Rolling Grille Specifications Series AM-670
Operation: Grilles to be manual push up operated (M); chain hoist operated
using gear reduction and galvanized hand chain (C); or motor
Mounting: To be interior face mounted on a prepared opening (F); interior
mounted between jambs on steel tubes by American Door (J).
Not Included: Opening preparation, 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.
Curtains: Are to be fabricated
of horizontal rods spaced not more than 2" on centers
that run continuously from jamb to jamb. End links are to
be specially designed to lock into guides if excessive pressure
is applied. Bottom of curtain to be reinforced with two
steel angles of equal weight, not less than 1/8 thick.
Guides: Are to be of extruded
aluminum with double wool piling to contact both faces of
grille, acting as wearing surfaces and sound deadener.The
guides are to be furnished with supporting steel angles
or plates which, in turn, are to be securely fastened to
the building steel or masonry.
Counter Balance Assembly: Shall
be furnished with oil tempered helical torsion springs designed
to ensure proper counterbalancing action. Springs to be
fixed to tapered cast anchors, permanently lubricated, mounted
on a single solid torsion rod. Torsion rod to be attached
to spring tension adjustment wheel. Assembly to be housed
in steel pipe shaft of adequate diameter, deflection not
to exceed .03 per foot of span.
Brackets: Are to be of steel.
Sealed ball bearings to support the counter balance assembly.
Brackets to form end closures and support hoods (if below
soffit or ceiling installation, hood required).
Hoods: (omit if above ceiling
or soffit) Are to be fabricated of 24 gauge galvanized steel
(24 gauge stainless steel) (#20 B&S gauge aluminum)
and reinforced at top and bottom with rolled flanges. Provide
intermediate hood supports over 14'-0" width.
Locking: Of manual push-up (crank) grilles to be by means of slide
bolt locking device operable from inside or outside. Motor
operated grilles to include self-locking gearing plus chain
locking device for emergency handchain.
Finish: For aluminum surfaces is to be mill (clear anodized) (Duranodic
bronze). Stainless steel to be #4 satin finish. Steel surfaces
are to be painted one shop coat of rust inhibiting primer.
Alternate Curtain: Designed to be furnished with link spacing at (6")
(4") (3") on centers.
For alternates consult factory.
Structural Steel Support Tubes: In standard type weight, with floor seats, to be furnished
by grille manufacturer, sized as required, pre-drilled for
guides and brackets.
Motor Operators: To be integral
assemblies with NEMA rated electrical components, Model
(H) (GH), consisting of high torque motor, braking system,
self-locking gearing, (Model GH gear reducer with worm gears
in oil bath) (Model H chain sprocket 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.
Safety Edge Bottom Bars: To be furnished on motor operated grilles, which upon contact
with obstruction, are to stop and reverse the downward travel.
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)
Emergency Egress Device: To be furnished with pull handle in recessed mounting box
to manually open motor operated grille for emergency exit.
This device does not require electrical power to open grille.
Clear Lexan Panel Inserts: Can be provided in clear or smoke bronze tinted plastic
curtains providing solid closure with full visibility.