This specification covers the design, fabrication, supply, and delivery of Structural steel, Levels 1-10 for the Meridian Tower, North Sydney. It defines performance requirements, materials, tolerances, quality assurance, and documentation deliverables.

The works comprise a total of 480 tonnes and shall be completed to the schedule outlined in Section 9.

• AS/NZS 4100 — Steel Structures
• AS/NZS 1554 — Structural steel welding (Part 1, 3, 5 as applicable)
• AS/NZS 5131 — Structural Steelwork Fabrication and Erection, Construction Category 3
• AS/NZS ISO 9001 — Quality management
• National Construction Code (NCC) 2022 Volume One

All fabrication and erection tolerances shall conform to AS/NZS 5131 Construction Category 3. Flatness and straightness tolerances: member length divided by 1000, not exceeding 10 mm. Connection plate flatness: ±1.5 mm across any 300 mm gauge length.

All exposed steel shall be shot-blasted to Sa 2.5 (AS 1627.4) immediately prior to priming. Primer: inorganic zinc silicate 75 µm DFT. Intermediate: epoxy mastic 125 µm DFT. Topcoat: polyurethane 75 µm DFT in RAL 7016 anthracite grey unless otherwise nominated.

• Inspection and test plan (ITP) issued prior to commencement.
• Weld procedure specifications (WPS) approved to AS/NZS 1554.1.
• 100% visual inspection, 10% NDT (MPI or UT) of full-penetration welds.
• Mill certificates retained for all material batches.
• QA documentation pack issued with every progress delivery.

1. Shop detail drawings — 4 weeks before fabrication.
2. WPS and welder qualifications — prior to first weld.
3. Mill certificates and NDT reports — on progressive delivery.
4. Final QA pack — within 14 days of practical completion.

Works shall commence no later than 14 days after release for manufacture. Progressive deliveries shall align with the construction program.