Weather-stripped Specifications

  1. Operation
    Doors to be chain hoist operated using gear reduction and galvanized handchain as standard.
  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 shall be constructed of interlocking cold roll formed continuous slats of galvanized steel (aluminum or stainless steel). Steel slats available in 22 (20 or 18) gauge material. Slats to be flat F type galvanized with a coating of zinc as per ASTM standard Doors designed to satisfy windload of 20 PSF (87 MPH) Special windloads are available, consult factory.
  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 with neoprene loop bottom astragal to provide positive seal.
  7. Counterbalance Shaft
    Roller shaft shall be of steel pipe of sufficient diameter to reduce deflection so as not to exceed 0.03 inch per foot of span. Springs are to be grease packed and are to be mounted on a cold rolled steel inner shaft. Springs shall be 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 end bracket.
  8. Brackets
    Brackets shall be of minimum 3/16″ thick steel (galvanized steel) designed to form an end closure support for the hoof and fitted with self lubricating bronze bearings or permanently lubricated sealed ball bearings.
  9. Weatherstripping
    Weather-stripped hood baffles are a combination of metal with neoprene edge attached to the inside of the hood providing weather tightness around the coil. The weather-stripped door has a neoprene loop astragal which insures tight contact with the sill.
  10. Hoods
    Hoods shall be minimum 24 gauge hot dipped galvanized steel (aluminum or stainless steel) formed to fit contour of end brackets and reinforced with stiffening bends at top and bottom edges with air baffles to provide positive seal. Hoods over 12′ shall be laterally reinforced with internal hood supports to prevent sagging.
  11. Locking
    Slide bolts on bottom bar for manual push-up doors (Hand Chain Lock: locking bracket for handchain mounted on guide angle) (Integral Gearing: of motor operator to provide locking for door).
  12. Finish
    Non-galvanized surfaces (except bearings) shall be given one coat of factory applied 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. Install bracing and supports as necessary to rigidly secure door operating equipment.

Optional Features

  1. Motor Operation
    (add) Motor operator to include high starting torque motor, reduction gearing, solenoid brake, limit switches for upper and lower limits of door travel, emergency hand chain with electrical interlock to break motor circuit when hand chain is engaged, magnetic relay contactor, overload protection, pre-wired terminal block and 3 button operating station. Motor is to be removable for repair without effecting emergency operation. Manufacturer to furnish wiring diagram. Field wiring not included in this section.
  2. Safety Edge
    To be furnished on motor operated grilles, which upon contact with obstruction, are to stop and reverse the downward travel.
  3. Vision Lites
    (add) Can be provided in flat slat curtains. Furnish clear acrylic plastic sections over individual slat cutouts, each 6″ wide x 1-1/4″ high, in sets of eight cutouts, four slats high, two cutouts wide. (Perforated slats can be provided each 6″ wide x 1 1/4″ high or furnish 1/16″ diameter holes spaced 3/32″ on center).
  4. Primed Finish
    (add) Galvanized slats shall have a baked-on coat of epoxy modified polyester.
  5. Curtains
    Alternate Curtain designed to be furnished with linking spacing at (6″) (4″) (3″) on centers. For alternates consult factory.
  6. Cylinder Locks
    To be provided, engaging at both ends (and at center of opening) concealed within bottom bar, operable one side (both sides) (one side with thumb turn opposite side)