These fire shutters are the USP Rolling Steel Fire Shutters 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. Doors up to 159 square feet in area and up to 13 feet 6 inches in width or 12 feet in height are manufactured with UL Labels Class A, B, or C. Although they are UL rated and are automatically closing, they can still be used as counter shutters.

This fire door is a Furnish Rolling Shutter, series 750 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
  • Viscous Governor Technology
  • Bent Steel Guides
  • Fusible Link
  • Oversized shutters up to 20’ wide


  • manual lift
  • external motors
  • hand crank with or without automatic testing
  • tubular motors with or without automatic testing
  • FDCL-1000 Automatic Resetting Fire Door Operator



The Curtain Model 750 consists of interlocking slats that are cold roll formed from hot dipped galvanized steel with an optional baked on gray polyester enamel coating or 304 stainless steel with a number 4 finish flat profile SF1. Each end of alternate slats are to be assembled with galvanized steel end locks to maintain the slat alignment and to act as a wearing surface inside the door guides. Slat thickness shall be calculated with U.S. gauging with a minimum of 22 gauge. 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 the slat alignment and posture.

The bottom bar shall consist of two steel factory painted angles a minimum ⅛ inch thick. The bottom bar shall be provided with a lift handle and slide bolts.

The spring counterbalance is to be housed in a steel pipe of the appropriate diameter and wall thickness as to support the curtain. The deflection shall be limited to a maximum of .03 inch per foot of door width. Springs are to consist of helical torsion type designed to meet a 25 percent safety load factor. Safety factor allows for a safe operation, ease of use, and a 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 a smooth operation, the end bracket plates shall contain sealed ball bearings to minimize the wear of the pipe shaft.

The end bracket plates shall consist of factory painted steel plates no less than ⅛ inch thick. The bracket plates are to house the pipe shaft and counterbalance the assembly. The shaft is attached to a plate by the sealed ball bearings fitted onto the plate.

The drop mechanism consists of a viscous speed governor, which controls the door’s rate of descent in 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 165º (74ºC)

The guides shall consist of bent steel shapes that are a minimum of 2-½ inches deep and ⅛ inch thick. The guides will bolt together and feature a removable door stop. The guide depth shall be of a length adequate to provide for the proper slat penetration.

The hoods shall consist of a minimum of number 24 gauge hot dipped galvanized steel with a baked on gray or bronze polyester enamel coating. Hoods are designed to protect and house the counterbalance assembly. To prevent a hood sag, intermediate supports shall be furnished as required.

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

The finish for all non-galvanized surfaces shall receive a factory coat of rust inhibiting enamel. 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
  • Tubular bottom bar
  • Cylinder locks
  • FDCL-1000 Automatic Resetting Fire Door Operator with Battery Backup
  • LM90 Fire Control System
  • Smoke detector
  • Sounder
  • Strobe light
  • Voice warning
  • Flame stop baffle
  • UL seals

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