The Fire-Rated Counter Doors Model 640 are ideal for openings requiring a counter-type fire-rated door. Common applications include factories, schools, concessions, hospitals, cafeterias and retail settings. Labeled with either a 3-hour Class A rating for masonry applications, or a 1 1/2-hour Class B label in non-masonry fire walls, these doors are designed to expand upward in a fire, allowing the guides to be installed flush with the sill. This counter fire doors are UL approved and can be custom designed for conveyor openings. Their compact, box-like form also provides an attractive finished appearance that requires minimum side room. This fire-rated counter door has exposed components made of primed galvanized steel. A host of standard and optional features further enhance performance of these doors for fire-rated applications.
These fire-rated counter doors feature fusible links. These links separate at 165°F (74°C) for ambient conditions under 100°F (38°C), or at 212°F (100°C) for ambient conditions over 100°F (38°C), to close the door automatically under governor control. These doors meet strict fire safety testing standards, including New York City (MEA) and State of California (CSFM) requirements.