22 Post-Fire Analysis Flashcards
The fire service should consider analyzing significant fires by:
- Documenting them on fact sheets
- Diagramming the fire building
- Photographing the fire scene after ops
A post-fire analysis is a:
strategy, tactics, and safety investigation from the POV of a fireground commander.
To complete part one of a fireground analysis, the chief officer must:
- revisit the site of the fire and examine the burned-out structure
- Interview FFs who were there
- Study information collected for the official fire record
Two important facts of the fire analysis fact shee are:
- The point of origin
- Cause of the fire
Known reoccurring fire spread weakness associated with fire-resistive buildings…
Central Air/ HVAC System
Known reoccurring fire spread weakness associated with noncombustible buildings…
Combustible roof deck allows the spread of flame and smoke
Known reoccurring fire spread weakness associated with ordinary construction…
Concealed voids and spaces allow fire spread
Known reoccurring fire spread weakness associated with heavy timber buildings…
Large amounts of structural fire loading, combined with unprotected window openings, create tremendous radiated heat waves which spread fire to exposed buildings
Known reoccurring fire spread weakness associated with wood frame…
Combustible exterior walls with small horizontal separations between buildings
General collapse characteristics of fire-resistive buildings:
- Fire-resistive concrete buildings suffer localized ceiling collapse by spalling chucks
- Secondary steel floor support beams of fire-resistive steel skeleton buildings separate from the main girder at the connection
General collapse characteristics of noncombustible buildings:
suffer early roof collapse
General collapse characteristics of Ordinary construction:
Parapet walls
General collapse characteristics of heavy timber buildings:
Fully involved burning heavy timber constructed buildings suffer floor collapse followed by masonry wall collapse.
General collapse characteristics of wood-frame buildings:
suffer bearing-wall collapse with instantaneous floor collapse.
The most frequent causes of burning building collapse are:
- Fire destruction
- Explosion
- Backdraft
- BLEVE
- Impact of hose streams
- Water accumulation
- Ice formation from hose streams
The company’s _________ are procedures that achieve the fireground strategy.
tactics
Tactics came before strategies.
The officer preparing the fire analysis diagram should identify what on it?
- Point of fire origin
- Area of fire damage
- exact position of fatalities
- Hose line and ladder placement
- Collapse and explosion destruction
The diagram should be an overhead line drawing with exposure I [alpha] at ________.
The bottom of the page
Information for the top of the page:
- Date and time of fire
- Alarm box number
- Address of fire building
Information for the lower left of the page:
- Construction type
- height in stories
- width and length
An important strategy consideration that must be shown on the post-fire analysis diagram is the…
Wind direction
A ___________________ of a fire site is the third and most important part of a post-fire analysis.
photographic documentation
The purpose of part three of a post-fire analysis is to:
supplement the information and facts compiled in the fire analysis fact sheet and the diagram.
