Explosions - ✔✔Dust explosions: most often occur in confined areas of
relatively wide dispersal.
Explosions - ✔✔Search 1.5 times further than the farthest piece of debris.
Fire effects/ fire patterns - ✔✔Char shrinks as it forms. More reliable for
evaluating fire spread, deduce the direction based on depth, large shiny
blisters (alligatoring) is not evidence of the use of an accelerant.
Fire effects/fire patterns - ✔✔Spalling: loss of surface material due to
cracking, breaking, chipping, breakdown in surface tensile strength,
moisture present in the concrete, may appear lighter in color.
Fire effects/fire patterns - ✔✔Crazed glass: caused by rapid cooling.
Fire effects/fire patterns - ✔✔Light bulbs 25W or more "pull" (gases expand
and bubble out); 25W or less contain a vacuum and can pull in.
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