Can you explain the operation of a lifting platform with reference to a building hoist?

A building hoist, also known as a construction hoist, is a temporary lifting platform used in construction to lift materials and personnel vertically within a building under construction. It operates by using a motor-driven pulley system that runs on guide rails or tracks. The hoist is attached to the building structure and as the building grows, the hoist is extended upwards. The platform is loaded with materials or workers, and the operator controls the ascent or descent through an electrical switch or remote control. Safety features include limit switches to prevent over-travel, safety catches to stop the platform in case of a cable failure, and interlocks to ensure the platform cannot be operated when the doors are open.