Chapter 11 Flashcards
Back up lines
What are the engine companies first line of defense?
Back up lines
’’ it is an additional hose line used to reinforce the work of and to protect personnel when the initial attack proves inadequate or when a problem occurs with the initial hand line
Back up line
Back up lines should be ‘’’ size diameter of the initial attack on
Same size or larger p. 377
One or two rooms and content fires can usually be extinguished with
The initial Handline using less than 500 gallons
Two and half inch hose lines, approximately weighs ‘’ per 50 foot section
106 pounds
It could take a crew of ‘’ to overcome the friction to advance a 2 1/2 half inch hose line effectively
4 to 5 ( at least three)
2 1/2 inch hand line for the back up is the best choice for what type of structure fires
Commercial
The back up line should stand ready. The back up firefighter should not fight the fire along with the initial attack team. If another hose line is needed for a fire attack. A second line should be laid. The exception is fighting a ‘’’’’ fires where non-protected open web steel bar Joyce are used for roof trust and floor joist assemblies.
type 2 noncombustible building fires we are non-protected open web steel are use for roof trust and floor assemblies
What steel means that the Steelers not covered a coded with fire resistance material
Non-protected
at Temperatures between ‘’’’’ steel expand, warp, twists and loses its tensile and compression strength it can collapse under its own weight within’’’ being subjected to this
1000°-1000(1100) degrees , 5 to 10 minutes
In fighting’’’ (Building construction) fires should the backup lines be used to cool open web steel bar trust at the ceiling and the steel columns that support them while they attack team focuses on the seat of the fire
Type two noncombustible fires p. 378
The back up line serves as what until a dedicated RIT line is laid
Initial RIT line
Residential structure, fire a minimum of ‘’ lines should be pulled . what are they and in what order should they be pulled ?
4
1. Attack line
2. Back up line 2-3 depends
3. Exposure line
4. RIT line p. 379
Let’s say that you have a one story, wood frame house with fire blowing out the windows on the B side and flames are Impinging on the D side of the exposure house next-door in this scenario how would you lay your lines?
- Attack line
- Exposure line
- Back up line
- RIT
Two-story woodframe house on fire with fire showing from the kitchen on floor one at the CD corner of the house and extending to floor two there are interior exposure bedrooms on floor two in flames are starting to show the bedroom above the fire how you lay your lines:
- Attack line.(1st floor)
- Exposure(2nd floor)
- Back up line.(1st)
- RIT
In most scenarios, the back up hose line should be the second line laid but if Immediate exposure problems threaten the lives of trapped occupants or flames and inPinge on an exposure. The exposure line should be ??
the second and the back up line.. P. 380
If the initial 1 3/4 inch attack line are not gaining control of a fire within’’/’’ sec it is probable that the streams are not reaching into the seat of the fire or that the hose line is not delivering enough water to Coole the area
30 to 60 seconds
In general back up, lines should be at least ‘’’ than the initial attack line
One size larger
2 1/2 inch hose line delivers almost as much water with far greater reaching THAN
2, 1 3/4 IN handlines
You’d get deeper penetration into a fire and a lot more cooling if solid stream with a x2’’’ smooth tip is used
1 1/8, 1 1/4 p. 381
If the 2 1/2 inch initial attack line are using combination nozzles. The back up line should be equipped with.
Smooth board tips
2 1/2 inch combination nozzles deliver up to how many GPM
300, tip pressure of 100 pounds per square inch
What are used for defensive strategies at fires?
Master streams
When an interior attack using 2 1/2 half inch hose lines fails to control the fire than ?
Back out all firefighters and attack using master stream appliances p. 385
Master stream appliances should be charged and operated by ‘’ again for speed and efficiency
Fresh crews p. 386
Which hose line will be used when the attack is being made
in a commercial building where there is still savable
property?
p. 384
Master stream
Which is a better gauge for determining the size hose line
that should be pulled for the backup hose line during fire
operations
Fire flow requirement
