Ch. 18 Bldgs Under Constr., Renovation And Demolition

Question 1

Most sources of ignition at sites:

Answer 1

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

Question 2

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

Answer 2

30 minutes after work completed

Question 3

Stream of choice for buildings under construction:

Answer 3

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

Question 4

2 concerns involving hoists

Answer 4

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!

Question 5

3 conditions involving standpipes:

Answer 5

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

Question 6

Most serious collapse threat in bldgs under construction:

Answer 6

Poured-in-place reinforced concrete

Question 7

Fire protection components

Answer 7

Sprinkler, standpipe and fire doors

Question 8

Before opening up streams, the first activity should be:

Answer 8

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

Question 9

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

Answer 9

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

Question 10

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.

Answer 10

Remove the lower ladder at night to prevent entry

To the second floor

Question 11

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.

Answer 11

Rarely a civilian life hazard

A great number of hazards to firefighters

Question 12

Concerning asbestos, this area is an extremely combustible space:

Answer 12

Intermediate chamber, where people undergo decon

Question 13

Fire protections systems

_________ will be among the last items completed during construction

Answer 13

Sprinkler systems

Question 14

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

Answer 14

Within 2 floors

Question 15

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

Answer 15

Nonautomatic dry

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

Question 16

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

Answer 16

Floor outlet valves

Cellar

Question 17

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

Answer 17

Test the first floor outlet for water

Question 18

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

Answer 18

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

Question 19

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

Answer 19

Approximately 1,500F

Question 20

Post-tensioned concrete

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

Answer 20

Jacking phase, several weeks

Question 21

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

Answer 21

150 lbs per cu. ft.

48 hrs

Question 22

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 ______.

Answer 22

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

Question 23

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

Answer 23

3-5 times

Firefighter traps

Question 24

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

Answer 24

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.

Question 25

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

Answer 25

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