Fire Investigator: Principles and
Practice to NFPA 921 and 1033,
Fourth Edition.
Accelerant - ANS-Any gas or oxidizer, frequently an ignitable liquid, used to initiate a hearth
or increase the fee of increase or pace the unfold of fireplace.
ANS stands for unintended fires—fires for which no planned human motion was worried in
igniting or spreading the hearth into an area in which it should not be. Accommodation
Space - ANS-A area on a vessel designed for people to stay in.
Any kind of fireplace safety device that mechanically kicks in whilst a fireplace is detected.
Active Fire Protection System - ANS Addressable Technology - ANS-Fire alarm and
detection systems wherein devices and device components are assigned a records address,
are capable of two-manner conversation, and may carry out positive sports based on signal
enter.
Adolescent Firesetters - ANS-Adolescents, ages 14 to 16 years, who're frequently
answerable for fires that occur at places other than their houses.
Adrift - ANS-Loose, no longer on moorings or towline.
Aerial Fuels - ANS-All green or useless substances positioned in the forest cover.
Affidavit - ANS-A voluntary written statement of fact or opinion made underneath oath and
signed via the writer.
Afloat - ANS-Floating in water; not sinking.
Air Drop - ANS-The aerial application of water, foam, or retardant aggregate at once onto
the fire or threatened place or along a strategic function ahead of the fire.
Air Entrainment - ANS-The procedure of air or gases being drawn into a hearth, plume, or
jet.
Air Sampling Smoke Detection - ANS-A technique of smoke detection designed to draw air
from the included vicinity right into a detection chamber for analysis.
Alarm Pressure Switch - ANS-A form of starting up device installed on all varieties of
moist-based hearth suppression systems; the tool initiates a fire alarm sign as soon as a
water stress threshold is met.
Alarm Signal - ANS-A warning sign that signals occupants of a hearth emergency.
Alloying - ANS-The combination of or more metals wherein one or more of the metals is in
a liquefied country.
Alternating Current (AC) - ANS-The voltage varies in time with a sine wave at 60 cycles in
keeping with 2nd. A sine-wave modern outcomes if the load is resistive.
Ambient Temperature - ANS-Air temperature of the encircling environment.
Ampacity - ANS-The present day, in amperes, that a conductor can convey continuously
underneath the conditions of use with out exceeding its temperature rating.
Amperage - ANS-The unit of electrical modern this is equivalent to a go with the flow of 1
coulomb in keeping with 2d; one coulomb is described as 6.24 x 10^18 (18th power)
electrons.
, Annunciation Panel - ANS-A device that makes use of indicating lamps, alphanumeric
presentations, or other means to provide first responders with status, condition, and vicinity
records regarding fireplace alarm device additives and devices.
Arc - ANS-A high-temperature luminous electric discharge across an opening where the
conductor is missing or thru a medium inclusive of charred insulation.
Arc Mapping - ANS-The analysis of the locations where electrical arcing has prompted
damage and the documentation of the concerned electric circuits.
Arc Survey Diagrams - ANS-Locations of electrical arcing are identified and plotted on a
diagram of the affected region of the structure. The spatial courting of the arc sites can
create a pattern and assist set up the series of harm. This evaluation can be used on
building circuits and electrical devices within a compartment to help become aware of or slim
the region of origin.
Arc Tube - ANS-A cylinder of fused silica/quartz with electrodes at either give up that is
used in most mercury and metallic halide lamps.
Arc-Fault Circuit Interrupter (AFCI) - ANS-Designed to defend in opposition to fires because
of arcing faults in home electric wiring. The circuitry constantly video display units
cutting-edge drift.
Arced and Severed - ANS-Occurs when wires are arced off on the ends and feasible
segmented wires end result.
The room, structure, or different general region wherein the point of origin is located (ANS).
Arson - ANS-The crime of maliciously and deliberately, or recklessly, starting a fireplace or
causing an explosion. Legal definitions of "arson" are described via statues and judicial
selections that adjust amongst jurisdictions.
Aspect - ANS-The course the slope faces (N, E, S, W).
Assemblies - ANS-Manufactured components put together to make a completed product.
The lowest temperature at which a combustible substance ignites in air with out a spark or
flame is called the autoignition temperature (AIT) in ANS. Backflow Valve - ANS-Prevents
fuel from re-coming into a field or combustion device.
