When does ASME A17.1 require a pit ladder to be installed?

The requirement for installing a pit ladder when the pit depth exceeds 35 inches comes from the guidelines established by the ASME A17.1 code, which governs safety standards for elevators and escalators. This code aims to ensure safe access to machine pits and other areas where maintenance or emergency service may be required.

Installing a pit ladder at depths greater than 35 inches is crucial because it provides a safe means of egress, reducing the risk of falls or injuries while personnel navigate deep pits. The specification of 35 inches is based on safety assessments that indicate at this depth, a ladder becomes necessary for both safety and compliance with industry standards.

Other depth measurements may not necessarily warrant a ladder installation under ASME A17.1, as they fall below the threshold where vertical access is required for safety.