Citation

Gann RG. Fire Technol. 2004; 40(2): 201-207.

Copyright

(Copyright © 2004, Holtzbrinck Springer Nature Publishing Group)

DOI

10.1023/B:FIRE.0000016843.38848.37

PMID

unavailable

Abstract

Fire hazard and risk analyses establish the basis for providing conditions of safety for people, including those that are more sensitive to fire smoke than others. For this purpose, this paper develops a method for estimating, from information on lethal and incapacitating exposures for rats, smoke toxic potency values for incapacitation of smoke-sensitive people. For those engineering applications where the mix of combustibles is unknown, generic values are derived of the concentration of smoke that would incapacitate smoke-sensitive people in 5 min: 6 g/cubic meter for a well-ventilated fire and 3 g/cubic meter for an underventilated (e.g., post-flashover) fire. These values are estimated with significant assumptions in their derivation, resulting in an estimated uncertainty of about a factor of two. Further, there is a wide range of smoke toxic potency values reported for various combustibles, and some of these will lead to values significantly higher or lower than these generic figures.