Sheet Metal Access Door Tab Lock Frame

Sheet Metal Access Door Tab Lock Frame


Metal Zinc’s Sheet Metal Access Door with Tab Lock Frame is used to access the inside of sheet metal rectangular ductwork


  • Double panelled with front and back metal plates and 1½” insulation
  • Meets 2005 SMACNA Standards for pressure class and gauges (Refer to page 7.2; figure 7-2)
  • Regular doors can be used up to 4” water gauge
  • Tab lock frame easily bends over sheet metal

Standard Construction

  • Door panel is manufactured from 24-gauge galvanized steel ASTM A653. Panels mechanically locked together.
  • Insulation is 1½” high-density fiberglass insulation UL Classifications; FHC25/50, ASTM C 1071; Type 1 ASTM G 21, Greenguard Indoor Air Quality Certified, Greenguard Children and Schools, NFPA 90A and 90B.
  • Gasket is closed-cell neoprene, UL94HF1 listed with service temperature range of 20º F to 200º F. The gasket is bonded to the inside of the frame.
  • Dovetail Frame measuring “6 x 6” to 12” x 12” are manufactured from 26-gauge galvanized steel. Frames measuring 14” x 14” to 24” x 24” are manufactured from 24-gauge galvanized steel.
  • All frames are manufactured with spot welds at each corner for increased strength and improved dovetail design for easy installation on metal ducts.
  • Cams & Strikes: The cam is stamped using 16-gauge galvanized steel. The latch is stamped from 20-gauge galvanized steel. Each cam is secured to the door with a rivet. The latch is secured to the frame in two locations for added rigidity.

Optional Construction

  • Additional cams
  • Aluminum
  • Galvanneal (paint grip)
  • Neoprene gasket bonded outside the frame
  • PCD
  • Stainless steel 304 and 316
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Product specifications

Metal Zinc Part Number Size A & B Gauge Number of Cams Bundle Quantity Pallet Quantity
AD0010-TB6 x 624210TBD
AD0020-TB8 x 824210720
AD0030-TB10 x 1024210396
AD0040-TB12 x 1224210294
AD0050-TB14 x 1424210TBD
AD0060-TB16 x 1624410TBD
AD0070-TB18 x 1822410TBD
AD0080-TB20 x 2022410TBD
AD0100-TB22 x 2222410TBD
AD0110-TB24 x 2422410TBD
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