Wire Guided Curtain
Proscenium 42’ W x 22’ H Max
Roller Guided Curtain
Proscenium 50’ W x 30’ H Max
Framed Curtain
Proscenium over 50’ W 30’ H
The Straight Lift Curtain is rigged to hang flat, so it requires that the fire curtain fly space above the proscenium, be higher than the proscenium itself. The curtain is rigged to always hang flat and uses a counterweight set to balance the curtain. The line set is kept out of balance on purpose so that when released, gravity will bring the curtain in.
An emergency release will close the curtain fully in less than 45 seconds. The last eight feet of curtain travel will require a minimum of five seconds, as a safety measure. Straight lift curtains can be either motorized or manually operated.
See detailed drawing of Straight Lift Curtain.
|
|
 The Brail Lift Curtain requires as little as one half the height of the proscenium above the proscenium. The rigging is similar to an Austrian drape, which gathers in pleats for storage. When released, the curtain lowers by gravity to cover the proscenium opening.
Like the Straight Lift, the Brail Curtain will fully close in less than 45 seconds. In this type of system the top of the curtain is dead-hung from the support structure.
The most common method of lifting and releasing the curtain is a brail winch. A brail winch has an integral holding brake, which is connected to the fire curtain release line. When the system is activated, the brake releases the winch and the Curtain falls. The descent of the curtain is controlled with an adjustable speed governor located inside the winch. Both manual and powered winches are available, depending on the curtain size.
See detailed drawing of Brail Lift System. |