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IS 15322:2003 is the Indian Standard (BIS) for fire safety in high rise buildings. This code of practice outlines the essential requirements for fire prevention, life safety, and fire protection in high-rise buildings, defined as those 15 meters or taller. It specifies standards for escape routes, fire detection and alarm systems, active firefighting installations like sprinklers and hydrants, and smoke management systems.
Outlined fire safety provisions for the design and construction of high-rise buildings (superseded by NBC 2016 Part 4).
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! This standard has been formally withdrawn. Its provisions, with updates, are now integrated into the National Building Code of India (NBC) 2016, Part 4. Always refer to the latest version of NBC Part 4 for statutory compliance.
! The 15m height threshold is a critical trigger; once a building crosses this height, a significantly more stringent set of fire safety measures becomes mandatory.
! Coordination between the architect, MEP consultant, and fire consultant is crucial to correctly implement the requirements of this code (or its successor, NBC Part 4).
Both provide comprehensive requirements for egress, fire protection systems, and life safety in various building types, including high-rise.
IBC 2024ICC (International)
HighCurrent
International Building Code
Both are comprehensive building codes with dedicated chapters on fire safety, egress, and specific provisions for high-rise structures.
Approved Document B (2019 edition)HM Government (UK)
MediumCurrent
Approved Document B (Fire Safety), Volume 2 – Buildings other than dwellings
Both provide prescriptive fire safety requirements for buildings, including high-rise, covering compartmentation, egress and systems.
BS 9999:2017BSI (UK)
MediumCurrent
Fire safety in the design, management and use of buildings — Code of practice
Offers a risk-based approach to fire safety design for all buildings, including high-rise, which is an alternative philosophy to the prescriptive Indian standard.
Key Differences
≠The trigger height for a building to be classified as 'high-rise' is significantly different. IS 15322 defines it as 15 meters (approx. 50 ft), while NFPA 101/IBC use 75 feet (approx. 23 meters), leading to more buildings being classified as high-rise under the Indian code.
≠IS 15322 is highly prescriptive. International codes like NFPA 101 and the IBC include well-defined chapters for performance-based design, allowing engineers to use alternative materials or methods if they can demonstrate an equivalent level of safety through analysis, offering greater design flexibility.
≠While the concept exists, IS 15322 and the associated National Building Code (NBC) have less detailed provisions for phased evacuation strategies compared to NFPA 101. NFPA 101 provides explicit requirements for Emergency Voice/Alarm Communication (EVAC) systems and procedures for evacuating specific zones (e.g., fire floor and adjacent floors) in very tall buildings.
≠Requirements for Fire Resistance-Rated Glazing in doors and partitions are more stringently limited in international codes. The IBC/NFPA codes have strict limitations on the size of vision panels in fire doors (e.g., 100 sq. inches) unless the entire glazing assembly is specifically tested and listed for the required duration, a level of detail and testing rigor not always matched in the 2003 Indian standard.
Key Similarities
≈Both the Indian standard and its international counterparts are fundamentally based on the principle of fire compartmentation, using fire-rated walls, floors, and doors to contain a fire to its area of origin and protect escape routes.
≈Both IS 15322 and international codes like NFPA 101/IBC mandate the provision of automatic sprinkler systems throughout high-rise buildings as a primary means of active fire suppression.
≈A core life safety principle shared by both is the requirement for a minimum of two separate and remotely located means of egress (typically protected staircases) from every floor of a high-rise building.
≈Both systems mandate the pressurization of key escape routes, such as stairwells and lobbies, in high-rise buildings to prevent smoke ingress and maintain tenable conditions for evacuating occupants and firefighting access.
Parameter Comparison
Parameter
IS Value
International
Source
Definition of High-Rise Building
Any building with a height of 15 m or more.
A building where an occupied floor is located more than 75 ft (23 m) above the lowest level of fire department vehicle access.
NFPA 101 / IBC
Mandatory Sprinkler System
Required for most occupancies (residential, business, etc.) in buildings exceeding 15 m in height.
Required throughout all new high-rise buildings (i.e., those exceeding 75 ft / 23 m).
NFPA 101 / IBC
Fire Lift / Fire Service Access Elevator
At least one fire lift is required for buildings over 15 m in height.
At least two fire service access elevators are required for buildings with an occupied floor more than 120 ft (36.6 m) above the lowest level of fire department vehicle access.
IBC
Stairwell Pressurization Requirement
Required for staircases in buildings exceeding 15 m (for some occupancies) or 24 m (for others).
Required for interior exit stairways in all high-rise buildings (>75 ft / 23 m).
IBC
Travel Distance to Exit (Business Occupancy)
Typically 30 m in a sprinklered building (as per National Building Code, which IS 15322 references).
Typically up to 300 ft (approx. 91 m) in a sprinklered building, measured along the path of travel.
NFPA 101
Fire Resistance of Primary Structural Frame
2 hours for buildings 15m-45m; 3 hours for buildings >45m (as per National Building Code).
Typically 2 hours or 3 hours for Type I construction, which is required for high-rise buildings.
IBC
Refuge Area Requirement
Required at or above 24 m. One refuge area for every 7 floors above 24 m.
Not explicitly required in the same manner; safety is achieved through other means like robust sprinkler systems, fast evacuation lifts, and compartmentation. Some jurisdictions may have local amendments.
NFPA 101 / IBC
⚠ Verify details from original standards before use
Key Values6
Quick Reference Values
Definition of High Rise Building> 15 m in height
Minimum number of staircases required2
Minimum staircase width (Residential)1.0 m
Minimum staircase width (Commercial)1.5 m
Maximum travel distance to exit (typical)30 m
Mandatory Sprinkler System Height Threshold30 m
Tables & Referenced Sections
Key Tables
Table 1 - Minimum Requirements for Fire Fighting Installations for High Rise Buildings
Key Clauses
Clause 3.10 - Definition of High Rise Building
Clause 6 - Life Safety Provisions / Means of Escape
Clause 7 - Fire Detection, Alarm and Public Address System