A theater stage floor which moves vertically on an elevator, usually so that one set can quickly replace another; may consist of a single unit or articulated sections.

What is a 2 stage elevator?

TWIN JACK HOLELESS CAR TYPE SUMMARY Single stage jacks are used for low travel, typically on 2 stop cars up to 14 ft. Two stage jacks are used for travel up to 28 to 30 feet (typically 3 to 4 stops).

What is an elevator overrun?

An elevator overrun system comprising: a first body arranged to be fixedly mounted to a portion of an elevator system or elevator shaft; a second body positioned within the first body and moveable from a deployed state to a retracted state relative to the first body; and a limit switch located at a distal end of the …