The Cookson Company - Extreme 324 High Performance Grille


Model Number: EPG324 and EPG324B

For building owners and maintenance managers tired of repairing or replacing commercial doors or grilles, the Extreme 324 High Performance Grille is the answer.

Category: aluminum grilles | aluminum roll-up doors | automatic doors...

MasterFormat: Metal Doors and Frames | Specialty Doors and Frames | Coiling Doors and Grilles...

The Cookson Company
800 Tulip Drive
Gastonia, NC 28052
Tel: (800) 294-4358
Fax: (704) 867-6101

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Extreme 324 High Performance Grille

Model Number: EPG324 and EPG324B

For building owners and maintenance managers tired of repairing or replacing commercial doors or grilles, the Extreme 324 High Performance Grille is the answer. Ideal for parking garages or other high traffic openings, the 324 Grille delivers 300,000 maintenance-free cycles, with an operated speed of up to 24” per second and a 5 year warranty.

Our Extreme 324 High Performance Grille:

  • Opens 3 times faster than a standard rolling grille
  • Has a sustainable and durable design rated for continuous duty
  • Features a 5 year warranty on the operator and a 2 year/300K cycle warranty on the additional components
  • Complies to the UL 325 standards for occupant safety
  • Accepts virtually all activation systems


Our 324 High Performance Grilles come in the following standard height and width parameters:

If your maximum height is less than or equal to…

…your maximum width available is:





Standard Materials and Finishes

The 324 Performance Grille’s open air design provides increased visibility and ventilation. Curtains are assembled with heavy duty 5/16” diameter aluminum alloy rods spaced at 2” on the center with aluminum tube spacers specifically placed to create two pattern options:

  • Brick Pattern
  • Straight Pattern
Curtains can come in the following finishes:

Clear anodized
Medium bronze anodized
Dark bronze anodized
Black duranodic

Drive and Control System

Motor: Our 324 Performance Grille is powered by a UL listed, SEW Eurodrive TEFC NEMA4 variable speed motor with sprocket and chain drive horizontally mounted directly to the unitized structure. This operator also features a patent-pending high performance brake, which prevents the curtain from free-falling in the unlikely event of operator component failure.

Control Panel: The 324 Performance Grille is controlled with a wall-mounted starter. This PLC controller features a variable frequency drive with a soft-start and soft-stop at both ends of limit travel. For harsh weather environments, the controller is NEMA 4 rated. Dimensions of the control panel are 20” x 24” x 8.”


Hood and Operator Covers

Metal cover to protect the coil or operator from exterior weather, debris or to meet OSHA or UL 325 safety requirements.

Powder Coating - Grilles

Powder coat finish in more than 180 colors is available on perimeter components such as the aluminum bottom bar, hoods, wall angles, tubes and fascia. This finish is not available on the grille curtain.

Performance Upgrades

Seismic Performance Validation

We can provide project specific seismic calculations for all coiling doors that are mounted Face of Wall or Between Jambs to steel or masonry. Seismic performance validation is per ASCE 7-05.

Safety and Protection

Entrapment Protection Devices

Entrapment protection devices ensure that a motorized door or grille will not close on an object. If an object enters path of closure, the entrapment protection device will stop the door or grille from closing and return it to the fully open position.

Guide-Mounted Interlocks
An electrical cutout switch to prevent motor operation if locking device is not first disengaged.


A wide variety of locking options are available to meet your security needs.

Unique Design Solutions

Sloping or Irregular Openings
Our special bottom bar designs can address these conditions.

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