The USP Rolling Steel Fire Doors are designed to automatically close in case of a fire and stop it from spreading from one area to another for a maximum of three hours. These fire rolling doors are up to 159 square feet in area and up to 13 feet 6 inches in width or 12 feet in height. These fire doors are manufactured with UL Labels Class A , B,or C. The fire doors can be over these dimensions but less than 43 feet 6 inches wide and 26 feet high and are supplied with UL oversize certificates. Although UL rated and automatically closing, they can still be used as coiling service doors.

These fire shutters are Furnish Rolling Service Doors, series 700 as manufactured by “USP” complete with curtain, hood, guides, counterbalance, and options as specified.


  • UL,3,1 1/2 and 3/4 hour labels
  • Smoke protection available
  • Automatic closing during fire
  • Available to fit openings 43’6”’wide x 26’ high
  • Maximum reliability
  • Viscous Governor Technology
  • 165˚ Fusible Link


  • manual lift
  • removable crank or chain hoist using gear reduction
  • external industrial motors
  • CGO – Chain hoist and crank with automatic testing
  • FDC-1000 Automatic Resetting Fire Door Motor Operator
  • FGH – Easy Reset FireDoor Motor Operator



Details For This Fire Door

The curtain consists of interlocking slats that are cold rolled formed from hot dipped galvanized steel, optional baked on gray polyester enamel coating, or 304 stainless steel with a number 4 finish curved profile (SC3) or flat profile (SF3). Each end of the alternate slats are to be assembled with end locks to maintain slat alignment and to act as a wearing surface inside the door guides. The slats are designed to withstand windloads of 20 psf. The windlocks are furnished for greater windloads and upon request(consult the factory). The slat thickness shall be calculated with U.S. gauging with a minimum of 20ga. for doors up to 20 feet wide and 18ga. for wider spans. The steel slats are to be hot dipped galvanized as per A.S.T.M. A653. Each curtain shall receive a bottom bar to maintain slat alignment and posture.

The bottom bar shall consist of two steel shop primed angles a minimum ⅛ inch thick.

The spring counterbalance is to be housed in a steel pipe of the appropriate diameter and the wall thickness is to support the curtain. The deflection shall be limited to a maximum of .03 inch per foot of door width. The springs are to consist of helical torsion type of design to meet a 25 percent safety load factor. The safety factor allows for safe operation, ease of use, and longer spring life. The springs are to be grease packed and anchored, using a cast iron anchor, to a cold rolled steel inner shaft. The spring tension shall be fully adjustable from outside of the end bracket plate. To ensure smooth operation, the end bracket plates shall contain sealed ball bearings to minimize the wear of the pipe shaft.

The drop mechanism consists of a viscous speed governor, which controls the door’s rate of descent in the emergency mode. The viscous governor is self adjusting and provides a smoother and quieter rate of descent within the NFPA 80 specification of 6 inches to 24 inches per second. The automatic drop mechanism may be activated by a fire alarm, smoke or heat detector, or a melting fuse link at 165 degrees Fahrenheit (74 degrees Celsius)

The end bracket plates shall consist of the steel plate of no less than ¼ inch thick. The bracket plates are to house pipe shaft and the counterbalance assembly. The shaft is attached to the plate by sealed ball bearings fitted onto the plate.

The guides shall consist of a minimum of 3 inches of structural steel angles and a minimum of 3/16 inch thick. The guide depth shall be of a length adequate to provide for proper slat penetration.

The hoods shall consist of a minimum of number 24 gauge hot dipped galvanized steel. The hoods are designed to protect and house counterbalance assembly. To prevent hood sag, intermediate supports shall be furnished as required.

The locking for manual and chain operated doors are to be slide bolts mounted on a bottom bar with provisions for padlocks. The gearing within are motors to be self-locking.

The finish for all non-galvanized surfaces shall receive a shop coat of rust inhibiting primer. The field painting is not included in this section.

Installation is to be by USP or by an authorized dealer.


  • Baked on gray polyester enamel slats
  • Stainless steel slats
  • Poly-cote® polyester powder coating, 200 select colors
  • FDC-1000 Automatic Resetting Fire Door Operator with Battery Backup
  • Easy reset chain hoists, cranks, motor operators
  • LM Series Fire/Smoke Control System
  • Smoke detector
  • Sounder
  • Strobe light
  • Voice warning
  • Flame stop baffle
  • UL seals

Protect your business with our fire shutter doors!