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.
Common Mistakes When Installing Rolling Steel Doors
This article by Alpine Overhead Doors originally appeared in the Winter 2024 Edition of DASMA’s magazine, Door + Access Systems. Republished with permission. > Click here to view/download
