Fire door frames of the single unit, knock-down, pressed steel, slip-on type for non-masonry walls, at least 4" thick. For installation of hollow metal fire doors in 20 - 90 minute locations.
This frame design conforms to the minimum requirements of UL 63.
MAXIMUM SIZE
SINGLE SWING
3'8" wide x 8'0" high
STANDARD PAIRS
7'4" wide x 8'0" high
Fire door frames of the single unit, knock-down, pressed steel, slip-on type for non-masonry walls, at least 2" thick. For installation of hollow metal fire doors in 20 - 90 minute locations.
This frame design conforms to the minimum requirements of UL 63.
MAXIMUM SIZE
SINGLE SWING
3'8" wide x 8'0" high
STANDARD PAIRS
7'4" wide x 8'0" high