Balanced Pressure Proportioner - ANS-A proportioner that makes use of an atmospheric
tank and pump to introduce the foam pay attention into the machine with the water deliver.
Balloon Frame Construction - ANS-A creation kind in which the outside wall studs go from
the foundation wall to the roofline. The floor joists are attached to the partitions by the usage
of a ribbon board, which creates an open stud channel between floors, which includes the
basement and attic.
Bar Holes - ANS-Holes driven into the surface of the ground or pavement with both
weighted metal bars or drills. Gas detectors are then inserted into the holes with a purpose
to hit upon the location of a fuel leak.
Benchmark Events - ANS-Events which might be mainly precious as a basis for the timeline
or may additionally have substantial relation to the motive, spread, detection, or
extinguishment of a fire.
Beveling - ANS-A fire sample that indicate fireplace direction on wood wall studs. The bevel
leans in the direction of the direction of tour.
Bilges - ANS-The lowest, indoors part of a vessel's hull; the location in which spilled water
and oil can gather.
Blast Overpressure - ANS-Large quantities of gasoline being produced via the explosion of
the material.
BLEVE - ANS-Boiling Liquid Expanding Vapor Explosion.
, Blow Holes - ANS-Visible holes in the conduit or metallic panels of department circuits.
They are an illustration of big arcing and power release inside the enclosure or conduit.
Boat - ANS-Any vessel that can be positioned or stored on some other vessel.
Branch Circuits - ANS-The individual circuits that feed lighting fixtures, receptacles, and
diverse constant home equipment.
Bulkheads - ANS-The vertical separations in a vessel that form cubicles and that
correspond to walls in a constructing. The time period does no longer discuss with the
vertical sections of a vessel's hull.
Burning Velocity - ANS-The charge of flame propagation relative to the rate of the unburned
fuel ahead of it.
Calcination - ANS-A fire effect realized in gypsum merchandise, which include wallboard,
due to exposure to warmth that drives off free and chemically certain water.
Carboxyhemoglobin (COHb) - ANS-The carbon monoxide saturation inside the blood.
Catalytic Converter - ANS-A tool within the exhaust machine that exposes exhaust gases to
a catalyst metal to promote oxidation of hydrocarbon substances inside the exhaust gas.
Ceiling Jet - ANS-A fantastically thin layer of flowing hot gases that develops underneath a
horizontal floor (e.G., ceiling) due to plume impingement and the flowing gasoline being
forced to move horizontally.
Central Station Service - ANS-A facility that receives fireplace alarm signals from
residences that is staffed with educated, qualified, and talented personnel who take the
proper motion to procedure, document, respond, and keep monitored fireplace alarm
systems.
Chain of Custody - ANS-The trail of responsibility that files the possession of evidence in an
research.
Char - ANS-Carbonaceous fabric that has been burned or pyrolyzed and has a blackened
appearance.
Chemical Explosion - ANS-Explosion wherein a chemical response is the supply of the
excessive-strain gasoline gasoline. The fundamental nature of the gasoline is changed.
Child Firesetters - ANS-Children, a long time 2 to six years, who're often accountable for
fires in their homes or in the immediate area.
Circumstantial Evidence - ANS-Facts that generally attend other records to be tested and
are drawn through logical inference from them in preference to private information.
Class A Foam - ANS-A mechanically generated aggregation of bubbles that have a lower
density than water.
Clean Burn - ANS-A hearth effect that looks on noncombustible surfaces after any
combustible layers (consisting of soot, paint, and paper) had been burned away. The effect
may also appear in which soot become no longer deposited due to high surface
temperatures.
Coded Signal - ANS-A signal that generates a predetermined visual or audible pattern to
perceive the place of the starting up device this is working.
Cognitive Testing - ANS-The use of someone's questioning abilities and judgment so that it
will examine the empirical statistics and mission the conclusions of the final hypothesis.
The distance that surrounds a structure that is probably tormented by a structural crumble is
known as the crumble area (ANS). The area should be identified by markers or specialized
scene tape that shows there may be a capacity for a structural fall apart.
Combustible Gas Indicator - ANS-An tool that samples air and indicates whether or not
flamable vapors are present. Some units might also suggest the proportion of the decrease
explosive restriction of the air/gas mixture.
