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Re: High Temperature Accelerants (HTA)
Posted by: SCarman (IP Logged)
Date: May 15, 2010 12:33PM

The sections in NFPA 921 dealing with the concept of High Temperature Accelerants are as follows:

22.2 Incendiary Fire Indicators. Mixtures of fuels and Class 3 or
Class 4 oxidizers (see NFPA 430, Code for the Storage of Liquid and
Solid Oxidizers) may produce an exceedingly hot fire and may
be used to start or accelerate a fire. Some of these oxidizers,
depending on various conditions, can self ignite and will cause
the same type of fire growth. Thermite mixtures also produce
exceedingly hot fires. Such accelerants generally leave residues
that may be visually or chemically identifiable. Presence
of remains from the oxidizers does not in itself constitute an
intentionally set fire. (See 5.7.4.1.5.)

22.2.4.1 Exotic accelerants have been hypothesized as having
been used to start or accelerate some rapidly growing fires and
were referred to in these particular instances as high temperature
accelerants (HTA). Indicators of exotic accelerants include
an exceedingly rapid rate of fire growth, brilliant flares (particularly
at the start of the fire), and melted steel or concrete.
A study of 25 fires suspected of being associated with HTAs
during the 19811991 period revealed that there was no conclusive
scientific proof of the use of such HTA.

22.2.4.2 In any fire where the rate of fire growth is considered
exceedingly rapid, other reasons for this should be considered
in addition to the use of an accelerant, exotic or otherwise.
These reasons include ventilation, fire suppression
tactics, and the type and configuration of the fuels.

A.22.2.4 See Carman, S. High Temperature Accelerants, A Study of
HTA Fires Reported in the United States and Canada Between January
1981 and August 1991. Sacramento, CA: U.S. Bureau of
Alcohol, Tobacco and Firearms, October 1994.



Subject Views Written By Posted
  High Temperature Accelerants (HTA) 650 Sir Gary 05/15/2010 08:52AM
  Re: High Temperature Accelerants (HTA) 608 SCarman 05/15/2010 10:42AM
  Re: High Temperature Accelerants (HTA) 326 jaudio 05/15/2010 12:18PM
  Re: High Temperature Accelerants (HTA) 332 SCarman 05/15/2010 12:31PM
  Re: High Temperature Accelerants (HTA) 939 SCarman 05/15/2010 12:33PM
  Re: High Temperature Accelerants (HTA) 326 PMK140 05/15/2010 06:27PM
  Re: High Temperature Accelerants (HTA) 289 efc 05/15/2010 12:51PM
  Re: High Temperature Accelerants (HTA) 305 Nick Markowitz 05/15/2010 01:10PM
  Re: High Temperature Accelerants (HTA) 296 PMK140 05/15/2010 06:41PM
  Re: High Temperature Accelerants (HTA) 334 Gerald Hurst 05/15/2010 11:54PM
  Re: High Temperature Accelerants (HTA) 282 PMK140 05/16/2010 04:18AM
  Re: High Temperature Accelerants (HTA) 308 Gerald Hurst 05/16/2010 08:48PM
  Re: High Temperature Accelerants (HTA) 271 jmorse 05/16/2010 09:29PM
  Re: High Temperature Accelerants (HTA) 284 jaudio 05/16/2010 06:52AM
  Re: High Temperature Accelerants (HTA) 293 cda 05/15/2010 06:53PM
  Re: High Temperature Accelerants (HTA) 427 Nick Markowitz 05/16/2010 06:03AM
  Re: High Temperature Accelerants (HTA) 324 Sir Gary 05/16/2010 09:19AM
  Re: High Temperature Accelerants (HTA) 285 Nick Markowitz 05/18/2010 10:01PM
  Re: High Temperature Accelerants (HTA) 476 dcarpenter 05/19/2010 04:28PM
  Re: High Temperature Accelerants (HTA) 296 dcarpenter 05/19/2010 04:38PM


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