Ch. 18 Bldgs Under Constr., Renovation And Demolition Flashcards

1
Q

Most sources of ignition at sites:

A

Only present when construction crews are on the scene working
-fires spotted are small

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2
Q

Fire watch should remain in areas looking for signs of hidden fire for:

A

30 minutes after work completed

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3
Q

Stream of choice for buildings under construction:

A

Elevating platform
2 in. tip
>1100 gpm, 100 ft deep

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4
Q

2 concerns involving hoists

A

First, hoist shut down on nights and weekends
Second (most important) 2 types of hoist = 1) people 2) materials/equipment.
People hoist will have control position
look for labels!

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5
Q

3 conditions involving standpipes:

A

Floor outlet valves open
Top of riser open
Riser sectional valve closed (usually OS and Y, often found in mechanical equipment room)

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6
Q

Most serious collapse threat in bldgs under construction:

A

Poured-in-place reinforced concrete

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7
Q

Fire protection components

A

Sprinkler, standpipe and fire doors

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8
Q

Before opening up streams, the first activity should be:

A

To clear all personnel from areas in the streets below on the sides OPPOSITE the nozzle

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9
Q

Vertical openings in a building under construction create problems (2)

A

Protected by rope or lightweight wood-FF crawling might fall into shaft
Openings vertically aligned so burning debris will rain down

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10
Q

When buildings is occupied, there may be three or more staircases. It’s is common practice to _____________. If a fire department ladder is put up _____________, the remaining ladders are in place.

A

Remove the lower ladder at night to prevent entry

To the second floor

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11
Q

Buildings under construction or demolition should be conducted with extreme caution. There is _________________ in these situations. On the other hand, there are ______________ at a serious fire.

A

Rarely a civilian life hazard

A great number of hazards to firefighters

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12
Q

Concerning asbestos, this area is an extremely combustible space:

A

Intermediate chamber, where people undergo decon

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13
Q

Fire protections systems

_________ will be among the last items completed during construction

A

Sprinkler systems

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14
Q

At an absolute minimum, the standpipe riser and outlets should progress to ____________ of the highest level under construction.

A

Within 2 floors

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15
Q

Most standpipe systems in buildings under construction will be _______________, at least temporarily. All that may be provided is an FDC: just _____________.

A

Nonautomatic dry

Two black pipes with swivels sticking out through a fence or a tarpaulin.

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16
Q

It isn’t unusual to find _________ left in the open position, especially the ones in the _______.

A

Floor outlet valves

Cellar

17
Q

First arriving units at a fire in a building under construction should make it a habit to ___________________ before proceeding upward.

A

Test the first floor outlet for water

18
Q

Two other conditions found involving standpipe systems of buildings where work is in progress: (besides floor outlet valves open)

A

Top of the riser is left open without a shutoff of any kind.
Riser sectional valve may be installed to divide the system into two or more zones.
these valves are ALL of an indicating type, usually OS and Y

19
Q

If spray-on fibrous coating is missing from steel I-beams and columns, the steel will lose its strength at:

A

Approximately 1,500F

20
Q

Post-tensioned concrete

During _____________, which can take ___________, if the cables fail, could cause a catastrophic collapse.

A

Jacking phase, several weeks

21
Q

Weight for unhardened concrete and time for concrete to harden enough to support its own weight.

A

150 lbs per cu. ft.

48 hrs

22
Q

The floor below the most recently poured concrete is ________________. The _______ posts are spaced every _____ in each direction. After the first 48, the formwork is stripped off. The floors will still be braced with ____ spaced every ______.

A

Veritable lumberyard of plywood and 4x4 posts
4x4, 4 ft.
4x4, 8 ft.

23
Q

The firefighter death rate at vacant building fires is more than ________ that of fires in occupied residential buildings. All in all, these are __________.

A

3-5 times

Firefighter traps

24
Q

Empty box:
Box with one line drawn diagonally:
Box with X in it:

A

Empty-normal structural stability, interior operations.
One line-some serious hazards, ops from outside if possible, if small fire, interior ops only after careful examination.
X-severe hazards, ALL FFing from exterior, crews to enter must get permission from IC, few people as possible.

25
Q

The only way to prevent the actual occurrence of such a catastrophe is through a combination of _______, ________ and _________.

A

proper Engineering.
Enforcement of applicable codes.
Educating the owners and occupants.
(E3)