Practice to NFPA 921 and 1033,
Fourth Edition.
Accelerant - ANS-Any gas or oxidizer, frequently an ignitable liquid, used to initiate a hearth
or increase the fee of increase or pace the unfold of fireplace.
ANS stands for unintended fires—fires for which no planned human motion was worried in
igniting or spreading the hearth into an area in which it should not be. Accommodation
Space - ANS-A area on a vessel designed for people to stay in.
Any kind of fireplace safety device that mechanically kicks in whilst a fireplace is detected.
Active Fire Protection System - ANS Addressable Technology - ANS-Fire alarm and
detection systems wherein devices and device components are assigned a records address,
are capable of two-manner conversation, and may carry out positive sports based on signal
enter.
Adolescent Firesetters - ANS-Adolescents, ages 14 to 16 years, who're frequently
answerable for fires that occur at places other than their houses.
Adrift - ANS-Loose, no longer on moorings or towline.
Aerial Fuels - ANS-All green or useless substances positioned in the forest cover.
Affidavit - ANS-A voluntary written statement of fact or opinion made underneath oath and
signed via the writer.
Afloat - ANS-Floating in water; not sinking.
Air Drop - ANS-The aerial application of water, foam, or retardant aggregate at once onto
the fire or threatened place or along a strategic function ahead of the fire.
Air Entrainment - ANS-The procedure of air or gases being drawn into a hearth, plume, or
jet.
Air Sampling Smoke Detection - ANS-A technique of smoke detection designed to draw air
from the included vicinity right into a detection chamber for analysis.
Alarm Pressure Switch - ANS-A form of starting up device installed on all varieties of
moist-based hearth suppression systems; the tool initiates a fire alarm sign as soon as a
water stress threshold is met.
Alarm Signal - ANS-A warning sign that signals occupants of a hearth emergency.
Alloying - ANS-The combination of or more metals wherein one or more of the metals is in
a liquefied country.
Alternating Current (AC) - ANS-The voltage varies in time with a sine wave at 60 cycles in
keeping with 2nd. A sine-wave modern outcomes if the load is resistive.
Ambient Temperature - ANS-Air temperature of the encircling environment.
Ampacity - ANS-The present day, in amperes, that a conductor can convey continuously
underneath the conditions of use with out exceeding its temperature rating.
Amperage - ANS-The unit of electrical modern this is equivalent to a go with the flow of 1
coulomb in keeping with 2d; one coulomb is described as 6.24 x 10^18 (18th power)
electrons.
, Annunciation Panel - ANS-A device that makes use of indicating lamps, alphanumeric
presentations, or other means to provide first responders with status, condition, and vicinity
records regarding fireplace alarm device additives and devices.
Arc - ANS-A high-temperature luminous electric discharge across an opening where the
conductor is missing or thru a medium inclusive of charred insulation.
Arc Mapping - ANS-The analysis of the locations where electrical arcing has prompted
damage and the documentation of the concerned electric circuits.
Arc Survey Diagrams - ANS-Locations of electrical arcing are identified and plotted on a
diagram of the affected region of the structure. The spatial courting of the arc sites can
create a pattern and assist set up the series of harm. This evaluation can be used on
building circuits and electrical devices within a compartment to help become aware of or slim
the region of origin.
Arc Tube - ANS-A cylinder of fused silica/quartz with electrodes at either give up that is
used in most mercury and metallic halide lamps.
Arc-Fault Circuit Interrupter (AFCI) - ANS-Designed to defend in opposition to fires because
of arcing faults in home electric wiring. The circuitry constantly video display units
cutting-edge drift.
Arced and Severed - ANS-Occurs when wires are arced off on the ends and feasible
segmented wires end result.
The room, structure, or different general region wherein the point of origin is located (ANS).
Arson - ANS-The crime of maliciously and deliberately, or recklessly, starting a fireplace or
causing an explosion. Legal definitions of "arson" are described via statues and judicial
selections that adjust amongst jurisdictions.
Aspect - ANS-The course the slope faces (N, E, S, W).
Assemblies - ANS-Manufactured components put together to make a completed product.
The lowest temperature at which a combustible substance ignites in air with out a spark or
flame is called the autoignition temperature (AIT) in ANS. Backflow Valve - ANS-Prevents
fuel from re-coming into a field or combustion device.
