-
In a 20 story building with 3m floor to floor height, a passenger lift is hoisted by a steel rope. Weight of the lift car is 750 kg and ultimate load the steel rope can carry is 39,000 kg. Assuming a factor of safety of 20 for the steel rope and an average passenger weight of 75 kg, the passenger capacity of the lift is ____________
-
- 12 to 12
- 14 to 14
- 16 to 16
- 18 to 18
Correct Option: C
16 to 16
Usable strength of steel rope = 39000/20 = 1950kg
Strength of steel rope considering lift-car weight = 1950 – 750 = 1200kg
Capacity of the lift = 1200/75 = 16 persons.
