Ch. 12 Special Structures and Design Features Flashcards
1
Q
Two developments that made high rise possible …
A
… and practical at the end of the 19th century were the use of steel frame construction and elevators. The innovations made the following limitations obsolete:
- Height limitations of masonry and wood construction
- Unpredictability and brittleness of cast iron
- Difficulty of access to high level floors without mechanical assistance
2
Q
New York Empire State Building
A
Constructed in 1930 w/102 stories
3
Q
All model building codes require …
A
… smoke proof exit enclosures in all stairs serving floors 75ft or higher
4
Q
Typical Features of a Fire Command Center
A
- Emergency voice alarm system control panels
- Fire Department two way telephone system panel
- Fire detection and fire alarm system annunciator panel
- Elevator location and status panel
- Sprinkler valve and waterflow annunciator
- Emergency and standby power status indicators and controls
- Central/status panel for smoke management systems
- Controls for unlocking stairway doors
- Fire pump status indicators
- Telephone for fire department use with access to the public telephone system
5
Q
Containment and Venting
A
Maximum pressure reached during an explosion may exceed ten times the atmospheric pressure
6
Q
Explosion vent panels …
A
… should not weigh more than 3 pounds per square foot
7
Q
Types of Explosion Vents
A
- Louvered openings
- Hangar type doors
- Wall panels
- Windows
- Roof vents
