BSI PD ISO/TS 16733-2:2021

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Fire safety engineering. Selection of design fire scenarios and design fires – Design fires

Published By	Publication Date	Number of Pages
BSI	2021	62

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Categories: 13.220.01 - Protection against fire in general, BSI

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This document provides guidance for the specification of design fires for use in fire safety engineering analysis of building and structures in the built environment. The design fire is intended to be used in an engineering analysis to determine consequences in fire safety engineering (FSE) analyses.

PDF Catalog

PDF Pages	PDF Title
2	undefined
7	Foreword
8	Introduction
9	1 Scope 2 Normative references 3 Terms and definitions
11	4 Symbols
14	5 The role of design fires in fire safety design
18	6 Considerations based on methods of analysis 7 Elements of a design fire 7.1 General
20	7.2 Incipient stage 7.3 Growth stage
21	7.4 Flashover 7.5 Fully developed stage
22	7.6 Events that change a design fire 7.6.1 General 7.6.2 Suppression systems 7.6.3 Intervention by fire services
23	7.6.4 Changes in ventilation 7.6.5 Enclosure effects 7.6.6 Combustible construction materials 7.7 Extinction and decay stage
24	8 Constructing a design fire curve 8.1 Procedure
25	8.2 Step 1 — Parameters provided by the design fire scenario
26	8.3 Step 2 — Fires involving single or multiple fuels 8.3.1 General
27	8.3.2 Develop the design fire curve for first item 8.3.3 Ignition of other items
28	8.3.4 Power law design fire curves
29	8.3.5 Wall and ceiling linings 8.3.6 Smouldering fires
30	8.4 Step 3 — Flashover 8.4.1 General 8.4.2 Empirical correlations for critical heat release rate for onset of flashover
31	8.5 Step 4 — Maximum heat release rate 8.5.1 General 8.5.2 Fuel-controlled fires
32	8.5.3 Ventilation-controlled fires
33	8.5.4 Mechanical ventilation 8.6 Step 5 — Modifying the design fire curve 8.6.1 Suppression systems
34	8.6.2 Fire service intervention 8.6.3 Changes in ventilation 8.6.4 Enclosure effects on mass loss rate of fuel
35	8.7 Step 6 — Fire duration 8.7.1 Duration of the fire growth stage 8.7.2 Duration of the steady burning stage
36	8.8 Step 7 — Decay 9 Species production 9.1 Species yields 10 Design fires for structural fire engineering 10.1 General
37	10.2 Localized fires 10.2.1 Flames not impinging the ceiling
38	10.2.2 Flames impinging the ceiling
39	10.3 Parametric fires
40	10.3.1 Heating phase
41	10.3.2 Heating duration and maximum temperature
42	10.3.3 Cooling phase 10.4 Fires in large compartments (travelling fires)
45	11 External design fires
46	12 Fire tests 13 Probabilistic aspects of design fires 13.1 General
47	13.2 Inclusion of statistical representativeness/distribution characteristics 13.3 Simulations using distributed input and sampling techniques
48	13.4 Stochastic models
49	13.5 Results of probabilistic analysis and their evaluation
50	14 Documentation
51	Annex A (informative) Data for development of design fires
57	Bibliography