BOOK 100 Ventilation Flashcards
Pressurization fans in stairwells, that function when the sprinkler or smoke detector systems are activated, are required to provide a uniform air velocity within each enclosed stairshaft. The fans must provide not less than ___ cubic feet per minute while maintaining a positive pressure of not over ___ lbs. on interior doors.
50 cubic ft per minute
25 lbs
What is the pressure generated by a fire (up to ___ times atmospheric pressure)
3 x atmospheric pressure
Types of windows based on era constructed.
Pre 60:
60-74:
Post 74:
Pre 60: Openable windows
60-74: Tempered glass on at least two sides of the building. (At corners, and at 50-foot intervals or less.)
Post 74: Tempered glass on four sides of the building. (At corners, and at 50-foot intervals or less.)
- Tempered glass windows are identified by 3-inch luminous or reflective decals in a lower corner which indicate they are “For Fire Department Use.”
Air flow within building stairshafts is virtually static in buildings up to ___ stories.
25
Buildings over ___ stories will naturally flow minimal amounts of air in an upward direction.
25
By simply opening the doors at the bottom and roof levels of a stair shaft, natural air currents can be created up to ___ - ___ mph to assist in ventilation.
3-6 mph
When pressurizing stairwells with FD blowers, Regardless of the size, portable blowers should be placed ___ feet to ___ feet back from the doorway and angled back at least ___ degrees.
4 - 6 ft back
5 degrees
When pressurizing stairwells using FD blowers, utilize a ___ shape pattern at the doorway rather than placing them in series.
V shaped pattern
If windows must opened/broken for ventilation purposes, utilize the windows on the _______ side of the building, if possible.
Leeward side
Ventilation operations utilizing blowers are effective up to ___ floors in a high-rise building.
25 floors
