17-04 High Rise Ventilation

Question 1

What SOG is this SOG an extension of?

Answer 1

SOF 17-01 Ventilation

Question 2

What is an Evacuation Stairwell?

Answer 2

used for evac ops for civilians

Question 3

What is Operations Stairwell?

Answer 3

utilized for FF ops, unsuitable for civilians

Question 4

What is Set-up?

Answer 4

2 fans placed in series (one in front of another 1.5- 2m between)

Question 5

What is Stack Effect (chimney effect)?

Answer 5

movement of air into/ out of buildings, etc resulting from air buoyancy

Question 6

Where can stack effect occur? (4)

Answer 6

1. buildings
2. chimneys
3. flue gas stacks
4. other ocntainers

Question 7

Why does air buoyancy occur in STack Effect?

Answer 7

occurs due to difference in indoor-to-outdoor air density

Question 8

How does air buoyancy occur?

Answer 8

results from temperature and moisture differences between indoor and outdoor air density

Question 9

What are factors causing greater buoyancy force, hence stack effect? (2)

Answer 9

1. greater thermal difference

2. height of structure

Question 10

What does stack effect help drive? (3)

Answer 10

1. natural ventilation
2. air infiltration
3. fires

Question 11

What is VSO?

Answer 11

Ventilation Sector Officer

Question 12

What does VSO do?

Answer 12

plans/ coordinates ventilation of structure

Question 13

What arriving apparatus is expected to begin set-up for ventilating a high-rise (unless otherwise assigned)?

Answer 13

3rd arriving apparatus

Question 14

Where does all 3rd arriving apparatus personnel set-up?

Answer 14

at exterior exit to Operations Stairwell

Question 15

What is expectation of 3rd arriving apparatus in regards Entry Control at Hi Rises?

Answer 15

It is not expected that 3rd arriving apparatus should be ECP

Question 16

Who designates operations Stairwell if not already designated by IC?

Answer 16

VSO

Question 17

What is to be done if exterior set-up at Ops Stairwell not feasible?

Answer 17

IC informed

Question 18

How many FF stay at Ops Stairwell exit and what is expected of them? (2)

Answer 18

1. 2 FF

2. begin ascent to upper floors

Question 19

Where do remaining personnel go after Ops Stairwell established?

Answer 19

to set- up Evac Stairwell and mimic Ops Stairwell set-up

Question 20

What are duties of Ops/ Evac stairwell sectors? (6)

Answer 20

1. determine effectiveness of ventilation/ pressurization efforts
2. assist/ redirect evacuating occupants
3. assist/ rescue found occupants/ fire personnel
4. observe heat/ smoke conditons on all floors
5. locate exhaust points (roof hatches/ man doors)
6. remove immediate smoke from upper stairwells

Question 21

What is objective of pressurized stairwells?

Answer 21

to prevent further spread of heat/ smoke/ gases into occupied areas.

Question 22

When is it NOT recommended to further ventilate using pressurized air throughout structure?

Answer 22

if active firefighting is ongoing

Question 23

What area should be used as exhaust, if possible?

Answer 23

area of origin.

Question 24

When is at appropriate to begin ventilating? (2)

Answer 24

1. fire contained to unit of origin

2. fire deemed under control

Question 25

What are options for ventilating? (4)

Answer 25

1. area of origin- through window/ door
2. across/ nearby area of origin
3. roof access
4. smoke shafts

Question 26

How is ventilating through area of origin/ nearby area of origin accomplished?

Answer 26

use windows/ doors in area of origin/ nearby area of origin using pressurized stairwells and hallway to move smoke out through area of origin/ area nearby area of origin

Question 27

What should always be considered when determining best option for ventilating?

Answer 27

natural wind