Manufacturer of 
Quality Rolling Steel Doors

Made In USA

Auto Fire-Tite® IMB - Automatic Closing Fire Doors


Product Features

  • High quality rolling metal fire doors with insulated metal back
  • Optional internal flame baffle prevents infiltration through header
  • Approved for roll down stainless steel fire doors
  • Oversize UL label up to 56′x30′
  • Overhead fire rated doors are built in accordance with the requirements specified by Underwriters Laboratories Inc.
  • STC rating of 23
UL ULC Classified Fire Doors

3 or 4 Hour approved for an auto-set coiling fire door in dividing fire walls with openings not exceeding 152 sq. ft. in area. • 1.5 Hour approved for industrial fire doors in vertical shaft openings not exceeding 152 sq. ft. in area. • .75 Hour approved for doors in corridor or room-partition opening not exceeding 152 sq. ft. in area. • 1.5 Hour approved for roll down doors in exterior wall opening not exceeding 152 sq. ft. in area.

The Auto Fire-Tite® IMB steel coiling fire door has the same features as the Fire-Tite® IMB with controlled automatic closing by one of Alpine’s Redi-Reset motor, hand chain or crank options. The Auto Fire-Tite® IMB insulated fire rated shutters can be connected to smoke detectors and fire alarms as well as any building alarms. The Redi-Reset operator eliminates the complication of a manual reset after drop testing or activation. The Auto Fire-Tite® IMB fire rated frame is also labeled for up to 4 hours of fire protection by UL and NYC MEA.

Auto Fire-Tite® IMB curtains come with Redi-Reset and are constructed of galvanized steel and can be finished with powder coating or baked enamel finishes. The metal on metal insulated slats have a 7/8″ fiberglass core which bonds the metal skin and strengthens the slat. Each door is equipped with a 22 gauge steel hood formed to fit the contour of the end brackets. This coiling fire door has durable ductile iron endlocks with 1/4″ semi-solid rivets. Our steel fire door and fire rated frame supports and brackets are all steel plates no less than 1/4″ thick. Alpine’s Torsion Counterbalance Assembly for these fire rated shutters is state of the art, providing maximum security and ease of use.