The process of reinstalling the recently reviewed, polished and measured sheave wheels of the Johnstown Inclined Plane has ...

The website Lift Blog said the chair had deroped, which means the cable carrying the chairs — also called a haul rope — disengages from the wheels atop the towers.

The website Lift Blog said the chair had deroped, which means the cable carrying the chairs — also called a haul rope — disengages from the wheels atop the towers.

Subshafts are tunnels dug from the underground up toward the surface. The structure is made up of the headframe (the windowed structure and associated supports) and the sheave wheel. It measures 8" x ...