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Figure 6 - Bank-and-Roll Technique
CLASS D APPLICATION
In Class D fires, as with Class A, the situation will dictate the appropriate
adjustment of the nozzle, but a non-aspirated nozzle is appropriate for most
applications. The product concentration for Class D fires is 6 percent (fig. 7).
NOTE: Powdered metals in densely packed containers which have a pre-burn
sufficient to allow deep seated combustion will crust over when the formula is applied.
The crust of metal oxide will prohibit the agent from reaching the core of the
combustion. Mechanical means are necessary to penetrate the crust to the core. Extreme
caution is required.
Figure 7 - Class A, B, and D Application
MULTIPLE CLASS APPLICATION
In multiple class fires a 6 percent concentration is recommended for maximum
flexibility to the fire fighter. For general application to structure fires (Class A) a 3
percent concentration is recommended. To provide protection to adjacent structures,
wooded areas, or grass-lands apply a 6 percent barrier coating.
Appendix A is the standard operating procedure used by the Fire Department of
the Fire District of Roosevelt, Long Island, New York. It provides an approach that will
generally apply to many structural fire situations.
