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Building Systems > PDX_31_Specialties / Conveying Systems > Flashcards

PDX_31_Specialties / Conveying Systems Flashcards

0
Q

ANSI/ASME code A17.1

A

Safety code for elevators, dumbwaiters, escalators, and moving walks

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1
Q

American industrialist who invented the safety device that prevents elevators from following is the hoisting cable fails

A

Elias Otis

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2
Q

NFPA

A

Fire safety and electoral standards for life safety

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3
Q

National elevator industry Inc. (NEII)

A

Standard layouts and suggested minimums for accessibility

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4
Q

1.6 x building height + 350 =

A

Elevator speed

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5
Q

Stairs may be as narrow as__but when loads are over 50 people, they must be__wide:

A

36 inches minimum,

44 inches minimum, 50ppl +

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6
Q

Max stair rise, min stair run:

A

7” max rise, 11” min run

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7
Q

Nosings have a maximum rounded edge of

A

Half-inch

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8
Q

Hey drill diameter between__and at least__away from wall:

A

Diameter 1-1/4” – 2”

Min 1-1/2” clr from wall

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9
Q

Ramp slope, Max rise, Max run, landing dimensions

A

Minimum 1:12

Max rise of 30”

Max run 30’

60” landing

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10
Q

Minimum ladder width

A

18 inches wide minimum

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11
Q

– Used for lowrise or less than five story buildings, about 50’0”.
– Speed varies between 25 – hundred and 50 ft./m
– Carrie about 10 tons
– Freight
– Cylinder extends as far into the ground as it is tall (So they don’t require penthouse Machine room or heavily braced roof over shaft.

A

Hydraulic elevator

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12
Q

Uses a telescoping plunger set into the shaft next to the cab. Lift is provided by applying force to the upper member of the car frame.

A

Holeless hydraulic

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13
Q

– Commercial/industrial greater than five stories/50’0”
– Up to 1800 ft./m
– Up to five times

A

Electric (traction ) elevator

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14
Q

Counterweights in electric elevator weigh:

A

The weight of an empty car + 40% of live load capacity

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15
Q

Electric elevators use gears when

A

High-speed installation

New motor and break on one shaft which drives a second main shaft

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16
Q

Electric elevator double wrap:

A

Cables Passover the sheaves twice, get worn out faster, used for high-speed elevators where more traction is required

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17
Q

When the rope is wrapped around achieve on the counterweight and connected to the top of the shaft the rope moves twice as fast as the car, but requires less wait to be lifted.

A

1:2 roping

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18
Q

Freight elevator speeds range from:

A

50 ft./m to 200 ft./m

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19
Q

Mounted on shaft and operated by the control mechanism. Self applying so the car will stop in the event of a power failure.

A

Main break

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20
Q

Measures and limits the elevator speed by means of the control panel. It will actually the safety rail clamp if the elevator tries to exceed its proper rate of travel.

A

governor

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21
Q

Grip the sides of the rails if there is an emergency

A

Safety rail clamps

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22
Q

Located on the bottom to stop the car if it over travels at low speed… Won’t do much to stop a car traveling at a higher speed

A

Car buffers/bumpers

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23
Q

Prevent the elevator from operating in less the horse toy door is closed and locked

A

Interlocks

24
Q

Doors have spring-loaded lip that retracts open if it encounters a person/object when attempting to close

A

Safety edged

25
Q

Similar to save the edges, but senses the presence of a person near the door and can stop the closing motion.

A

Proximity dictators

26
Q

Common door arrangement which allows faster passenger loading in unloading

A

Single speed center opening

27
Q

Two door leaves, one which telescopes past the other as they move

A

Two speed side opening

28
Q

Four door leaves, to telescope pass the others as they move

A

Two speed center opening

29
Q

Elevator door width

A

Minimum opening with is 3’6”, but 4’0” is better because it allows two people to leave or enter at the same time.

