AUC 349 Smoke Control Using PPF Flashcards
When using the PPF s at a high rise fire what should be given first consideration for pressurization
The attack stairwell is the first consideration as ordered by IC
What tools Ventiation support group report to ICP WITH?
Two 27 inch PPF with exhaust hoses Eye and ear protection Dave Clark headset HT CO monitor Elevator keys Halligen and Heavy axe Door chocks Hand lights SCBA and full PPE
Proper placement of PPFS IS based on what factors
- Number of PPFS
- Personnel available
3 location of fire
4 number floors in building
5 stage of FF ops
What should be done if negative results are encountered when using PPFS
- Discontinue pressurization by throttling down fans to idle
- Close doors to the stairwell that fan is pressuring
- Notify IC when fans are deactivated and doors secured
What is the priority use for PPFS
- Pressurization of attack stair to support fire attack by controlling smoke condition at attack stair doorway and throughout the attack stairway
- pressurizing the evacuation stairwell for smoke and CO control
- Ventilating the public hallways for smoke and CO CONTROL
What is the optimum placement of the PPF
- 4-6 from attack stairway door on the ground floor directly facing the door to the stairwell angle tilt of 80 degrees
True or false you should place the fan in the stairwell thAt you are trying to pressurize?
False. Fan should placed to blow fresh air into the stairwell
The pressurization of attack stair will allow up to how many doors to be open and still be effective.?
Up to 3 doors and will still remain effective
Members cannot move from one area to another in stairwell…true or false
False: members may move from one area to another as long as remember to close the stairway doors behind them
Who is responsible for maintaining a proper stairwell seal
All members on the fire ground
Who verifies that stairway doors are closed above The fire floor?
The vent support superviser will request that the IC instruct 3&4 due ladder companies verify
Who surveys the floors below fire floor of attack stairway to verify doors are in closed
Position
Vent support supervisor instructs vent group members to survey floors below fire floor
Depending on conditions one fan can pressurize up how many stories ?
10 stories
Two fans will pressurize
40 story building when properlypostioned
If a additional fan is needed a second fan should be placed where ?
3 floors below the fire floor
If your trying to clear the stairway of smoke and CO how long should you open the bulkhead door the smoke clears
Approximately 60 seconds
What are the benefits of pressuring and clearing contaminated stairwells of smoke andCO
- Faciltate the rapid and efficient evacuation and searches of the stairwells
- Limit the contamination of other parts of structure
- Reduce calls form panicked resident s due to smoke
- It provides fresh air to operating units
If high levels of CO are encountered while using PPFS who should be notified
The IC
If using fans for sequential vent where do you place the fan?
On the exterior of building
Fans will be placed on the exterior of building when used to sequential vent in this situation the exhaust fans do not need to be used because fans are on exterior of building . True or false
False exhaust hoses shall still be used
Firefighters may still operate in attack stairway when sequential venting that stairway
No FFs or civilians .. Must be removed before vent begins
If venting the attack stair by sing sequential vent the bulkhead of attack stair should remain closed and bulkhead to evacuation stair should remain open .
No the bulkhead of the attack stair remains open and the bulkhead over the evacuation stair remains closed
Co contamination occurs on multiple floors start where to relieve co
Start at the lowest point of contamination and work towards the top of building
When trying to mechanical vent a structure where should look for an exhaust opening ?
As a close to and as high as possible to the seat of the fire
When should you try and vent a la rge area mechanically ?
After the seat of fire is determined and fire is controlled by a sprinkler or handline
When using PPFS to pressurize a large area for the purposes of mechanical vent how far back should you set the fan form I nlet opening ?
Further than 4-6 feet back used to pressurize stairs …..fan at 80 degress
How large should the exhaust opening be when using PPFS to mechanical vent a large area?
Double the size of the inlet area where fan is placed
When using roll down gates as the inlet area for the fans how do you create the seal
By adjusting the height of the roll down door
