Is 456 Latest Amendment Pdf Now

As of April 2026, the latest formal update to the concrete code is Amendment No. 6, issued in June 2024 to the IS 456:2000 (Fourth Revision).

While IS 456:2000 remains the active base code, the Bureau of Indian Standards (BIS) has also circulated a preliminary draft for the 5th Revision, 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)

This amendment introduces significant technical updates, particularly regarding sustainable materials and concrete mix requirements:

New Cement Types: Incorporates specifications for Composite Cement and Portland Calcined Clay Limestone Cement (as per IS 18189) for use in reinforced concrete.

Mineral Admixtures: Updates guidelines for using materials like fly ash, ground granulated blast furnace slag (GGBS), and ultrafine materials (silica fume, metakaolin). Concrete Durability:

Adds restrictions on using certain cements in underground structures or contact with groundwater in cold climates (predominantly below 15°C). is 456 latest amendment pdf

Revises Table 5 to reduce the maximum free water-cement ratio by 0.05 when using Portland Calcined Clay Limestone Cement.

Testing and Strength: Refines procedures for concrete strength testing and updates bond stress values for reinforcing bars. Future Outlook: IS 456:2025 (Draft)

The upcoming 5th revision represents a major overhaul of the standard:

Scope Expansion: It is expected to merge provisions for both reinforced and prestressed concrete, potentially withdrawing IS 1343:2012.

Design Criteria: Introduces six primary criteria: strength, serviceability, durability, robustness, integrity, and restorability. As of April 2026, the latest formal update

New Title: The code's name will change to Structural Concrete: Code of Practice. Verification and Official Links

For professional use, always refer to the latest versions directly from official or verified repositories:

Bureau of Indian Standards (BIS): You can search for and download official amendments and draft versions on the BIS e-Sale Portal.

Consolidated Codes: Platforms like Law Resource India often host the base IS 456:2000 code, though they may not always include the very latest 2024 amendment immediately.

IS 456: 2000 Amendment No. 6 (2024) | PDF | Concrete - Scribd Base Code: IS 456:2000 Latest Major Amendment: Amendment

This is a deep report regarding the search query "IS 456 latest amendment PDF."

Because IS 456 is the primary code of practice for Plain and Reinforced Concrete in India, understanding its amendment status is critical for structural engineers, contractors, and architects.

Here is the detailed breakdown of the current status, the specific changes introduced in the latest amendment, and a guide on how to access the document legally.

1. Document Status

Comparison: IS 456:2000 vs. International Codes (After Amendment No. 4)

After the latest amendment, IS 456 aligns more closely with:

| Feature | IS 456 (with Amd. 4) | ACI 318-19 (USA) | Eurocode 2 | |---------|----------------------|------------------|------------| | Min. cover (mild exposure) | 25 mm | 40 mm (for non-prestressed) | 25 mm | | Max cement content | 450 kg/m³ | No limit (but durability checks) | 400 kg/m³ | | Partial safety factor for concrete | 1.5 | 1.4 | 1.5 | | Minimum Fe grade reinforcement | Fe 415 | Grade 60 (≈420 MPa) | B500C (500 MPa) |

The latest amendment bridges the gap between older Indian practices and modern international standards.

Q2: Does the amendment affect existing buildings?

Generally no – it applies to new designs. However, for major retrofitting or redevelopment, the new standards may be invoked.