NBC 2016:2016 Part 11 is the Indian Standard (BIS) for national building code of india 2016 - approach to sustainability. Part 11 is new in NBC 2016 and reflects the shift toward sustainable building practice. It is an advisory Part: it lays out a structured approach — site, water, energy, materials, indoor environment, waste — and gives qualitative and some quantitative targets at each stage of the building life cycle. Part 11 deliberately does not compete with the established green-rating systems (GRIHA, IGBC LEED, BEE Star). Instead it provides a non-rating baseline that all buildings should aspire to, and points toward the rating systems for certification-level performance. The Part is most useful to clients who want a responsible building without pursuing formal certification, and to designers writing project sustainability briefs.
Sets out the approach to sustainability in buildings: site selection and planning, water conservation, energy efficiency, building materials, indoor environmental quality, waste management, and post-occupancy performance monitoring.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| High-Rise Building Definition Threshold | Building height ≥ 15 m | Building with an occupied floor > 75 ft (≈ 23 m) above lowest level of fire dept. vehicle access | IBC 2024 |
| Mandatory Refuge Area Requirement | Yes, for buildings > 24m, at 24m and then every 15m. Area is 0.3 m²/person or 15 m² min. | No specific prescriptive requirement; addressed by other means like evacuation elevators or additional stairwells. | IBC 2024 |
| Min. Corridor Width (Institutional/Hospitals) | 2.0 m for non-ambulatory patients; 2.4 m if for stretcher movement | 96 inches (≈ 2.44 m) in new healthcare occupancies | NFPA 101:2024 |
| Max. Travel Distance (Business Occupancy, Sprinklered) | 45 m | 300 ft (≈ 91 m) | NFPA 101:2024 |
| Fire Resistance of Exit Stair Enclosure (High-Rise) | 2 hours | 2 hours | IBC 2024 |
| Automatic Sprinkler Trigger (New Hotels) | Mandatory if height > 15 m | Required in all new hotels, regardless of height (with few exceptions for small buildings) | NFPA 101:2024 |
| Ramp Slope (Means of Egress) | Maximum 1 in 10 (10%) | Maximum 1 in 12 (≈ 8.3%) | IBC 2024 |