Secondary ignition source
Sparks, arcs, hot objects, friction
Piloted ignition
Ignition aided by the presence of a separate external ignition source
Primary ignition source
Open flame, matches, lighters, torches
Self ignition
Temperature at which a material will ignite in the absence of any external pilot source of heat
700-900 Degrees
Average flame temperature of a match
70 %
Percent of American households using candles
Sparc
Super-heated incandescent particle
Arc
Flow of current across an air gap
Service
Conductors and equipment for delivering electricity from the supply to the equipment
Short circuit
Direct contact between a current carrying conductor and another conductor
RIP cigarettes
Reduced Ignition Propensity
Clinker
Glassy irregular mass created through self-heating of hay
20,000 amphers
Typical current of a lightning strike
165 to 513 degrees
Surface temperature of incandescent lightbulbs
Ignition matrix
Systematic method of evaluating and documenting possible ignition sources
Indicators
Observable and measurable changes in appearance caused by heat, flame or smoke
Fire pattern
Indicators of damage (or lack of damage) created by a combination of smoke, flames, and heat affects
Dropdown
Collapse of burning material in a room that induces separate, low-level igntion
Beveling
Recognizable edges of burned material pointing to the direction of fire spread
Heat horizon
Demarcation of fire damage revealed by the charring, burning, or discoloration of paint or wall coverings
Smoke horizon
Surface deposits that reveal the height at which smoke and soot stained the walls without heat damage
Ignitable liquid
Classification for liquid fuels including both flammable and combustible classes
Protected areas
Areas not damaged by flames due to location of objects in burn room or general type of object
Arc mapping
Plotting of electric arcing in electrical wiring found at a fire scene
Hard times
Actual time that can be linked directly or indirectly to an accurate and reliable source
Soft times
Estimate of clock time by witnesses or engineering analysis
Structure shell
The outermost part of a building
Type 1 construction
Non combustible protected construction type (concrete)
Type 2 construction
Steel construction type
Type 3 construction
Ordinary block (Masonry) construction type
Type 4 construction
Heavy timber construction type
Type 5 construction
Wood frame construction type
Pin holes
Small openings in gypsum boards that provides a path for fire, smoke, or heat