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SD52 Submittal Drawing
Designed for high volume air delivery
1 1/2 hour fire resistance rating
stair risers
904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 4" Duct Opening (front blades parallel to shortest dimension)
2" Round Horizontal/Vertical Mount Fire Damper 2550-12 Smoke-Fire Damper SD52 Submittal DrawingStandard Features Spring actuated curtain type fire damper with 2 1 4" round connection for horizontal or vertical mount 2" thin line roll formed out of airstream frame Designed for use in walls, floors and partitions with fire resistance ratings of 2 hours or less (for ceiling application, see 2700 series) UL listed and tested in accordance with UL Standard 555 1 1 2 hour fire resistance rating Building materials rated 2 hours or less CSFM California
