Ch 5 Flashcards
(60 cards)
Definition - an injury sustained during the duties, responsibilities, and functions of a fire department member
An occupational injury per NFPA 1500
Most firefighter fatalities occur in these buildings:
Homes, dwellings and apartments. Because most fires occur in these buildings.
2.6 per 100,000
The probability of a firefighter fatality is much greater than these types of buildings:
Manufacturing occupancies.
22.5 per 100,000
The two leading causes of on duty firefighter fatalities at structure fires are
Sudden cardiac events (almost one third)
and asphyxiation
According to the book, a 30 minute air bottle usually provides about how much time
About 20 minutes.
Low air alarms should sound with 33% remaining.
Probably the most important element of the incident safety program is applying
Applying risk management to fire grant operations. Specifically addressed by NFPA 1500.
The single, most important ability the fire officer must acquire, is being skilled at recognizing:
The point at which the risk to firefighters lives outweigh the possible benefits of saving lives and property.
The concept of probability is important to the risk management process. The officer must consider the possibility of people being in a building by:
Not as a yes, or no proposition, but as a degree of probability. And even the probability of savable people.
The contents of the building and the combustible building materials contribute to the buildings:
Fire/fuel load.
The primary fuel load for most structure fires is made up of the combustible contents
The Time to flash over in modern residential building buildings versus legacy residential buildings due to increased fuel load has increased from
29 1/2 minutes in legacy buildings to 3 1/2 minutes in modern furniture buildings 
Building loads are divided into these six
Dead loads
Live loads
Seismic loads
Wind loads
Snow loads
Ice loads
Based on type III ordinary construction
This rule states that when a heavy volume of fire is burning out of control on two or more floors for 20 minutes or longer, structural collapse should be anticipated.
The 20– Minute rule
The subjective or questionable elements in the 20 minute rule are
How heavy is the volume of fire?
Why two or more floors, it could be heavy fire on a single floor
How long has the fire been burning prior to arrival?
The type of construction, Will determine how quickly heavy fire will cause failure
NFPA 1500 requires dispatch centers to notify command every 10 minutes until
The fire is knocked down
The incident become static
The IC cancels the notifications
The ultimate test of command is the most dangerous time on the fire ground. This is usually.
The transition phase from an offensive tech to a defensive strategy. A managed retreat is best.
The following structures and lightweight roofs are particularly dangerous
Lightweight trusses, C channels, or other engineered construction methods
When sending firefighters to the roof for roof operations, the officer should ask 4 important questions
A roof operation is necessary
What do I hope to gain by ventilating?
How long has the fire been impinging on the roof?
What is the safest method of operating on the roof?
The textbook states that in roof operations, you shouldn’t use phrases like
Always assign firefighters to roofs and never conduct roof operations
The density of old lumber versus new lumber has changed from
32.5 pounds for cubic foot compared to 36.9 pounds per cubic foot
Basement fires are difficult and dangerous problems, especially when completely underground. Various tactics include.
Advancing a hose line down the interior stairway. Dangerous and creates event opening.
Softening the target through a basement window from the exterior
Pulsing and indirect tactics
Walk out basement doors if available should be the first choice
When assessing a basement fire, you should first do this, then pay attention to these factor
First conducted complete 360 for potential exterior attack
Factors in increasing risk due to limited entry and Gress, working above the fire, we can floor structures, unknown, fire load, ventilation issues, utility panels, hanging wires, utility meters, and appliances
This tactic should be used as much as possible before entry to a basement fire
Softening the Target prior to making entry.
Venting without a hoseline in place will have a negative effect on structural stability
Standard on scene measures used by firefighters to test floors for structural stability are not always reliable because
Sound on the floor, thermal imaging, and floor sag are very late indicators and not entirely reliable.
