Ch 17 pg 433-435
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Questions and Answers

Pg 433 says that steel bar joist are spaced 2 to _ ft apart, but ch 12 pg 343 says they may be spaced up to __ ft apart. Both say up to __ ft long

6 6 60

A 2 1/2 in handline or a ____ stream should begin the attack on the fire store. The 2 1/2 in line offers __ to 80ft of reach

Master 75

Pg 435 says a 2 1/2 in handline has a reach of more than __ ft

80

If the flow of the handline isn’t enough use a ___ gun. After you get the store knocked down, continue to cool the steel joist for ____ minutes before anyone enters beneath them

<p>Deck gun several</p> Signup and view all the answers

If heavy fire is found in the cockloft of the store immediately next to the fire store, do not enter ; drop back at least ___ stores and check cockloft again

<p>Two</p> Signup and view all the answers

On steel bar joist you can not cut directly over the fire however you can back away __ ft or the width of ____ average stores from the sagging joist to an area where the hose streams are cooling the steel and cut there

<p>60 three</p> Signup and view all the answers

A typical older store is 20 ft wide and -100ft deep with a ceiling height of 10- ft pg 434

<p>75 15</p> Signup and view all the answers

Pg 431 says that an older store is __ to 100ft deep

<p>50</p> Signup and view all the answers

Both of these factors—- _____ areas and ____ fire loads require engine companies to use different tactics from what they do for house fires

<p>Larger heavier</p> Signup and view all the answers

Even a moderate size store fire in an older taxpayer is _____ sq ft, __ times the size of the average living room with a fire load per square foot that is __ that of residential occupancies

<p>1500 5 3</p> Signup and view all the answers

Each engine should connect to a serviceable hydrant with either their ___ suction or via ____ diameter (5 or 6in) supply line.

<p>Soft large</p> Signup and view all the answers

One of the most beneficial places to spot the pumper is with the ___ gun directly in line with the fire store

<p>Deck</p> Signup and view all the answers

One benefit of a 2 1/2 in handline is the ____ of water delivered and the ___ of the stream

<p>Volume reach</p> Signup and view all the answers

Under typical store circumstances a 2 1/2 in line can be maneuvered with ___ members

<p>3</p> Signup and view all the answers

The 1 __ in solid tip flowing ___ gpm at only 50 psi nozzle pressure does a good job of blasting a hole through the ceiling to get water on the fire

<p>1/4 325</p> Signup and view all the answers

A commercial fire should be approached with about __ gpm per square foot

<p>.35</p> Signup and view all the answers

Flashcards

Steel Bar Joist Spacing

Steel bar joists are typically spaced 2 to 6 feet apart in older stores.

Steel Bar Joist Length

The maximum length of a steel bar joist is 60 feet.

Initial Fire Attack in a Store

A 2 1/2 inch handline or master stream should be used to start firefighting in a store.

Handline Reach

A 2 1/2 inch handline can reach up to 75 to 80 feet.

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Deck Gun Use

If a handline is insufficient to extinguish the fire, a deck gun should be used.

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Cooling Steel Joists

After knocking down the fire in a store, cool the steel joists for several minutes before entering.

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Cockloft Fire Safety

If heavy fire is in the cockloft, retreat at least two stores away and check again.

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Sagging Joist Safety

When dealing with sagging steel bar joists, move 60 feet away or the width of three stores to a safe area.

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Old Store Dimensions

Older stores typically have a width of 20 feet and a depth of 75 to 100 feet, with a ceiling height between 10 and 15 feet.

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Store Fire Tactics

Store fires require different tactics than house fires due to their larger areas and heavier fireloads.

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Store Fire Load

A moderate-sized store fire can be up to 1500 square feet, five times the size of a living room, with a fire load three times higher than residential occupancies.

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Hydrant Connection

Each engine should connect to a hydrant with a soft suction hose or a large diameter ( 5 or 6 inch) supply line.

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Pumper Placement

The best location for the pumper is with the deck gun directly facing the fire in a store.

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Handline Benefits

A 2 1/2 inch handline offers a good balance of water volume and reach.

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Handline Maneuverability

Under typical store conditions, a 2 1/2 inch handline can be maneuvered by three firefighters.

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Ceiling Breach

A 1/4 inch solid tip flowing 325 gpm can be used to create an opening in the ceiling to reach the fire above.

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Water Flow Rate

Commercial fires should be fought with an estimated .35 gallons per square foot of water flow.

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