The 2023 revision incorporates Annex J – Sustainability Specification , which addresses low-carbon material procurement and circular economy practices.

The specification defines standards for the fabrication and erection of structural steelwork and is intended to be incorporated into contract documentation.

Originally developed for structures designed to , the NSSS has evolved to encompass Eurocode 3 (BS EN 1993) and Execution Class 2 (EXC2) as the baseline for most building projects. The 7th Edition and its subsequent 1st Revision (October 2023) introduce critical mandatory requirements for contractor competency and environmental sustainability. Key Updates in the 7th Edition (1st Revision)

Practical implications for projects