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The most impactful change is the move to phase out Fe 415 grade steel from general structural applications in favor of higher strength steel (Fe 500 and above) and ductile steel (HYSD).
| Amendment Number | Year | Key Focus Area | |----------------|------|----------------| | Amendment 1 | 2001 | Editorial and minor corrections | | Amendment 2 | 2004 | Durability, cover requirements | | Amendment 3 | 2007 | Reinforcement detailing and fire resistance | | | 2013 (Reaffirmed 2021) | Limit state design revisions, material specifications, durability enhancements | is 456 latest amendment pdf
This amendment introduced critical updates regarding steel reinforcement properties, concrete grades, and durability requirements. The most impactful change is the move to