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IS 8274:1992 Part 1 is the Indian Standard (BIS) for fire resistant structures - general principles. This standard lays down the general principles for the design of fire-resistant structures. It defines key terminology like fire load and fire resistance rating, and outlines the criteria (stability, integrity, insulation) used to evaluate the performance of structural elements during a fire.
Provides general principles for the design and construction of fire-resistant building structures and elements.
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! This code is foundational and should be used alongside the National Building Code (NBC) Part 4: Fire and Life Safety, which provides comprehensive and mandatory requirements.
! The fire resistance rating (in minutes) indicates the duration an element can perform its function in a standard test fire, not that it is 'fireproof'.
! Understanding the concept of 'fire load' (Clause 6) is crucial for determining the required fire resistance for different building occupancies.
EN 1991-1-2:2002CEN (European Committee for Standardization), Europe
HighCurrent
Eurocode 1: Actions on structures — Part 1-2: General actions — Actions on structures exposed to fire
Both standards provide principles for determining the thermal and mechanical actions on structures during a fire.
BS 9999:2017BSI (British Standards Institution), UK
MediumCurrent
Fire safety in the design, management and use of buildings — Code of practice
Covers the same general principles but is a far more comprehensive, risk-based code of practice for total fire safety design.
NFPA 220:2021NFPA (National Fire Protection Association), USA
HighCurrent
Standard on Types of Building Construction
Both provide a framework for classifying building types based on the fire-resistance ratings of their structural elements.
NCC 2022, Volume OneABCB (Australian Building Codes Board), Australia
MediumCurrent
National Construction Code, Volume One (specifically Section C - Fire Resistance)
Both establish principles for required fire resistance levels for building elements based on building classification and use.
Key Differences
≠IS 8274 is a high-level principles document from 1992, whereas modern international standards like BS 9999 are comprehensive, risk-based codes of practice that offer multiple design solutions (prescriptive and engineered).
≠International standards like the Eurocodes provide sophisticated fire models (e.g., parametric time-temperature curves, localized fires), while IS 8274 is based on the simpler concept of fire load density and the standard cellulosic fire curve.
≠Fire resistance rating in IS 8274 is defined in hours. Eurocodes use the R-E-I classification (Resistance, Integrity, Insulation) in minutes, and the Australian NCC uses a three-part FRL (e.g., 90/90/90) for structural adequacy/integrity/insulation.
≠IS 8274 is a standalone document referencing other IS codes. Modern systems like the Eurocodes are a fully integrated suite of standards where the fire parts (Part 1-2) are specific to each material (concrete, steel, etc.) and work cohesively.
Key Similarities
≈All standards are fundamentally based on the concept of achieving structural stability and compartmentation for a specified time during a fire to ensure life safety and facilitate firefighting.
≈The concept of compartmentation, dividing a building into fire-resisting zones to limit fire and smoke spread, is a core principle in both IS 8274 and its international counterparts.
≈All standards link the required level of fire resistance to building characteristics such as height, area, and occupancy type (use), implementing a graded approach to safety.
≈The standard time-temperature curve for testing (based on ISO 834) is the common underlying basis for determining fire resistance ratings in India and across most international standards.
Parameter Comparison
Parameter
IS Value
International
Source
Primary Unit for Fire Resistance
Hours (e.g., 1 h, 2 h, 4 h)
Minutes in R/E/I format (e.g., REI 60, REI 120)
EN 1991-1-2
Unit of Fire Load Density
kilocalories per square metre (kcal/m²)
Megajoules per square metre (MJ/m²)
EN 1991-1-2
Construction Classification System
Not in IS 8274; described in the National Building Code of India (NBC) as Type 1, 2, 3, 4
Types I, II, III, IV, V with subclasses (e.g., I-A, II-B)
NFPA 220
Standard Fire Curve Equation
Implied via reference to test standards
T = 345 log10(8t + 1) + 20 (where T is temp in °C, t is time in minutes)
EN 1991-1-2 (from ISO 834)
Approach to Design
Prescriptive principles
Prescriptive, risk-based, and performance-based engineering solutions
BS 9999
Australian FRL criteria
Not applicable; uses a single hourly rating.
Three criteria: Structural Adequacy / Integrity / Insulation (e.g., 120/120/120)
NCC 2022
⚠ Verify details from original standards before use
Key Values4
Quick Reference Values
Fire Resistance CriteriaStability, Integrity, Insulation
Basis for Fire Resistance TestTime-temperature curve as per IS 3809
Fire Load DefinitionHeat quantity per unit floor area (MJ/m^2)
Standard Fire Resistance Ratings30, 60, 90, 120, 180, 240 minutes
Tables & Referenced Sections
Key Tables
No tables data
Key Clauses
Clause 3 - Terminology
Clause 4 - General Principles of Fire Resistant Design
What are the three main criteria for determining fire resistance?+
Stability (R), Integrity (E), and Insulation (I), which are evaluated during a standard fire test as per IS 1642.
What is 'Fire Load'?+
It is the potential calorific energy of all combustible materials in a space, divided by the floor area, typically expressed in MJ/m² (Clause 3.7).
Does this standard specify the required fire resistance for a hospital?+
No, this standard provides the principles. The specific fire resistance ratings required for different building types like hospitals are given in IS 1641 and the National Building Code (NBC).