
A type of curtain that will drop in the event of an onstage fire. This curtain prevents the fire from spreading into the audience area.
Found on
http://www.encyclo.co.uk/local/21208

The heavy fire-proof curtain that, in an emergency, is dropped at the front of the stage, effectively sealing the stage from the auditorium and thus slowing the spread of flames. Jargon - The Iron.
Found on
http://www.encyclo.co.uk/visitor-contributions.php

A fire curtain hangs around the perimeter of the stage to protect an audience from a fire, if one occurs during a show. Most close automatically and protect against heat, flames and smoke. Some fire curtains have smoke pocket slots that add additional smoke filtration. It’s important to note that fire curtains do not eliminate the need for a prop...
Found on
https://illuminated-integration.com/blog/theater-glossary/

A non-flammable curtain hung directly behind the proscenium that protects the audience from fire or smoke emitting from the stage.
Found on
https://www.encyclo.co.uk/local/20411
No exact match found.