3.2.2.3 Commercial Structure Fire Flashcards
What are the tactical priorities, in order, for a commercial structure fire?
Fire attack water supply search supplement suppression system evacuation ventilation 2nd attack line RIT
If there is any indication of fire, what should be done?
Call for a 2nd alarm.
What are the general expectations for a 1st due apparatus on a commercial structure?
on scene report, establish command, determine operational mode consider additional alarms locate main body of the fire supply FDC if in vicinity initiate fire attack if feasible
What are the general expectations of a 2nd due apparatus on a commercial structure?
Stage on C side if possible until report of fire location
initiate fire attack from closest entry point
search immediate area
call for needed resources
continuous water supply if hydrant nearby
What are the general expectations of a 3rd due apparatus on a commercial structure?
continuous water supply
supply FDC
2nd attack line
What are the general expectations of a 1st due rescue on a commercial structure?
evacuate adjacent units
focused area search
What are the general expectations of a 4th due apparatus on a commercial structure?
anticipate need for elevated master stream
position truck for assessment of roof conditions
prepare for roof ops
What are the general expectations of a 5th due apparatus on a commercial structure?
RIT
-360 within reason
-deploy ladders as secondary egress
fill unmet tactical priorities
What are the general expectations of a 2nd due rescue on a commercial structure?
report to command
fill unmet tactical priorities
What are the general expectations of a battalion chief on a commercial structure?
Assume IC position
Utilize IMS
What are the general expectations of a 2nd due battalion chief or staff chief on a commercial structure?
Report to command post
Safety Officer
Bring PPE to command post for possible deployment to division/group/brnach
Coordinate decon and rehab
A “big box” is a large non compartmented building that is routinely _______sqft or larger.
40,000 sqft
Initial decisions about the operation must anticipate what?
Where the fire is going and how quickly it might get there.
What is the primary concern?
life safety
What are two of the most important indicators of fire behavior?
smoke conditions and the pattern of smoke and air movement
If multiple calls are received what should be done automatically?
A 2nd alarm should be dispatched.
Smoke rising from an active fire vs cold smoke from a fire largely controlled by sprinkler system should be an indicator of what?
Whether entry is feasible or appropriate.
Heavy smoke or heavy fire conditions indicating involvement of any truss roof system should indicate what?
That an exterior attack is appropriate.
First due apparatus should attempt to view how many sides of the structure?
3
Ongoing size up may require the use of a _____ to view the ______.
Aerial device
Roof
Entry into IDLH environments with ______ and ________ present extreme risks and exterior operations should be considered.
poor visibility
no reliable indicator of fire location
Crews should use caution to maintain position between the fire and _________.
Their escape route.
What is immediate jusitification for the abandonment of interior operations?
fire involvement of structural roof members
What is one of the most effective methods of limiting crew exposure to interior operations while simultaneously addressing occupant life safety?
supplemental support of the suppression system.
Utilization of what should only be considered for small incipient fire suppression or later overhaul operations?
standpipe system
What is the most prominent limiting factor affecting utilization of standpipe systems for large scale suppression operations?
Inconsistent or unknown locations.
Dependence on standpipe systems presents further risk to crews entering the structure without what?
protection of a charged hoseline
What other negative factors are potentially present with standpipe systems?
limited flow capacity
non standard attachment sizes
What is the highest incident priority during a big box fire response?
life safety
What creates the best possible chance of rescue in a big fire with citizens reported to be missing or trapped?
Identify as closely as possible where they are.
What should be considered the best method of protecting trapped citizens?
substantial direct fire attack with coordinate ventilation
What should be assumed about any exterior fire?
That it has penetrated the interior.
What should be established prior to interior operations?
Appropriate sized RIT
Where should RIT be established on a commercial structure fire?
Each entry point
What can be used by crews attempting a focused rescue?
Tag line off a hoseline
Be wary of what conditions at big box incidents?
light smoke showing
Interior hose stretches should be limited to how far beyond the entry point?
150ft
If moderate to heavy smoke is showing at the ceiling and hose line crews have not reached the seat of the fire, what should be done?
Consider evacuating the structure and initiating a defensive operation.
If heat and smoke conditions are worsening, consider doing what?
Evacuating and going defensive
What should the primary responsibility of first arriving crews be?
life safety
exposure protection
What is the minimum hose size that should be used for interior FF’ing in a big box fire?
2.5”
What utilities should typically be secured in a big box operation?
Gas
HVAC
What should be established quickly if crews are operating inside the building and conditions worsen?
vertical ventilation
What are Big Box Watch Out situations?
fire in roof truss Interior recon without full PPE and hose line Interior crews with worsening heat/smoke Interior ops off of hose line Zero visibility deeper than 150' FF working past 1/2 air supply Fire/heavy heat/smoke above crews Crews on roof over fire tilt slab construction horizontal ventilation with interior crews and unchecked fire
