Specification H1.3 Construction of proscenium walls
This Specification contains the requirements for the construction of proscenium walls for theatres, public halls, or the like.
This Guide does not address, in detail, every provision in this Specification. However, there are some comments which should be made.
A stage and backstage area of a theatre or public hall has a high fire load. It is also a potential fire source due to stored props and scenery, etc.
Specification H1.3 deals with how to provide fire separation by a proscenium wall between the stage and backstage areas, and other parts of the building, including those occupied by an audience.
The height and extent of a proscenium wall are similar to those of a fire wall. Any openings in it must be suitably protected to prevent the spread of a fire to the audience side.
An important part of avoiding the spread of fire from the stage is the protection of the opening to the stage. Protection must be provided while still permitting the audience to view a performance.
Since the opening is too large to protect with an automatically-closing fire door, the aim of providing protection while maintaining functionality is achieved by the use of a proscenium curtain. Clause 6 of the specification gives two alternative options for such a curtain.
2. Separation of stage areas, etc
Dressing rooms, scene docks, property rooms, workshops, associated store rooms and other ancillary areas must be—
located on the stage side of the proscenium wall; and
3. Proscenium wall construction
4. Combustible materials not to cross proscenium wall
Timber purlins or other combustible material must not pass through or cross any proscenium wall.
5. Protection of openings in proscenium wall
Every opening in a proscenium wall must be protected—
at the principal opening, by a curtain in accordance with Clause 6 which is—
capable of closing the proscenium opening within 35 seconds either by gravity slide or motor assisted mechanisms; and
operated by a system of automatic heat activated devices, manually operated devices or push button emergency devices; and
able to be operated from either the stage side or the audience side of the curtain; and
at any doorway in the wall, by a self-closing –/60/30 fire door.