Which of the following indicates that a building requires separate hoistways for elevators?

The requirement for separate hoistways for elevators generally pertains to the number of elevator cars in a building. When a building has four or more elevator cars, the logistics and operational needs become more complex, necessitating the use of separate hoistways to ensure efficient and safe operation.

Having multiple cars in a single hoistway can lead to issues such as increased wear and tear, safety concerns regarding car coordination, and limitations in service during maintenance or emergencies. Therefore, regulations often mandate that buildings with a larger number of elevator cars provide separate hoistways to accommodate these needs effectively. This separation helps in minimizing potential hazards and ensures that each elevator can operate independently, which enhances safety and efficiency in building operations.

In contrast, having fewer elevator cars, such as one, two, or three, typically does not trigger the same requirements for separate hoistways, as the operational complexities and safety concerns are generally manageable within a single hoistway system.