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 not exceeding 162 sq. ft. in area. Sizes above 162 sq. ft. will be oversized.
Class (C) – 0.75 hour approved for doors in a corridor or a room-partition opening not exceeding 162 sq. ft. in area. Sizes above 162 sq. ft. will be oversized.
Class (D) – 1.5 hour approved for doors in an exterior wall opening not exceeding 162 sq. ft. in area. Sizes above 162 sq. ft. will be oversized.
4 Hour Rated (Optional)- Approved for doors with openings not exceeding 162 sq. ft. in area. Sizes above 162 sq. ft. will be oversized.
Rolling Doors 101: Anatomy, Styles, and Applications
A dealer’s in-depth guide to selecting the best door for the job This article by Alpine Overhead Doors originally appeared in the Spring 2024 Edition
