ABSTRACT
Thrust, arena, and open stages sit within the audience chamber and are not separated by a proscenium wall. They are primarily, but not exclusively, used for drama. This chapter discusses design considerations unique to these types of stages. It also discusses the design of recital hall and concert hall platforms, which also sit within the audience chamber. Then it examines the approaches to adapting proscenium theaters to serve as concert halls. A thrust stage is often backed by a proscenium stage, even though the majority of the performance takes place on the thrust where the full audience can see. An open stage is a different sort of thrust. It doesn't extend as far into the auditorium and is more likely to be wider than it is deep. The arena stage is easily identified as a distinct form because it is completed surrounded by audience.
