” to EN 14399-3 System HR for grade 8.8 bolts and an “additional bolt assembly
type” to EN 14399-3 System HR for grade 10.9 bolts. The Australian Steel Institute (ASI),
Technical Note TN-001, High strength structural bolt assemblies to AS/NZS 1252:2016, provides
background and basis for the revision to AS/NZS 1252:1996 (Clauses 9.1.6, 9.3, 15.2).
(h) New specification of geometrical tolerances for fabrication and erection aligned with
AS/NZS 5131 (Clauses 14.4 and 15.3).
(i) New Appendix K “Statistical data”, aligned with AS/NZS 5100.6.
(j) Inclusion of shear modulus G at elevated temperature in Clause 12.4.2 and a new Clause 12.4.3,
Slenderness at elevated temperature
The terms “normative” and “informative” are used in Standards to define the application of the
appendices to which they apply. A “normative” appendix is an integral part of a Standard, whereas an
“informative ” appendix is only for information and guidance.
Originated in part as SAA INT 351-1956. Previous edition AS 4100-1998. Third edition 2020. Reissued incorporating Amendment No 1 (September 2021).
This Standard sets out minimum requirements for the design and the engineering aspects of fabrication and erection, and modification of steelwork in structures in accordance with the limit states design method.
This Standard applies to buildings, structures and cranes constructed of steel.
NOTE: For design of box and longitudinally stiffened girders, refer to AS/NZS 5100.6.
Contents:
Section 1: Scope And General 1
Section 2: Materials
Section 3: General Design Requirements
Section 4: Methods Of Structural Analysis
Section 5: Members Subject To Bending
Section 6: Members Subject To Axial Compression
Section 7: Members Subject To Axial Tension
Section 8: Members Subject To Combined Actions
Section 9: Connections
Section 10: Brittle Fracture
Section 11: Fatigue
Section 12: Fire
Section 13: Earthquake
Section 14: Fabrication
Section 15: Erection
Section 16: Modification Of Existing Structures
Section 17: Testing Of Structures Or Elements
Appendix A: (Normative) Not Used
Appendix B: (Informative) Suggested Deflection Limits
Appendix C: (Informative) Selection Of Corrosion Protection Requirements
Appendix D: (Normative) Advanced Structural Analysis
Appendix E: (Normative) Second Order Elastic Analysis
Appendix F: (Normative) Moment Amplification For A Sway Member
Appendix G: (Normative) Braced Member Buckling In Frames
Appendix H: (Informative) Elastic Resistance To Lateral Buckling
Appendix I: (Informative) Strength Of Stiffened Web Panels Under Combined Actions
Appendix J: (Normative) Standard Test For Evaluation Of Slip Factor
Appendix K: (Normative) Statistical Data
Appendix L: (Informative) Guidance On Determination Of The Construction Category
Appendix M: (Informative) Selection Of Materials For The Avoidance Of Lamellar Tearing
Amendment Control Sheet
Steel Structures.
BD-001
Australian Building Codes Board; Australian Chamber of Commerce and Industry; Australian Industry Group; Australian Steel Association; Australian Steel Institute; Austroads; Bureau of Steel Manufacturers of Australia; Consult Australia; Engineers Australia; Rail Industry Safety and Standards Board; University of New South Wales; University of Sydney; Weld Australia; Western Sydney University.
