A sliding stage is a floor mechanism that can move part of the stage floor forward and backward or from right to left. Sliding stages are used for changing scenery. Most stages do not use sliding stages alone, but in combination with stage elevators and revolving stages. Sliding stages require space (called the "substage") on the left, right and/or rear of the stage, in order to move. Compensators (sunken elevators) are also necessary, so that the sliding stage keeps flush with the stationary stage floor level.
Stage Wagons
Stage wagons are stages moved like wagons, which travel in a straight line across the stage surface. "Backstage wagons" move between upstage and downstage, and "sidestage wagons" move between stage right and left. Some stage wagons are used in conjunction with center-stage elevators, so they can be raised and lowered. Stage wagons can also have a revolving stage (turntable) built into them. Depending on the structure of the assembly, stage wagons require substage and understage space