Final answer:
Without exact dimensions, the space inside the movable steps cannot be precisely calculated. Theaters design technical spaces like wing space and fly lofts with functionality in mind. The steps could include compartments or drawers for prop storage, taking the stage design considerations into account.
Step-by-step explanation:
To determine how much space is inside the steps for storage of props in a theater, we need to consider the volume of the steps. Since the question doesn't provide exact dimensions for the steps, we can't calculate a specific volume. However, theaters are often designed with multiple technical spaces in mind to support the functionality of the theater.
For example, wing space on both sides of the stage is used for moving actors and scenery, which is ideally half the width of the stage. Similarly, a fly loft located above the stage allows for scenery and lights to be lifted out of sight, and it should be twice as tall as the proscenium arch.
Spaces like the Green Room, dressing rooms, laundry rooms, and shops are often backstage or on lower levels. In some cases, an orchestra pit may also be present. All these spaces need to be taken into consideration when designing and building practical structures such as movable steps that can also serve as storage.
To create these movable steps with internal storage, a theater would need to design them with compartments or drawers that can be accessed easily, while ensuring that the steps are sturdy enough to be safely used by the performers.