When plumbing the hoistway for a bank of elevators, which of the following statements is correct?

When plumbing the hoistway for a bank of elevators, utilizing the corridor line to locate the two outside rails as reference points for the rest of the rails in the bank is the correct approach. This method ensures that the outer rails are set accurately, which is critical as these rails support the car's movement and weight. By establishing the positions of the outer rails based on the corridor line, it allows for a cohesive alignment of all subsequent rails as they need to work together to ensure smooth operation and safety of the elevator system.

This method helps in maintaining overall consistency and accuracy in rail alignment, which is vital for balance and performance. When the outer rails are properly aligned, the other rails can then be positioned in accordance with them, thereby preventing misalignments that could lead to operational issues. Properly plumbing the hoistway ensures that the elevator operates efficiently and reduces wear on mechanical components, increasing longevity and reliability.