AS 4100-2020 (2021) PDF

Full title and description

AS 4100:2020 — Steel structures. Third edition (2020), reissued incorporating Amendment No. 1 (2021). Sets minimum requirements for design, fabrication, erection and modification of steelwork using the limit states design method; applies to buildings, structures and cranes constructed of steel.

Abstract

This standard specifies minimum requirements for the design and the engineering aspects of fabrication, erection and modification of steel structures in accordance with the limit states design method. It covers material properties, general design requirements, analysis methods, member design (bending, compression, tension, combined actions), connections, fatigue, fire and earthquake considerations, fabrication, erection and testing.

General information

• Status: Current (2020 edition, reissued with Amendment 1:2021).
• Publication date: 21 August 2020 (AS 4100:2020); Amendment 1 published September 2021.
• Publisher: Standards Australia (Committee BD‑001).
• ICS / categories: Construction — Structures of buildings (metal/steel structures). Common ICS references: 91.080.10 / 91.080.13 (steel structures).
• Edition / version: 3rd edition (2020), reissued incorporating AS 4100:2020 Amd 1:2021.
• Number of pages: Approximately 215 pages (PDF/print editions listed in catalogues commonly show 215 pages; some distribution listings note small page-count differences due to formatting or incorporation of amendments).

Scope

AS 4100:2020 sets out minimum requirements for the design and the engineering aspects of fabrication, erection and modification of steelwork in structures using the limit states design method. It applies to buildings, structures and cranes constructed of steel; where specialised girder forms are used the standard points to other specific standards (for example AS/NZS 5100.6 for certain box and longitudinally stiffened girders). The standard aligns wording and cross-references with related fabrication/erection specifications (for example AS/NZS 5131) and the relevant National Construction Code requirements.

Key topics and requirements

• Limit states design approach and general design requirements (design data, design details and workmanship).
• Materials: yield and tensile properties used in design, material selection and conformity.
• Structural analysis methods, including advanced and second‑order elastic analysis (normative appendices).
• Design of members under bending, axial compression, axial tension and combined actions.
• Design and detailing of connections (bolted and welded), and requirements for fabrication and erection.
• Brittle fracture, fatigue design, fire and earthquake considerations.
• Fabrication, erection, modification of existing structures, and testing of structures or elements (including construction category and architecturally exposed structural steelwork).

Typical use and users

Used by structural engineers, steel detailers, fabricators, erectors, building certifiers, asset owners and inspectors involved in the design, fabrication, erection and modification of steel structures in Australia and other jurisdictions that reference Standards Australia documents. The standard is frequently used as the principal national reference for general steelwork design outside specialised bridge codes.

Related standards

Commonly referenced and complementary documents include AS/NZS 5131 (Structural steelwork — Fabrication and erection), AS/NZS 5100 series (bridge design, where applicable), AS/NZS ISO 3834 (quality requirements for fusion welding of metallic materials), AS 1554 (welding standards), and other material and product specifications referenced in the normative references of AS 4100:2020. Users should consult the normative reference list in AS 4100 for the complete set of related standards.

Keywords

Steel structures; limit states design; structural steel; fabrication; erection; connections; welding; bolted joints; fatigue; brittle fracture; fire design; earthquake; AS 4100; Standards Australia.

FAQ

Q: What is this standard?

A: AS 4100:2020 is the Australian standard titled "Steel structures" that specifies minimum requirements for the design, fabrication, erection and modification of steelwork using the limit states approach. It is the national reference for general steel structural design in Australia.

Q: What does it cover?

A: It covers material properties, general design rules, analysis methods, member and connection design (bending, compression, tension, combined actions), brittle fracture and fatigue provisions, fire and seismic considerations, plus requirements for fabrication, erection, modification and testing. Several normative and informative appendices expand on advanced analysis and design details.

Q: Who typically uses it?

A: Structural engineers, fabricators, erectors, detailers, building certifiers and asset owners engaged in the design, manufacture, erection and verification of steel structures. Industry bodies and code authorities also reference AS 4100 for compliance and procurement.

Q: Is it current or superseded?

A: The 2020 edition is current; it was published on 21 August 2020 and reissued to incorporate Amendment 1 (published September 2021). It supersedes AS 4100-1998 (and associated amendments). Users should check for any later amendments or revisions before relying on a printed copy.

Q: Is it part of a series?

A: AS 4100 sits within a family of Australian construction and steelwork documents (for example AS/NZS 5131 for fabrication/erection, AS/NZS 5100 for bridge components) and references other material and welding standards; it is the principal national steel structures design standard for general building and structural applications.

Q: What are the key keywords?

A: Steel structures, limit states, connections, welding, bolting, fabrication, erection, fatigue, brittle fracture, fire, earthquake, design code.