SAFETY DEVICES
The VStättVO requires a fire barrier between the stage and auditorium for large stages. This is only opened during performances and rehearsals. Iron safety curtains (EV), fire and pressure-resistant steel door constructions that close the proscenium opening smoke-tight, are typically used for this purpose
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The door leaf is moved with electric drives during regular operation. In the event of a fire, an EV must close safely within a certain time even after the regular drive power fails. The door leaf’s own weight is used for this purpose. A lowering brake ensures a braked free fall and a gentle touchdown on the platform floor.
To extend the structural integrity of the EV in the event of a fire, it can be cooled on the platform side using a deluge system. The structure is equipped with a water control system for this purpose.
Alternatively, solutions using foldable or roll-up textile protective curtains with a corresponding fire resistance class are also possible.
SAFETY DEVICES
In order to enable the smoke extraction of the stage area required in the event of a fire, openings can be provided in the stage roof or in the upper area of the stage house side walls, which open automatically in the event of a fire.
A common design for pitched roofs are smoke vents arranged in the roof area so that they can be moved towards the eaves. For flat or slightly pitched roof surfaces, smoke hoods can be used in which partial areas of the roof are completely raised. Smoke flaps hinged on one side can be used in the roof area or on the platform side walls.
To ensure opening in the event of a fire even after the regular drive power fails, either the dead weight of the structure is used (e.g. smoke dampers on pitched roofs) or counterweights are provided to overcompensate for the dead weight of smoke hoods, for example. Alternatively, the electrical drive energy required for damper solutions can be provided for a certain period of time via UPS systems.
