Fire-rated doors.

Karpen Steel Custom Doors & Frames has announced the addition of Temperature Rise Doors to its product offering. These doors are UL labeled 1 1/2 hour, 250[degrees] Temperature Rise, in A60 Galvanneal material. Single sizing up to 4'-0" x 5-0" and pair sizing up to 8'-0" x 8'-0", with up to 100 square inches of exposed glass. The STC-47 Acoustic Door and Frame Assembly is now available with UL labeling up to 1 1/2 hours for a 3'-0" x 7'-0" opening. The assembly comes complete with door, frame, sound seal hardware, and cam lift hinges. In addition, Karpen Steel can now label 1 3/8" thick doors up to 1 1/2 hours with 100 square inches of exposed glass, and a door size up to 3'-0" x 7-0". Also, 2" thick doors can be labeled with a maximum door size of 4'-0" x 10'-0".