Highrise/Midrise Flashcards
(40 cards)
After 1976 most high-rise building in Northern Virginia were built using
fire- resistive construction,
Modern high-rise buildings involve two basic designs
residential and commercial
_______ and ________ typically comprise buildings constructed prior to the 1976
Steel and concrete
high-rise building constructed after the 1976 code change will be of
fire-resistive construction
High rise buildings have a ____ standpipe system
Class 3
How many approved exits must be on each floor/
2
Multiple layers or thick gypsum and masonry walls typically enclose high-rise stairway, elevator, and other shafts. These will typically have a _____ ________
2-hr fire-resistance rating
High-rise buildings typically do not have an attic. However, as previously discussed, the top floor or penthouse often contains _________ and _________.
mechanical and elevator rooms
FYI
government facilities or mercantile establishments) are constructed with reinforced drywall, as shown in Figure 9. This material looks identical to regular drywall, but the drywall encases either a layer of wire mesh or a solid sheet of Lexan polycarbonate
In lightweight concrete failure occurs at 80%, of designed after __ min of fire exposure
studies have shown that thermal cracks appear within __-___ minutes of fire exposure
14-16 minutes
In high rises the presence of an outward opening door indicates an
electric or telephone room or another type of closet.
The security gate installed in the stairway at the lowest level, what does this denote?
last floor with an exterior entrance.
Pressure-reducing valves will limit pressure to a maximum of
175 psi
Electric traction typically controls elevators in high-rise structures. Control rooms reside at the ____ ___ ___ ____ ____
Top of the elevator shaft
If more than two floors above the fire still contain occupants, _______ and _______ branch should be established
search and evacuation
FYI
___________smoke rises upward from the fire floor until it reaches the roof or ceiling level. The smoke then banks off the roof or ceiling and migrates downward, back toward the fire floor.
Mushrooming
FYI
Smoke will rise until the temperatures balance, at which point the smoke begins to settle, or stratify
Stack Effect
fire to double in size every ____ seconds.
90 seconds
effectively suppress a chute fire with an object lodged along the chute, personnel should
drop a heavy object from a level higher than the lodged object
Buildings under construction must have a riser
two floors below the top-most finished floor.
Exterior attack of upper floor fires will require deployment of
aerial master streams.
Personnel can sometimes more efficiently bypass heavily secured doors by
breaching adjacent drywall- composed walls
high-rise fires must consist of five basic actions
determine fire floor,
2. verify fire floor,
3. control occupants,
4. control building systems, and
5. confine and extinguish the fire.
FYI
Personnel must still supply the standpipe system, even if the initial attack was made with handlines stretched directly from the apparatus.
Deploy hoseline directly from the engine to the vehicle fire. Command must be notified, and the FDC still supplied
