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1) During lighting plotting, to construct a state from blackout, or to add to an existing state. 2) An increase in light or sound level. See Check. 3) A period of set construction ("The Build")
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A continuously variable signal that can have any value over a given range. For example, an analogue voltage within the range 0 to 10 Volts can have values of 0, 2, 8.785 or any value between. Most dimmers require an analogue voltage in order to operate (from 0 to -10V or 0 to +10V depending on the manufacturer). Most lighting control desks produce a digital multiplexed output, which is converted by a demux box to an analogue signal for the dimmer. See also Digital dimmer.
Two or more wires, ropes or chains attached by a ring, eye or shackle to the end of a grid line and fitted at distances apart with clips to a barrel or batten and thus distributing the load.
An elevator which raises and lowers sections of the stage floor, usually by electrical or hydraulic means.
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Hinge frequently used in Scenic Construction.
A fireproof curtain that can be dropped downstage of the tabs to separate the audience from the stage in the event of fire. A Safety Curtain is required by most licensing authorities for theatres over 500 seats. The regulations also require that it is raised and lowered at least once in view of each audience (usually during the interval). Usually made from sheet metal and electrically operated, used to be made from iron faced with asbestos and lowered using a hydraulic damping system. Colloquially known as the "iron". See also Drencher.
Usually the first time the show is rehearsed in the venue, with lighting, scenery and sound. Costumes are sometimes used where they may cause technical problems (eg Quick changes). Often a very lengthy process. Often abbreviated to the Tech.
The strength of a vibrating wave ; in sound, the loudness of the sound.