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 ?
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.
Below Her Mouth receives a triple F-rating for queer female director, female writer, female producer, cinematographer, crew and female leads
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.