IS 456:2023 (published November 2023) is the current valid version. IS 456:2000 is withdrawn as of 2024.
The Bureau of Indian Standards has its own portal called BIS e-Book. As of recent updates, some older standards are free. For IS 456:2000:
| Feature | IS 456:1978 (Obsolete) | IS 456:2000 (Current) | | :--- | :--- | :--- | | Design Philosophy | Working Stress Method (primary) | Limit State Method (primary) | | Grade of Concrete | Up to M40 | Up to M80 and higher (with amendments) | | Steel Grades | Mild steel, HYSD bars (Fe 415) | Fe 415, Fe 500, Fe 550, Fe 600 | | Durability | Minimal provisions | Detailed exposure conditions (mild to extreme) | | Minimum Reinforcement | Lower values | Increased for crack control | | Shear & Bond | Less conservative | More rigorous safety factors | | Deflection Control | Basic span/depth ratios | More detailed checks | is 456 code 1978 free download pdf new
The BIS Care app (Android & iOS) provides a paid subscription model. For about ₹500 per year, you can read any IS code online within the app – no download, but legal and safe.
Legally, no. But many universities have a relaxed attitude for educational use. However, you risk downloading malware. Instead, ask your college library for a licensed copy. IS 456:2023 (published November 2023) is the current
Preview on BIS Website – Free but limited to first few pages (table of contents + scope)
Educational Access – If you're a student, ask your college library. Many engineering colleges have institutional BIS access. Preview on BIS Website – Free but limited
Some state government engineering portals – Occasionally host copies for reference, but not officially.
Law.Resource.org – Sometimes provides historical Indian standards for legal reference (not guaranteed to have current version).
If you are a student or faculty member, you may have legal free access through your institution.