Vertical Transportation

Question 1

Hydraulic elevators and types

Answer 1

Slow, limited in travel distance to 40’, not efficient, high risk of oil spillage below ground. 4 types: Direct plunger, holeless, roped hydro, telescoping holeless.

Question 2

Traction elevators and types

Answer 2

Faster, smoother ride, long-distance, more efficient, last longer. 2 types: Geared and gearless.
Geared is slower, and has a bumpy ride but can lift heavier loads, max rise of 150’.
Gearless is faster, has a smoother ride. and can have a max rise of 2000’. Gearless can have a machine room or not.

Question 3

Hoistway ventilation requirements

Answer 3

3.5% of hoistway area or 3 SF (whichever is bigger)

Question 4

Accessible means of egress

Answer 4

Buildings over 4 stories. Building must be on emergency power.

Question 5

Escalators

Answer 5

Max slope is 30-35 degrees
Max speed is 100-125 feet per minute
Min vertical clearance = 7’
Max capacity is 1.25 max people per tread
Max rise is 20-40 ft or 60 ft if supported at mid span

Question 6

Components of a holed hydraulic elevator

Answer 6

Car support rails
Elevator pit
Piston and underground cylinder

Question 7

Components of a traction elevator

Answer 7

Hoisting cables
Counterweights
Penthouse machine room