What condition requires permanent ladders for appliance access on roofs?

Permanent ladders are required for appliance access on roofs when the height exceeds 14 feet. This requirement ensures that maintenance and service personnel can safely access appliances located on elevated roof areas. The rationale behind this regulation is primarily centered on safety, as accessing appliances at significant heights poses a risk of falls or accidents without proper equipment. The use of permanent ladders provides a stable, safe, and dedicated means of access, reducing the likelihood of injuries associated with using makeshift ladders or climbing methods.

The 14-foot threshold is a key regulatory point established to balance safety and practicality, ensuring that anyone working on equipment at elevated heights has a reliable and structured means of access.