Fire door, storm door, overhead rolling door
Alpine’s Fire-Tite® Doors are constructed to conform within requirements specified by Underwriter’s Laboratories. Inc. (U.L.). Doors are automatic and self-closing through an isolating governing release system, Class (A) (B) (C) (D) or oversized certificate. Class (A) – 3 hour approved for doors in dividing fire walls with openings not exceeding 162 sq. ft. in area. Sizes above 162 sq. ft. will be oversized. Class (B) – 1.5 hour approved for doors, in vertical shaft openings