a fireproof theater curtain to be dropped in case of fire
A safety curtain is a fire safety precaution used in large proscenium theatres. It is usually a heavy fibreglass or iron curtain located immediately behind the proscenium arch. Asbestos-based materials were originally used to manufacture the curtain, before the dangers of asbestos were discovered. The safety curtain is sometimes referred to as an iron in British theatres, regardless of the actual construction material. Occupational safety and health regulations state that the safety curtain must be able to resist fire and thereby prevent fires starting on stage from spreading to the auditorium and the rest of the theatre, reducing injuries to audience members and members of staff. The curtain is extremely heavy and therefore requires its own dedicated operating mechanisms. In an emergency, the stage manager can usually pull a lever backstage which will cause the curtain to fall rapidly into position. Alternatively, heat-sensitive components can be built into the rigging to automatically close this curtain in case of fire and finally it may be released electronically by a building's fire control system if any alarm box is operated. It can also be flown in and out, as regulations in some jurisdictions state that it must be shown to the audience, to prove its effective operation, for a certain amount of time during every performance. This usually occurs during the intermission.
The numerical value of safety curtain in Chaldean Numerology is: 8
The numerical value of safety curtain in Pythagorean Numerology is: 9
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"safety curtain." Definitions.net. STANDS4 LLC, 2017. Web. 20 Nov. 2017. <http://www.definitions.net/definition/safety curtain>.