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Cookson rolling grilles are an example of Cookson’s uncompromised commitment to quality and value because they have been manufactured with the same proven materials and designs for decades. The grille curtains are still made of 5/16" solid aluminum rods rather than hollow rods and the links are still 1/8" or 3/16" thick aluminum shapes rather than thinner gauge materials. The aluminum extruded guides and bottom bars are still made of heavy-walled shapes. You can buy a cheaper grille, but you can’t buy a better grille.
- Lifetime warranted Whisper Governor controls automatic closing speed of door to a range of 6" to 2' per second (used on all doors except Auto-Test model FDO-B)
- Oil tempered torsion springs designed for 50,000 life cycles
- Structural Angle Guides and Bottom Bar make doors less vulnerable to damage that could prevent the doors from fully closing
- Approved in all sizes Labeled doors up to 163 square feet not exceeding 13'-6" wide or 12'-0" high Oversize labels furnished on larger doors not exceeding 36'-6" wide or 24'-0" high
- Available for 4 hour, 3 hour, 1-1/2 hour and 3/4 hour ratings
- Approved for all wall types (concrete, masonry, structural steel, structural steel with gypsum board)
- Simple-Test Doors are reset from one side of opening reducing testing costs
- Sure-Close release spring on Simple-Test Doors increase reliability of automatic closings
- Auto-Test Doors do not require resetting
- Testing doors in fully closed position will not damage mechanisms
- Revolutionary Soft-Close RPM governing system limits automatic closing speed to a range of 6" to 9" per second (only available on Auto-Test model FDO-B)
- FinalCote finish
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