While IS 456:2000 remains the active base code, the Bureau of Indian Standards (BIS) has also circulated a , titled IS 456:2025 ("Structural Concrete: Code of Practice"), which is expected to eventually replace the current standard. Key Highlights of Amendment No. 6 (June 2024)
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Plain and Reinforced Concrete - Code of Practice Bureau of Indian Standards (BIS) While IS 456:2000 remains the active base code,
The Indian Standard IS 456 Amendment No. 6, released in 2024, updates the code of practice for plain and reinforced concrete by incorporating new sustainable cement types like LC3 and revising mineral admixture limits, such as limiting fly ash to 35%. The amendment also introduces high-strength concrete grades up to M100 and reinforces restrictions on using sea water to enhance structural durability. For a detailed breakdown of the amendment, see this Scribd document . Plain and Reinforced Concrete - Code of Practice
Here is what you need to know to ensure you have the "good" and correct version: The "Latest" Status : The main document is still IS 456:2000 (Fourth Revision) Latest Amendment : As of early 2026, Amendment No. 6 (June 2024) is the most recent update. Next Big Change Draft IS 456:2025 (Fifth Revision)