Chapter 5 - Stairwells Flashcards
It’s better to use the stairwell than the elevators if the fire is below what floor?
8th
Stairwell should always be used if the fire is below
Ground
What are the two ways stairwell doors can be locked?
Mechanically or electronically.
What are the two types of electric door locks?
Electric strike
Maglock
Keys almost never override which type of lock?
Mag locks.
How are mag locks unlocked?
Only unlocked by interrupting their power supply.
What may be the only option for getting past a locked mag lock door
Opening the wall next to the door.
Every building has at least how many stairwells usually in the core?
Two.
What must be done to the attack starewell before fire attack is initiated?
It must be cleared of evacuees.
How should you initiate the clearing of evacuees from the attack stairwell?
The public address system.
City codes normally require buildings to provide reentry floors once at least how many floors?
Every five floors.
What is the most common stairwell?
U-Return.
What is the best way to name individual stairs in a set of scissor stairs?
Give each stair one name from bottom to top.
What shows firefighters that they have a fire just inside the door to the tenant area?
If firefighters find the damper open when they enter the vestibule.
Because the exhaust fan is bigger than the supply fan, it creates what type of pressure in the vestibule
Negative.
Where must the plug-in phones be acquired from for radio communication in high rises?
The fire control room.
What could be considered the lifeline of emergency operations
Stairwells
Demolition is often the only way what type of door can be opened
Outside stairwell door
Rather than ripping the outside stairwell door off firefighter should access the stairwell from what floor
Second floor
Where are the magnets located on maglock doors
Usually at the top of the door
What type of stair should the side of the core that the door opens to be indicated
Scissor stairwells
Rather than ripping the door off of a steroid door you cannot enter firefighters should access the stairwell where
From the second floor. (66)
What is on the inside of a door if it’s mag locked
Red button or an alarm pull station
How do you close a stairwell door without locking it
Door straps.
Which stairwell doors must be permanently unlocked or unlock upon alarm
Stairwell doors on reentry floors
What type of smoke towers there’s no method of intervention for smoke being pulled into the exhaust shaft
Open balcony
When the damper is activated by a heat detector where is it located
Heat detectors are in the vestible and in the tenant area
In what type of stairs should the side of the core that the door opens to be indicated
Scissor stairwells
