BC Chapter 12 Flashcards
Typically, model building codes require ____ or ____ hour fire resistance for the frame of a high-rise.
And ______ hour for the floor.
p. 313
2 or 3 for the frame
2 for the floor
A breaker used as a safety device in an elevator hoistway or elevator room is protected by automatic sprinklers.
This device cuts power the the elevator before water discharges on the elevator equipment.
p. 319
Shunt Trip
Only consider using and elevator if the fire is above the ______ floor.
p. 320
5th floor
Code require Phase I operation of all passenger elevators with vertical travel greater than 25 feet.
This phase is called the ______ phase.
p. 320
Recall phase/operation
Phase I operation can be triggered by:
(3)
p. 320
- Smoke detectors
- Sprinkler waterflow alarms
- Manual keyed switch in the terminal floor lobby
During Phase I operation, the elevator car’s emergency stop and floor selection buttons are rendered inoperative; so the car cannot stop anywhere but the terminal floor.
p. 321
True
All new elevators must have Phase II operations where as only elevators serving more than 25’ must have Phase I/recall.
p. 321
True
What is the greatest single challenge in controlling fires in underground buildings?
p.323
Venting heat and smoke
Smokeproof enclosures/stairwells are required for buildings with levels more than _____ feet below the level of exit discharge.
p. 324
30 feet
Limitations of air-supported or air-inflated structures include:
(4)
p. 326
- Limited to one story
- Vulnerable to high winds
- Membrane may be limited combustible
- If so, must be low flame spread and low smoke propagation.
- Cannot be used where fire-rate construction is required.
Building codes require that mall walkways be a minimum of ______ feet wide.
p. 329
20 feet
Building codes may require smoke control systems in covered malls with ______ or more stories.
p. 330
3 or more stories
While some shopping malls may be built of fire-resistive construction, many are noncombustible or wood construction.
In recent years, developers of covered malls have preferred unprotected noncombustible Type II-a construction.
p. 330
True
Some codes waive the requirement for sprinklers in atriums if their ceiling is more than _____ feet above the floor.
p. 333
55 Feet
Fire codes require that atriums be enclosed with ____hour fire-rated construction.
p. 333
1-hour
