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Products » Rolling Doors » Security Rolling Grilles

Security Rolling Grilles

General System Description

Rolling grills offer total security and allowing free circulation of air and full visual access to the area being protected.



Curtain is to be fabricated of 5/16" (8 mm) diameter solid horizontal aluminum rods in Mill Finish. The spaces between vertical links are 9" (228.6 mm) and between horizontal links are 2" (50.8 mm).

Bottom Bar:

2 x 3-1/2" (50.8 x 88.9 mm) extruded aluminum tubular section in Mill Finish.


Heavy duty extruded aluminum sections in Mill Finish with polypropylene pile runners on both sides of the curtain.

Counterbalance Shaft Assembly:

Barrel: Steel pipe capable of supporting curtain load with maximum deflection of 0.3" per foot (2.5 mm per meter) of door width.

Spring Balance: Oil-tempered, heat-treated steel helical torsion spring assembly designed for proper balance of the grill to ensure that maximum effort to operate will not exceed 25 Ibs (110N).


Fabricated from minimum 3/16" (4.76 mm) steel plate with permanently lubricated ball bearings at rotating support points to support counterbalance shaft assembly and form end closures.

Brackets Finish: Phosphate treatment followed by Light Gray backed-on polyester powder coating, minimum 2.5 mils (0.065 mm) cured film thickness.


Cylinder bottom bar locking on each jamb operable from both sides (Coil And Fascia).


Cornell Operator Model MGH (SGH) , high starting torque with overload protection (bracket mounted) rated 1/3, 1/2, 3/4, 1 or 2 HP, 230 Volts, Single Phase or 380 Volts (Three Phase), 50 Hz. Complete with totally enclosed motor and factory pre-wired motor controls, solenoid actuated brake, emergency manual chain hoist, and 3-button OPEN/CLOSE/STOP control station.

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