30
Q

Best located directly above the hoistway to provide adequate space for motor, sheave, break, controller board, speed governor, floor selector mechanism, and motor genitor.

A

Machine room

31
Q

Machine room should have these dimensions:

A

As wide as the hoistway and 12’ – 16’ deeper.

Min ceiling height 7’6” – 10’0”+

32
Q

Best system for new, high-quality installations of any speed elevator:

A

Variable voltage, variable frequency AC

Motor control system

33
Q

Platform can be 9 ft.² maximum and carry 500 pounds

A

Dumbwaiter

34
Q

Used to move large numbers of people quickly, efficiently, safely, and I don’t low-cost of operation:

A

Escalators

4000–8000 people per hour

35
Q

Typical inclination of escalator:

Typical width of escalator and escalator treads:

A

30°

32” or 48” wide
w/ tread widths 24” or 40”

36
Q

Not considered a legal exit or ADA route

A

Escalator

37
Q

Escalator industry standard speed

A

100 ft./m industry standard,

120 ft./m for transportation and sports facilities

38
Q

Up and down escalators “side-by-side or separated by distance quote, seen often and metro stations and multilevel motion picture theaters

A

Parallel configuration

39
Q

Minimize the structural space required by “stacking” escalators that go in one direction, frequently used in department stores or shopping centers:

A

Crisscross configuration

40
Q

Moving sidewalks can have a short incline up to __, and have typical operation speeds of __.

A

Short incline up to 15°.

Speed of 140–180 ft./m

41
Q

Should never be more than___cars in one elevator bank or___cars in one line.

A

Eight cars in one bank, or four cars in one line.

42
Q

Maximum number of cars serving the same portion of the building in a single hoistway, per the IBC

A

3 cars in same hoistway

43
Q

Typical elevator strategy in very tall building:

A

– Divide the total number of required elevators into banks that serve different zones. (Shafts take up a lot of space especially on lower floors)
– Sky lobby concept: high-speed elevators from lobby to sky lobby, transfer two elevators serving specific upper floors.
– Stacked or double deck elevators: doubles shaft capacity, reducing area required for elevator and decreases local stops

44
Q

Maximum number of passengers that can be handled in a given. Typically based on a five-minute peak

A

Handling capacity

45
Q

Measured and weighed the number of people a car can carry

A

Capacity

46
Q

Average time between departure of cars from lobby

A

Interval

47
Q

Average time required for an elevator car to make a round trip

A

Road trip time

48
Q

Average time spent by passenger from the moment they arrive in the lobby to leaving the car on the upper level

A

Travel time

49
Q

Average waiting time for an elevator, varies with building type

A

Interval

50
Q

Blue six pointed star with the rod of Asclepius in the center, used to represent emergency medical services

A

Star of life

51
Q

Total # ppl in 5 min period

/ handling capacity of one car

A

of elevators required

52
Q

Small buildings, single call button each floor, single button for each floor inside car. Pastor has the exclusive use of the car until the trip is complete:

A

Single automatic

53
Q

Most common type of system for light to moderate service. Elevator remembers and answers call in opposite direction. One trip is complete, the cab returns to lobby.

A

Selective collective operation

54
Q

Large buildings, system controls all elevators with programmable microprocessor to respond to calls in the most efficient way.

A

Group automatic operation

55
Q

Elevator emergency operation:

A

Power failure: one car can operate at a time, other stop, allowing unloading. Fire: return to lobby without stopping, switch to manual mode by FD

56
Q

If building is over for stories and has at least one elevator, which must be able to hold a 24” x 84” open stretcher

A

Star of life

57
Q

Minimum ada dimensions of the center opening car

A

80” x 54”with 42” door min

60” x 60” with 36” door min

58
Q

Minimum ADA dimensions for elevator car with side door:

A

68” x 54”

54” x 80”

Both 36 inch door min

Building Systems (37 decks)

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