Balanced Pressure Proportioner - ANS-A proportioner that makes use of an atmospheric
tank and pump to introduce the foam pay attention into the machine with the water deliver.
Balloon Frame Construction - ANS-A creation kind in which the outside wall studs go from
the foundation wall to the roofline. The floor joists are attached to the partitions by the usage
of a ribbon board, which creates an open stud channel between floors, which includes the
basement and attic.
Bar Holes - ANS-Holes driven into the surface of the ground or pavement with both
weighted metal bars or drills. Gas detectors are then inserted into the holes with a purpose
to hit upon the location of a fuel leak.
Benchmark Events - ANS-Events which might be mainly precious as a basis for the timeline
or may additionally have substantial relation to the motive, spread, detection, or
extinguishment of a fire.
Beveling - ANS-A fire sample that indicate fireplace direction on wood wall studs. The bevel
leans in the direction of the direction of tour.
Bilges - ANS-The lowest, indoors part of a vessel's hull; the location in which spilled water
and oil can gather.
Blast Overpressure - ANS-Large quantities of gasoline being produced via the explosion of
the material.
BLEVE - ANS-Boiling Liquid Expanding Vapor Explosion.
, Blow Holes - ANS-Visible holes in the conduit or metallic panels of department circuits.
They are an illustration of big arcing and power release inside the enclosure or conduit.
Boat - ANS-Any vessel that can be positioned or stored on some other vessel.
Branch Circuits - ANS-The individual circuits that feed lighting fixtures, receptacles, and
diverse constant home equipment.
Bulkheads - ANS-The vertical separations in a vessel that form cubicles and that
correspond to walls in a constructing. The time period does no longer discuss with the
vertical sections of a vessel's hull.
Burning Velocity - ANS-The charge of flame propagation relative to the rate of the unburned
fuel ahead of it.
Calcination - ANS-A fire effect realized in gypsum merchandise, which include wallboard,
due to exposure to warmth that drives off free and chemically certain water.
Carboxyhemoglobin (COHb) - ANS-The carbon monoxide saturation inside the blood.
Catalytic Converter - ANS-A tool within the exhaust machine that exposes exhaust gases to
a catalyst metal to promote oxidation of hydrocarbon substances inside the exhaust gas.
Ceiling Jet - ANS-A fantastically thin layer of flowing hot gases that develops underneath a
horizontal floor (e.G., ceiling) due to plume impingement and the flowing gasoline being
forced to move horizontally.
Central Station Service - ANS-A facility that receives fireplace alarm signals from
residences that is staffed with educated, qualified, and talented personnel who take the
proper motion to procedure, document, respond, and keep monitored fireplace alarm
systems.
Chain of Custody - ANS-The trail of responsibility that files the possession of evidence in an
research.
Char - ANS-Carbonaceous fabric that has been burned or pyrolyzed and has a blackened
appearance.
Chemical Explosion - ANS-Explosion wherein a chemical response is the supply of the
excessive-strain gasoline gasoline. The fundamental nature of the gasoline is changed.
Child Firesetters - ANS-Children, a long time 2 to six years, who're often accountable for
fires in their homes or in the immediate area.
Circumstantial Evidence - ANS-Facts that generally attend other records to be tested and
are drawn through logical inference from them in preference to private information.
Class A Foam - ANS-A mechanically generated aggregation of bubbles that have a lower
density than water.
Clean Burn - ANS-A hearth effect that looks on noncombustible surfaces after any
combustible layers (consisting of soot, paint, and paper) had been burned away. The effect
may also appear in which soot become no longer deposited due to high surface
temperatures.
Coded Signal - ANS-A signal that generates a predetermined visual or audible pattern to
perceive the place of the starting up device this is working.
Cognitive Testing - ANS-The use of someone's questioning abilities and judgment so that it
will examine the empirical statistics and mission the conclusions of the final hypothesis.
The distance that surrounds a structure that is probably tormented by a structural crumble is
known as the crumble area (ANS). The area should be identified by markers or specialized
scene tape that shows there may be a capacity for a structural fall apart.
Combustible Gas Indicator - ANS-An tool that samples air and indicates whether or not
flamable vapors are present. Some units might also suggest the proportion of the decrease
explosive restriction of the air/gas mixture.
