Smoke Control Using Positive Pressure Fans Flashcards
Natural Tendency of Air Movement…?
Higher Pressure are to a lower pressure Area
High Rise Units in Manhattan carry how many PPF’s each?
2
Some Ladder companies are also assigned 2 fans each (second piece)
Ventilation Support group will report to Command Post with following equipment?
27 inch tempest PFF exhaust hoses eye and ear protection Dave Clark headset and HT's Co monitors elevator keys Halligan and heavy axe door chocks/lights/SCBA and PPE
What is the first consideration for pressurization?
ATTACK STAIRWELL
-Pressurization of the attack stairway is MOST EFFECTIVE if done SIMULTANEOUSLY with the fire attack
Stairwell pressurization MUST be initiated by…?
INCIDENT COMMANDER
Who shall inform IC of recommended placement of PPF’s?
Vent GROUP SUPERVISOR: based on :
- number of PPFs and Personnel available
- location of fire floor
- number of floors in building
- stage of firefighting operations
When can PPF;s in operation be left unattended??
NEVER
HT EQUIPPED MEMBER
Priority order of use for PPF’s?
- Pressurizing attack stairwell for fire attack
- pressurizing evacuation stairwell
- ventilating public hallways
Optimum placement of PPF?
4 to 6 feet from the attack stairway door on ground floor and directly facing the door to the stairwell at an angle tilt of 80 DEGREES
Fan shall be positioned to blow____the stairwell: it should not be_________?
INTO
PLACED IN THE STAIRWELL
PPF’S CREAT noise which can interfere with ICP…in this case..?
look for another location other than lobby entrance to attack stairwell
In PROJECT TYPE MD’s, the ICP is usually not located in the LObby, thus..?
PFF noise SHOULD NOT hamper communications
Pressure delivered to attack stair by PFF will be great enough for up to___stairwell doors to be open and pressurization to remain effective?
3
however all members should understand that keeping as many doors closed as possible is the goal
members moving from one area to another should remember to CLOSE THE DOOR BEHIND THEM
Line is stretched through stairwell door…?
door closed as much AS POSSIBLE
Ventilation support Group Supervisor should?
instruct his members to survey attack stairway below fire floor to verify doors are closed
request IC instruct 3rd and 4th Ladder Companies operating above fire floor to verify doors are closed