As with automobiles, the lower the weight of an elevator car, the less energy is needed. ... One of the ways that elevators achieve a safety factor between 7 and 12 is to use 4 to 8 separate cables each of ... if a mechanical room is required for hydraulic elevators, if a penthouse machine room is required for traction elevators, anbsp;...
|Title||:||Plumbing, Electricity, Acoustics|
|Author||:||Norbert M. Lechner|
|Publisher||:||John Wiley & Sons - 2011-11-01|