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BS 5950-8:2003

$145.91

Structural use of steelwork in building – Code of practice for fire resistant design

Published By Publication Date Number of Pages
BSI 2003 44
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PDF Pages PDF Title
1 BRITISH STANDARD
2 Committees responsible for this British�Standard
3 Contents
7 1 Scope
2 Normative references
8 3 Terms and definitions
3.1critical element
3.2 design temperature
3.3 element
3.4 fire exposure
3.5 fire protection material
3.6 fire resistance
3.7 insulation
3.8 integrity
3.9 limiting temperature
3.10 load capacity
3.11 natural fires
9 3.12 standard fire
3.13 standard fire test
3.14 structural member
3.15 thermal expansion
4 Major symbols
5 General principles
5.1 Aims of fire precautions
5.2 Structural performance requirements
10 5.3 Methods of design
5.4 Fire exposure
5.5 Thermal response
5.6 Structural response
6 Structural members in fire
6.1 Properties at elevated temperature
11 Figure 1 Thermal elongation of steel
12 Figure 2 Variation of specific heat with temperature for steel
13 Figure 3 Variation of thermal conductivity with temperature for steel
15 Figure 4 Variation of thermal elongation with temperature for normal weight and lightweight concrete
16 Figure 5 Variation of specific heat with temperature for normal weight and lightweight�concrete
17 Figure 6 Variation of thermal conductivity with temperature for normal weight and lightweight concrete
6.2 Strength retention factors
18 Table 1
Table 2
19 Table 3
Table 4
6.3 Strain levels
20 7 Fire limit states
7.1 General
Table 5
7.2 Material strength factors
7.3 Performance criteria
21 7.4 Bracing members
7.5 Re-use of steel after a fire
8 Evaluation of fire performance
8.1 General
8.2 Section factor
22 8.3 Fire performance derived from testing
23 Table 6
24 Table 7
25 8.4 Fire performance derived from calculation
27 Table 8
28 Table 9
29 Table 10
31 8.5 Portal frames
8.6 Concrete-filled hollow section columns
Table 11
8.7 Water-filled structures
32 8.8 External bare steel
8.9 Floor and roof slabs
33 Table 12
Figure 7 Measurement of depth into concrete slab
Figure 8 Insulation thickness for trapezoidal profiled steel sheets
34 Figure 9Insulation thickness for re-entrant profiled steel sheets
Table 13
Table 14
Figure 10 Effect of beam deflection on a fire-resisting wall
35 8.10 Walls
8.11 Roofs
8.12 Ceilings
37 Annex A (normative) Strength retention factors for cold formed steels complying with BS�EN�10143
Table A.1
Annex B(normative) Re-use of steel after a fire
39 Annex C (normative) Simplified method of calculation for beams with shelf angles
40 Temperature profile
Embedded steelwork
Figure C.1 Temperature blocks for beams with shelf angles
41 Table C.1
Table C.2
Figure C.2 Definition of dimension
42 Figure C.3 Definition of blocks 4, 5 and 6
BS 5950-8:2003
$145.91