Earthquake Resistant Design & Construction of Buildings
Third Revision · Last reviewed 2024-11
Provides guidelines for earthquake-resistant design and construction of buildings in India, categorised by seismic zones II through V.
Key clauses — Rebota's plain-English summary
Paraphrased for working engineers, not a verbatim reproduction of the standard. For compliance documentation, tender submissions, or any use requiring the exact clause text, refer to the official IS 4326:2013 document published by the Bureau of Indian Standards (BIS) — this summary is an interpretation aid, not a substitute for it.
- Seismic zones: II (low), III (moderate), IV (severe), V (very severe)
- Zone factor Z: 0.10, 0.16, 0.24, 0.36 for Zones II, III, IV, V respectively
- Soft storey: storey stiffness < 70% of storey above — must be avoided
- Reinforcement: minimum ties at d/4 or 100mm in columns within plastic hinge zones
- Ductility detailing: per IS 13920 for all RCC structures in Zone III–V
