Chapter 2 Size-Up Flashcards
Evaluation of problems and conditions that affect the outcome of a fire
Size up
What is the 13 point acronym for COAL WAS WEALTH
Construction
Occupancy
Apparatus and personnel
Life Hazard
Water supply
Auxiliary appliances
Street conditions
Weather Exposures Area Location and extent of fire Time Height
How can the life hazard of an occupancy be reduced?
Imposing occupancy load restrictions
Improving exit facilities
Specifying fire doors and partitions
installing complete wet pipe automatic sprinkler systems
What is the best method to reduce life hazard of an occupancy
Install an automatic wet pipe sprinkler system
What percent of civilian fire deaths occur in residential buildings?
80%
What is the key indicator for the likelihood of structural collapse
Elapse burn time
What is a critical component for evaluating the 20 minute rule
Knowing the class of construction
The 20 minute rule applies to only 2 classifications what are they
Wood frame class 5 and Ordinary class 3
When does the timer start on the 20 minute rule
When the fire reaches flashover and begins to attack the structural members
Fire venting out of windows on two floors typically indicates on of 3 things what are they
prolonged burning greater than 10 minutes
use of an accelerant
presence of large holes connecting the floors
Unprotected steel can be expected to fail in as little as____ minutes in serious fire
5 min
This system uses the dispatcher to keep track of the elapsed time and prompts the IC over the radio
Time mark system
What construction related factor is responsible for more buildings destroyed by fire than any other
Void spaces
What are the four concerns firefighters should have about building construction
Degree of compartmentation
Degree of which the building itself contributes to the fire load
Number of hidden voids
Ability of a building to resist collapse in a fire
Which class of construction is the least stable in terms of collapse when exposed to fire?
Class 2 noncombustible
pg25
What is the wall fire resistance rating of class 3 ordinary
2 hour
What is the minimum thickness of floor and roof planks in class 4 heavy timber
3 inches minimum
What is the minimum size for interior columns, beams, and girders in class 4
8x8
These materials produce gray to light brown smoke when sufficient oxygen is present
Class A ordinary combustibles wood/paper
Class A ordinary combustible burning in reduced oxygen produce large amounts of ___________ smoke
Dark gray or yellow gray
Which exposures must be defended first?
The one with highest life or property value
How many pounds of fire load per square foot does most residential rooms have?
5
How many BTUs does a gallon of water absorb?
9275
How many BTUs does a pound of ordinary combustibles give off?
7000-10000
