Rapid Fire
Rollback of Seismic Code of 2025
- 13 Mar 2026
- 2 min read
The Bureau of Indian Standards (BIS) has withdrawn its 2025 seismic code (IS 1893) following concerns raised by the Ministry of Housing and Urban Affairs (MoHUA). The previous standard, IS 1893 of 2016, is now back in effect.
- MoHUA raised serious concerns, like huge construction cost escalation, estimated at 10-15% in Zones V and VI for buildings, and up to 50% for infrastructure projects and inadequate stakeholder consultation before finalising the code.
- The revision was based on advanced scientific methods like Probabilistic Seismic Hazard Assessment (PSHA), active fault mapping, and near-fault effects.
- Seismic Code: A seismic code is a set of regulations and standards designed to ensure that buildings and other structures can withstand the forces generated by earthquakes.
- Its primary purpose is to protect public safety by minimizing the risk of structural collapse, reducing property damage, and safeguarding lives during a seismic event.
- Current Applicable Standard: As of March 2026, the seismic zonation of India is governed by IS 1893 (Part 1):2016, issued by the Bureau of Indian Standards (BIS).
- This standard divides the country into four seismic zones i.e., Zone II (Low), Zone III (Moderate), Zone IV (High), and Zone V (Very High), with approximately 59% of India's landmass considered prone to earthquakes.
| Read More: Earthquake |
