BS PD IEC TR 60695-7.3 : 1998
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
21-05-2004
23-11-2012
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principles of toxic hazard assessment
5 Methods of toxic hazard assessment
5.1 Background on fire hazard assessment
5.2 Toxic hazard assessment
5.2.1 General approach
5.2.2 Fractional effective dose (FED)
5.2.3 Approaches to estimating exposure dose, (Ct)
5.3.4 Approaches to expressing toxic potency
6 Effluent components to be measured and toxic potency values
6.1 Minimum reporting
6.1.1 Gaseous fire effluent components
6.1.2 Other components
6.2 Additional reporting
Annex A (informative) Secondary effects of fire conditions on
toxic hazards
A.1 General
A.2 Effects of irritants
A.3 Interaction of carbon dioxide and carbon monoxide
A.4 Effects of oxygen depletion
A.5 Effects of elevated temperatures (heat stress)
A.6 Effects of stratification and transport of fire atmospheres
Annex B (informative) Guidance for the use of LC50 values
B.1 General
B.2 Limiting hazard
B.3 Use of LC50 values in specific types of fires
B.3.1 Smouldering fires
B.3.2 Flaming, pre-flashover fires
B.3.3 Flaming, post-flashover fires
B.3.3.1 General
B.3.3.2 Enhanced carbon monoxide
B.3.3.3 Simplification of LC50 values
Annex C (informative) Simple worked example to illustrate the
principles of a toxic hazard analysis
C.1 The problem scenario
C.2 Information available
C.3 Hazard analysis
Figures
1 Total FED and each contributor, both are time-dependent
2 Typical time dependence of smoke concentration
3 Time dependent behaviour of the components of fire hazard
Bibliography
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