What is the maximum allowed bottom and top car runby for a screw column elevator?

In the context of screw column elevators, the maximum allowed bottom and top car runby is critical for ensuring safe and efficient operation. The specified maximum runby distance is established to prevent the elevator car from running beyond its intended travel distance, which could lead to potential safety hazards.

The correct value of 600 mm (24 inches) aligns with industry standards for screw column elevators. This measurement ensures that there is a sufficient buffer at the top and bottom of the travel path, allowing for adequate mechanical function and adjustment during operation. These standards are in place to support the stability of the elevator and minimize the risk of accidents or operational issues.

Understanding the implications of maintaining this maximum runby also highlights the importance of adherence to safety regulations, which prioritize the protection of users and the longevity of the elevator system. It is essential to ensure that installation and maintenance practices comply with these standards to foster a safe working environment.