Vertical Circulation & Conveyance Systems Flashcards
Who invented the Elevator?
Elisha Otis
Carries Freight or Passengers up and down in elevator Shaft
Car (Cab)
Vertical Space for travel of one or more elevators
Hoistway (Shaft)
Veretical steel tracks on side walls of shaft that control travel of car
Guide Rails
Connected to the top beam of the elevator; lift cab in the shaft
Cables
Rectangular cast iron blocks mounted in a steel frame to counterbalance the elevator cab
Counterweights
Driving motor on heavy structural frame turns sheave to lift and lower car, along with other equipment
Elevator Machine
Houses elevator machine on roof
Penthouse
Drive (motion) control: velocity, acceleration, position determination, leveling of car
Operating control: car door operation and functioning of car signals including floor call buttons and indicating device
Supervisory control: group operation of multiple-car installations. Indicating and control devices: car and hallway buttons, lanterns, etc.
Control Equipment
Extends from the level of the lowest landing to the floor of the shaft
Elevator Pit
What does LU/LA stand for?
Limited Use/ Limited Access
Welded steel frame supports escalator on both ends, and in middle if rise is over 18’ (5.5 m). Provides space for mechanical equipment.
Truss
Steel angles attached to truss guide step rollers and control step motion
Tracks
Sprocket assemblies, chains, and machine work like bicycle chain drive
Drive system
Located at both ends of escalator. Stops the drive machine and applies brake
Emergency Stop Button
ADA requires elongated newels with minimum of two horizontal treads before landing plate to allow people to adjust before leaving escalator.
Elonganted Newels
Synchronized with tread motion for passenger stability and support
Handrails
Designed for maximum passenger safety stepping on and off. Side panels of the escalator made of fiberglass, wood, or plastic.
Balustrade Assembly
______ ____ is a determining factor in a buildings shape, core layout, and lobby design. This comprises of 10-15 percent of the construction budget
Vertical Transportation
ASME stands for?
American Society of Mechanical Engineers
allow ____ elevator for every 250-300 people
One
How much floor clearance is required for elevator cars
36” x 48” minimum
Signals must be centered at a minimum of?
72”
hoistway entrancces must have signage with raised characters and braille centered at?
60”
Call buttons must be centered at?
42”
The 2 most common types of elevators are?
1) Electric (traction) elevaotrs
2) hydraulic elevators
How many service cars are provided for every 10 passenger cars?
One
An ____ ____ comprises of a glass-enclosed car attached to a traction lifting mechanism behind the car
Observation Car
An _____ is a power driven stairway consisting of steps attached to a continous circular belt
Escalator
