Fire Doors

  1. Operation
    Fire Doors to be manual push-up operated; chain hoist operated using gear reduction and galvanized handchain; motor operated. NOTE:Doors shall be operated manually in general service by means of handles on the bottom bar. Doors shall be operated mechanically in general service by means of chain-gear operator-handchain to be galvanized. All gears to be high grade gray-iron cast from machine cut patterns. gear reduction shall be calculated to reduce pull exerted on handchain not to be over 35 pounds.
  2. Mounting
    To be inferior face mounted on a prepared opening; interior mounted between jambs and under lintel in a prepared opening
  3. Work Not Included
    Opening preparation, miscellaneous or structural steel, access panels, finish or field painting, electrical wires, wiring, disconnect switches, mounting of controls, conduit are in scope of the work of other sections or trades.
  4. Curtains
    Curtains are to be constructed of interlocking roll-formed galvanized steel slats (stainless steel) with a coating of zinc not less than 1.25 ounces per square foor of flat metal, per ASTM standards. Curtains shall be equipped with a rolled galvanized steel (stainless steel) bottom bar consisting of two angles of equal weight, one on each side, securely fastened to the bottom of curtain for reinforcement and to provide contact against sill when closed.
  5. Endlocks
    The end of alternate (continuous) slats shall be fitted with (malleable iron) endlocks to act as a wearing surface in the guides and prevent lateral movement of slats.
  6. Bottom Bar
    Bottom bar shall consist of two galvanized steel angles (aluminum or stainless steel) of equal weight and size, one on each side.
  7. Counterbalance Shaft
    Shall be steel pipe of sufficient diameter to reduce deflection not to exceed 0.03 inches per foot of span. Ends of roller shaft shall be completely closed by cast-iron plugs. Roller shaft shall house all counter balancing mechanism including an oil tempered helical torsion spring capable of producing sufficient torque to assure easy operation of the door curtain from any position. Spring tension shall be adjustable by means of an adjusting wheel on the outside of the end bracket.
  8. Brackets
    Brackets shall be of heavy cast iron or steel, designed to form an end closure support for the hood. Ends of roller shaft shall be journalled into bracket hubs of sufficient thickness to provide ample bearing surface for load of roller shaft and curtain. Operator bracket hub and plug in spring end of shaft shall be fitted with self-lubricating bronze bearings or permanently lubricated, sealed ball bearings.
  9. Guides
    Guides shall be formed of structural steel (galvanized steel) (stainless steel) angles minimum 3/16″ thick. The guides shall be attached to jambs, plumb and true, by bolts of not less than 3/8″ diameter, spaced not more than 1′-6″ on centers.
  10. Hoods
    Hoods are to be fabricated of not less than 24 gauge Bonderized hot-galvanized steel (24 gauge stainless steel) and formed to fit contour of end brackets in a neat manner and reinforced at top and bottom with rolled flanges.
  11. Locking
    For Class A, B and C Labeled Doors) The ends of each interlocking slat shall be fitted with malleable-iron endlocks which shall act as a wearing in the guides and prevent lateral movement of individual curtain slats. (For ClassD Labeled Doors) The ends of alternate interlocking slats shall be fitted with malleable-iron endlocks which shall act as a wearing surface in the guides and prevent lateral movement of the individual curtain slats.
  12. Finish
    Galvanized steel for curtain slats shall have 1.25 ounces of zinc per square foot per ASTM standards. Other surfaces of door parts shall be given one shop coat of rust inhibiting primer.
  13. Erection
    All doors shall be erected by the manufacturer or his authorized representative having a minimum of five (5) years experience in the installation of similar type doors.

Optional Features

  1. Motor Operation
    (add) To be integral assemblies with NEMA rated electrical components, Model, consisting of high torque motor, braking system, self-locking gearing, emergency chain operator with disconnect and electrical safety interlock, internal reversing magnetic controller, push-button station with open-close-stop, internal pre-wiring. Motor may be removed for service without affecting emergency chain operation or limit switch settings.
  2. Finish
    (add) Galvanized steel slats shall have a baked-on coat of epoxy modified polyester.