CHAPTER 8 Flashcards
1st alarm units arrive at the scene of a fire in a supermarket that has a bowstring timber truss that is CONCEALED BY A CEILING. On arrival the 1st ladder officer determines that there is a serious fire in the truss attic area above the ceiling. In this situation it would be correct to believe that
A defensive outside attack and protecting exposures is the only correct strategy
In a structure with a bowstring truss roof, ventilation openings may be made in the sloping FRONT OR REAR portions of the roof to provide
1) Cross ventilation of the entire roof space if the webs are not enclosed
2) Quick access to the enclosed attic area for a SMALL fire, like an overheated motor
3) An exterior hose line operation thru the ventilation opening
4) An exterior view into the roof area to see if the fire has spread to that area
Fire in a warehouse with a bowstring truss roof NOT CONCEALED BY A CEILING, large pile of rubbish burning with flames starting to extend upward. 1st line operations are as follows
2 1/2 to attack main body of fire
If this line does not control the flames within the FIRST FEW SECONDS interior firefighting shall be discontinued
A truss roof concealed by a ceiling is
Much more dangerous than a truss roof without a ceiling
When truss members are ENCLOSED, if a serious fire threatens collapse of the roof, the timber trusses will
Fail one truss section at a time
In a building without a ceiling, where fire at floor level or in a single timber truss is successfully controlled and the fire appears it will not spread, a second
Large diameter hose line should be stretched to sweep the underside of the roof area
Regarding the collapse concerns at church fires, the portion of the place of worship that is the most unstable is the
Tower or steeple
A steeple on top of a tower is _____stable than a dome at the top of the tower
Less stable
At church fires where there is a peak roof and there is also a steeple or tower, the wall that presents the least danger is the
Exposure 3 wall
At attic fires in churches the ceiling
May collapse before the roof collapses
A church fires if 2 hose lines can not extinguish the fire via an interior attack,
Withdraw firefighters and fight the fire from the outside
What is the primary venting at a church fire
The Rose window at the front of the church. When venting the rose window from the bucket vent the entire window
At church fires the 1st tower ladder should be positioned in
A corner safe area, supplied with water and raised to the Rose window. Subsequent master streams should be positioned around the structure to protect the exposures
The 1st hose line
May be taken thru the front or side door
1st two hose lines should be 2 1/2 lines
A defensive attack inside the church
Should not be conducted
