Ch. 16 Store Fires - Taxpayers and Strip Malls Flashcards Preview

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Flashcards in Ch. 16 Store Fires - Taxpayers and Strip Malls Deck (64)
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______ are usually located over larger single-tenant occupancies, which may appear to be part of a row of adjoining stores.

Bowstring truss roofs


Steel-bar joists are spaced __________ apart, in contrast to wooden bowstring trusses, which are ________ apart.

2-6 ft
20 ft


Key factor that allows us to operate within a strip mall with bar-joist roof is:

Steel can be protected against failure by applying a hose stream


Begin attack on fire store with:

2 1/2 in. line
75-80 ft of reach


What size attack lines into exposed stores on either side and begin sweeping cockloft?

1 3/4 in.


2 general classes of taxpayers

New style
Old style


Where do we vent on a bar-joist roof?

Can not cut directly over fire; back away 60 ft or width of 3 average stores from the SAGGING JOISTS to area where hose streams are cooling steel


Heavy fire in metal roof vs wood

Metal = coordinated attack, cooling steel
Wood truss = evacuate (inside and roof)


Size of area when 2 or 3 bar joists fail

10 or 15 ft wide, up to 60 ft long

(as opposed to gap 40 ft by 100 or more by single bowstring truss)


Commercial buildings differ from residential in several ways that affect crews of FIRST-ALARM engine and ladder companies:

Larger, undivided areas
Fire loading per sq. ft. is heavier
So different tactics!!!


Typical store in taxpayer is: (size)

20 ft wide
75-100 ft deep
10-15 ft ceiling height


(Commercial) One of most beneficial places to spot the pumper is:
This permits:

IN LINE WITH and ACROSS THE STREET from fire store
Use of preconnected master stream or deck gun


To accomplish task of preventing extension and collapse, the key is:



Cousin of lightweight truss roof?

Plywood I-beam


Wood-truss roofs behave different than metal roofs. Difference is:

Size and speed of collapse
*steel sags and wood trusses snap*


One of highest priorities for engine company operations in residential occupancies:

Speed (placing hoseline)


Priority for commercial buildings - Each engine should:

connect to serviceable hydrant

{little need for speed}


Advantage of using one or two lengths of large-diameter hose by first arriving engine versus direct hydrant connection:

allows flexibility in positioning the apparatus


3 advantages of 2 1/2 over smaller lines

Volume and reach.
Personnel efficiency.
Power of stream


Forcible entry difficulties at taxpayer fires are usually greatest:

At the rear.
-at least 1 ladder company should be assigned to rear of all SERIOUS taxpayer fires


Doors almost always open:
Types of locks:

Often fox locks and drop-in bars (bolt heads penetrating door).
-may be faster/less damaging breach hole in cement-block wall


Fastest means of gaining entry but most of the time is NOT the best way?

Smashing glass in the door


5 signs of impending backdraft

Heavy smoke.
Highly heated Windows.
No visible fire.
Smoke under pressure w/occasional puffs.
Smoke being drawn back into bldg.


Method of forcible entry maintains integrity of window and door glass?

Through-the-lock method


Complete burnout in cellar often because:

-heavy fire loading
-maze-like storage
-absence of quick ventilation
-lack of sprinkler system


Only chance of success for cellar fires:

fast, high volume attack with immediate cutting of vent holes in 1st floor - SOLID TIP, NO FOG.


How much hose when entering a cellar?

Twice the depth of the store PLUS one length.
-always charged before going down cellar stairway


If possible to advance hose deep into cellar: (2)

2nd 2 1/2 in. line at BASE of stairs.
Member with radio at TOP of stairs


Order of attack for cellars (7)

Hand lines to basement with vent.
Not darkened down in 10 minutes, plan new strategy.
Handlines withdrawn, distributor/cellar pipe placed.
After 1-2 minutes, try to advance lines again.
High-ex as many access points as possible.
Master streams flood first floor.
Adjacent cellars to stop extension


Terrazzo, concrete or "mud" tile floors poured on top of wooden floor joists for variety of reasons: (3)

Low maintenance floor surface.
To provide sound or temperature deadening.
Simplify leveling of sagging/uneven floor.