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  Model ADBG-DR, TR - Extra Heavy Duty Duct / Barrier Grille  
       
 
Standard Features

ADBG-DR - High Tensile Steel
  • Vertical Round Bars: 7/8” diameter high tensile strength steel double ribbed bars 6” on centers interlocked with horizontal bars. Non heat-treated.
  • Horizontal Flat Bar: 2-1/2” x 3/8” high tensile strength steel flat bars and interior frame. Stitch welded to sleeve. Non heat-treated.
ADBG-TR - Heat Treated Steel
  • Vertical Round Bars: Same as above except heat treated to meet ASTM A-627 Standard for Tool Resisting Steel
  • Horizontal Flat Bar: Same as above except heat treated to meet ASTM A-627 Standard for Tool Resisting Steel
ADBG-DR & ADBG-TR
  • Sleeve: 10 ga. steel sleeve (specify length) with continuously welded seams.
    Round sleeve: Not Available
  • Locking Angle Frame: 1" x 1" x 3/16" welded one piece steel angle (shipped loose for field installation). Other sizes available - consult factory.

Finish

  • Standard: White Powder Coat Finish
  • Optional: Rust Inhibiting Prime Coat. Consult factory for other finishes
Optional Features
  • Anchoring studs: in lieu of angle frames for Precast concrete or block construction.
  • Adapter: square to round (shipped loose)

Construction

The double ribbed bars pass through the pre-punched flat bar and locked in place on 6” centers. Flat bars are stitch welded to the inside of the sleeve and intermediately on
12” centers maximum.

Installation

The unit is installed through the wall and is secured on each side by locking frames. One frame is factory welded and the other frame is shipped loose for field attachment. See Installation Overview.
 
 
Installation Overview
and
Tamperproof Screws