Flashcards in Ch. 2 Size-Up Deck (32):
2 forms of Life Hazard
Them and us
4 ways CADS data transmitted to field (about occupancies)
Dispatcher reads it as part of alert message
Flash the message on video display
Teletype it to each unit
Have message repeated over radio 1 minute after initial alarm
* 3 & 4 best possible choices *
Time has many impacts. Name 3.
Time of day
Time of year - effect of holiday season
Elapsed time since fire has begun - elapsed burn time=key indicator of likelihood of structural collapse
What produces life hazard (mathematical style formula)
Time of day + occupancy + location/extent of fire = life hazard
Estimating time after flashover (for start of 20 min. rule for class 3 and 5 ordinary construction) using view venting through window
1. Not vented from a single window
2. Not vented or only vented from 1 or 2 windows
3. Venting from Windows on 2 FLOORS
1. Under a minute or two
2. Anywhere from 1 to 5 minutes
3. Greater than 10 minutes OR
Use of an accelerant
The most important decision you will make as IC?
Order out interior crews
Construction has 5 implications/concerns
Second, building itself contributes to fire load
Third, number of hidden voids - responsible for destruction more than any other
Fourth, ability of building to resist collapse - most important to firefighters
Finally, water added and point of overload for materials
NFPA 220 uses type of construction with _____________ and _________ to describe the required fire resistance rating for select structural elements.
Roman numeral designation, Arabic numeral subsets (RA)
5 classes of construction (H.O.T.)
Class 1 - Fire resistive (fireproof)
Class 2 - Noncombustible
Class 3 - Ordinary Construction
Class 4 - Heavy Timber
Class 5 - Wood frame
Buildings OVER ____ stories or ______ feet must be built of Class 1 construction.
6 stories, 75 feet
Frontage of a building is important because: (3)
Attack begins in the front.
Provides opportunities for horizontal ventilation.
Frontage indicates Width and Depth of the structure (not always the case).
The ______ the fire is in a building, the _______ the hazard.
lower, more serious
Fires below grade are especially problematic because: (2)
Lack of opportunities for horizontal ventilation. Entire operation, from entry through attack and even relief, must be performed in this atmosphere, limiting members work time.
Size-up 13-point outline
COAL WAS WEALTH.
Area + height
Three locations that create "special" firefighting problems:
Top floor of most ordinary brick and wood.
Any place where fire is above the reach of ladders for exterior vent and access.
Determining the extent of fire: Items to evaluate quickly are:
Location of smoke and flame.
Color and movement of smoke.
If all floors above are pushing heavy smoke with no visible fire, expect it to be in the _______.
What is the 20-minute rule or air bottle rule?
For class 3 and 5, aggressive attack until first due units deplete their bottles
Reports from IC when a change in the incident is good for:
Allow superior officers to monitor conditions in their office.
Units responding to multiple alarms are alerted to potential problems
These building components are noncombustible in both class 1 and 2 (class 2 less fire resistance than class 1)
Large volumes of black smoke at roof
Light smoke at roof
Defective oil burner
Light to moderate black smoke in basements
Oil burner malfunction
*signal to bring Class B extinguisher*
Gray to light brown smoke
Common Class A materials
Six sides of fire area
May be possible to move the exposure hazard
Truck and railcars are both possible candidates
Most residential rooms have a fire load of _______. Libraries have a loading of ___________.
5 lbs of fuel per sq ft.
25-30 lbs of combustible per sq ft
Tests determined flows of ______ for each ______ of fire area are sufficient to control fire for light loads of ordinary combustibles.
100 sq ft
In today's plastic based society, application rates increase by 50%, so residential flows of ________ per 100 sq ft, commercial flows of ______ and industrial and heavily loaded storage area of _______ per 100 sq ft.
Officer opts for "fast knockdown", which means _____________.
Using a preconnected deck gun or other fast-acting master stream.
Difference in Class 3 vs 4 (p. 22)
Class 3 - consists of masonry or other noncombustible walls with 2 hr fire-resistance rating
Class 4 - EXTERIOR WALLS of these buildings are of masonry or some other noncombustible material with AT LEAST a 2 hr fire resistance rating