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BSI PD 7974-6:2004

$198.66

The application of fire safety engineering principles to fire safety design of buildings – Human factors. Life safety strategies. Occupant evacuation, behaviour and condition (Sub-system 6)

Published By Publication Date Number of Pages
BSI 2004 54
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PDF Catalog

PDF Pages PDF Title
1 PUBLISHED DOCUMENT
2 Committees responsible for this Published�Document
3 Contents
4 Foreword
5 Introduction
6 1 Scope
7 2 Normative references
3 Terms and definitions
3.1 alarm time
3.2 Available Safe Escape Time
3.3 compartment
8 3.4 enclosure
3.5 escape time
3.6 evacuation time
3.7 exit
3.8 fire scenario
3.9 management
3.10 means of escape
3.11 phased evacuation
3.12 presentation time
3.13 place of safety
3.14 pre-movement time
9 3.15 Required Safe Escape Time
3.16 tenability criteria
3.17 travel distance
3.18 travel time
3.19 walking speed
3.20 walking time
4 Principles
4.1 General
4.2 The basis of performance-based design
10 4.3 ASET calculations
4.4 RSET calculations
Figure 1
11 4.5 Margin of safety
4.6 Elements used in quantification of RSET
12 5 Design behavioural scenarios for quantification of pre-movement and travel times
5.1 General
13 Table 1
14 5.2 Major behavioural modifiers in each scenario category
15 5.3 Estimation of pre-movement times based on design behavioural scenario
16 5.4 Estimation of travel times based on design behavioural scenario
5.5 Interactions between pre-movement time, walking time and exit flow time for evacuation time c…
17 5.6 Calculation of escape and evacuation times for single enclosures and for multi-storey or mult…
18 6 Occupant condition
6.1 Effects fire effluent and heat on ASET and RSET
19 6.2 Simple criteria for tenability based upon zero exposure
6.3 Tenability in relation to willingness to enter or ability to move through smoke
20 6.4 Tenability criteria for smoke – ability to move through smoke
6.5 Effects of smoke on walking speed
6.6 Tenability criteria for exposure to fire and heat
21 6.7 Tenability criteria for toxic gases
22 7 Summary
25 Annex A (normative)
Default alarm times
A.1 Effect of alarm system on alarm time
A.1.1 Level A1 alarm system
A.1.2 Level A2 (two stage) alarm system
A.1.3 Level A3 alarm system
A.2 Effect of evacuation strategy on alarm time
Annex B (normative)
Pre-movement behaviours and determinants
B.1 The two components of pre-movement time
B.2 Recognition
26 B.3 Response
27 Annex C (normative)
Default pre-movement time distribution data and derivations
C.1 General
28 Figure C.1
Figure C.2
29 Table C.1
30 C.2 A: Awake and familiar
C.3 B: Awake and unfamiliar
C.4 C: Sleeping
31 C.5 D and E medical care, transportation
Annex D (normative)
Guidance on travel speeds and flow rates
D.1 Horizontal travel speeds
32 D.2 Vertical travel speeds
Table D.1
D.3 Maximum flow rates
33 Table D.2
Table D.3
34 Table D.4
Annex E (normative)
Detailed information required for ASET and RSET calculations
E.1 General
E.2 The building characteristics and fire safety management strategy
E.2.1 Building characteristics, its management in relation to fire safety and the emergency life safety…
35 E.2.2 The occupant characteristics
E.2.3 The fire simulation dynamics
36 E.3 Intervention effects
Annex F (normative)
Features of design behavioural scenario categories
F.1 Category A: Occupants awake and familiar
37 F.2 Category B: Occupants awake and unfamiliar
F.3 Category C: Sleeping
38 F.4 Category D Medical care
F.5 Category E Transportation
F.5.1 Buildings
F.5.2 Vehicles
39 Annex G (normative)
Effects of smoke on walking speed and proposed tenability�endpoints for smoke, toxic …
Figure G.1
40 Table G.1
41 Table G.2
Table G.3
Annex H (informative)
Generic worked examples for a number or design behavioural�scenarios
H.1 Awake and familiar: Example — Escape and evacuation times for office accommodation
H.1.1 General
H.1.2 Time to detection
42 H.1.3 Time to general warning
H.1.4 Pre-movement times for first few occupants and pre-movement time distributions
H.1.5 Walking times
H.1.6 Time to queue and flow time
43 H.1.7 Summary for offices
44 H.2 Awake and unfamiliar: Example 1 — Escape and evacuation times in a retail enclosure
H.2.1 General
H.2.2 Time to detection
H.2.3 Time to general warning
45 H.2.4 Pre-movement times for first few occupants and pre-movement time distributions
H.2.5 Walking times
H.2.6 Time to queue
H.2.7 Summary for retail
46 H.3 Awake and unfamiliar: Example 2 — Escape and evacuation times in an assembly enclosure
47 H.4 Sleeping and unfamiliar: Example — Escape and evacuation times in a hotel
48 H.5 Sleeping and familiar: Examples — Escape and evacuation times in a dwelling house, flat or maison…
H.5.1 Domestic dwellings
H.5.2 HMO
H.5.3 Hotel, boarding house
49 H.5.4 Hall of residence/residential college/hostel
H.6 Institutional
H.6.1 Hospital, nursing home, old peoples’ home, care home/centre
H.6.2 Day centre, surgery, clinic, dentist, nursery, health centre
H.6.3 Education: school, nursery school, adult training centre
Annex I (informative)
Example of interactions calculations
50 Figure I.1
52 Bibliography
BSI PD 7974-6:2004
$198.66