F-rating

F-rating

A fire performance rating of a fire-stopping system, measured in terms of period of time that the system will limit the passage of fire through it when tested according to the applicable code.
References in periodicals archive ?
"mother!" joins  Brad Pitt's "Killing Them Softly" and Cameron Diaz's "The Box" in the exclusive F-rating club, which is generally reserved for horror movie titles, according to (http://www.hollywoodreporter.com/news/darren-aronofksys-mother-banished-infamous-f-cinemascore-club-1039885) The Hollywood Reporter .
IMDb the world's largest movie website, adopts a new 'F-rating' to highlight films that are directed by women, written by women, and/or pass the Bechdel test
Fire Stop, a four-hour fire-rated silicone sealant with F-rating (flame), T-rating (thermal) and L-rating (smoke), can resist fire up to 750 deg C.
As a state legislator, Wendy earned an F-rating from the NRA by voting against the Second Amendment repeatedly," said NRA spokeswoman Catherine Mortensen.