Ch 4 - Building Systems

Question 1

Smoke proof stair enclosure

Answer 1

At least one required of buildings of 5 stories or more
Active or passive smoke control

Question 2

Active smokeproof enclosures

Answer 2

Utilize positive pressure to keep smoke out of stairwell

Question 3

Hydraulic elevator

Answer 3

Max six stories
No breaks, raising and lowering controlled by hydraulic pressure and the ram

Question 4

Drum elevators

Answer 4

Electric elevator
Obsolete, only very old structures
Cable wound around a drum with counterweights in the shaft

Question 5

Traction elevators

Answer 5

Most common
No height limitations
Machine room typically right above hoistway
Counterweights
Cables do not wind around drive sheave, pass over it

Question 6

Fire rating of elevator hoistways

Answer 6

1-2 hours typically

Question 7

Various vertical shafts and chases

Answer 7

Garbage and laundry chutes
Grease ducts
Pipe chases (water, drain lines, sprinkler piping)

Question 8

HVAC system components

Answer 8

Outside air intake
Fans
Air filtration
Heating/cooling equipment
Air ducts

Question 9

HVAC smoke control systems

Answer 9

Strategic use of passive and active systems to direct or stop movement of smoke
Automatic or manual
Use of fans and dampers

Question 10

Smoke and heat vents

Answer 10

Rooftop vents required in large area buildings and buildings with few windows
May be used in conjunction with draft curtains to expel smoke

Question 11

Smoke/heat vent minimum opening

Answer 11

4ft

Question 12

Draft curtain/curtain board size and spacing

Answer 12

Minimum depth 20% ceiling height
No more than 8 times the ceiling height apart

Question 13

Pressurized stairwells

Answer 13

Single or multiple injection sites (single or multiple blowers)

Question 14

Compensated pressurized stairwell system

Answer 14

Airflow into stairwell can be adjusted to account for stairwell egress doors being opened
Can vent excess pressure