NB-20HZ

Category NB-20HZ

NB-20HZ

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It is engineered for use in high-velocity hurricane zones with large and small missile impacts as approved by the Miami-Dade County and Florida Building Commission.</p>\r\n<p>It features an automatic hold-open arm that locks the cover in the open position to ensure safe egress with an overlapping cover design that is fully welded corners on the cover and curb. The NB 20HZ also offers a fully insulated cover and curb to ensure weather tightness and energy efficiency.</p>\r\n<p><br /><br /></p>\r\n<p>Guide Specifications:</p>\r\n<ul>\r\n<li>Material (select one):&nbsp;</li>\r\n</ul>\r\n<p>Steel: Cover and frame are 14 gauge (2 mm) G-90 paint bond galvanized steel.&nbsp;</p>\r\n<p>Aluminum: Cover and frame are 11 gauge (2.3 mm) aluminum.&nbsp;</p>\r\n<p>Stainless Steel: Cover and frame are 14 gauge (2 mm) type 304 stainless steel</p>\r\n<ul>\r\n<li>Cover: Brakeformed, hollow-metal design with 1\" (25 mm) concealed fiberglass insulation, 3\" (76 mm) beaded, overlapping flange, fully welded at corners, and internally reinforced for 40 psf (195 kg/m2) live load.</li>\r\n</ul>\r\n<ul>\r\n<li>Curb: 12\" (305 mm) in height with integral cap flashing, 1\" (25 mm) fiberboard insulation, fully welded at corners, and 3-1/2\" (89 mm) mounting flange with 7/16\" holes (11 mm) provided for securing the frame to the roof deck.</li>\r\n</ul>\r\n<ul>\r\n<li>Gasket: Extruded EPDM rubber gasket permanently adhered to cover.</li>\r\n</ul>\r\n<ul>\r\n<li>Hinges: Heavy-duty pintle hinges with 3/8\" (9 mm) Type 316 stainless steel hinge pins.</li>\r\n</ul>\r\n<ul>\r\n<li>Latch: Slam latch with interior and exterior turn handles and padlock hasps. (For Type NB-20HZ and NB-50HZ Miami-Dade County approved models: Specify enclosed two-point spring latch with interior and exterior turn handles and padlock hasps)</li>\r\n</ul>\r\n<ul>\r\n<li>Lift Assistance: Compression spring operators enclosed in telescopic tubes. Automatic hold-open arm with grip handle release.</li>\r\n</ul>\r\n<ul>\r\n<li>Finish:&nbsp;</li>\r\n</ul>\r\n<p>Steel: Alkyd base red oxide primer.&nbsp;</p>\r\n<p>Aluminum: Mill Finish.&nbsp;</p>\r\n<p>Stainless Steel: Type 304 stainless steel with bead blast finish</p>\r\n<ul>\r\n<li>Hardware:</li>\r\n</ul>\r\n<p>Steel: Engineered composite compression spring tubes and steel compression springs packed in grease. All other hardware is zinc plated/chromate sealed.&nbsp;</p>\r\n<p>Aluminum: Engineered composite compression spring tubes and steel compression springs packed in grease.Type 316 Stainless steel hinges. All other hardware is zinc plated/chromate sealed.&nbsp;</p>\r\n<p>Stainless Steel: Type 316 stainless steel.</p>\r\n<p>Our world-class customer service team looks forward to discussing all your Access Door needs today! Feel free to contact us at 1-800-609-2917 or by email via info@accessdoorsandpanels.com</p>\r\n<p><a href=\"https://www.accessdoorsandpanels.com/content/specs/NB-20HZ.pdf\" target=\"_blank\"><img title=\"Download\" src=\"https://cdn11.bigcommerce.com/s-d6xnuf/product_images/uploaded_images/download-button.png\" alt=\"download\" /></a></p>","image":{"data":"https://cdn11.bigcommerce.com/s-d6xnuf/images/stencil/{:size}/u/nb-20-hz - main__81912.original.jpg","alt":"NB-20HZ"},"subcategories":[]}

The NB 20HZ Steel Cover and Frame Roof Hatch is a prime example of durability and stability. It is engineered for use in high-velocity hurricane zones with large and small missile impacts as approved by the Miami-Dade County and Florida Building Commission.

It features an automatic hold-open arm that locks the cover in the open position to ensure safe egress with an overlapping cover design that is fully welded corners on the cover and curb. The NB 20HZ also offers a fully insulated cover and curb to ensure weather tightness and energy efficiency.



Guide Specifications:

  • Material (select one): 

Steel: Cover and frame are 14 gauge (2 mm) G-90 paint bond galvanized steel. 

Aluminum: Cover and frame are 11 gauge (2.3 mm) aluminum. 

Stainless Steel: Cover and frame are 14 gauge (2 mm) type 304 stainless steel

  • Cover: Brakeformed, hollow-metal design with 1" (25 mm) concealed fiberglass insulation, 3" (76 mm) beaded, overlapping flange, fully welded at corners, and internally reinforced for 40 psf (195 kg/m2) live load.
  • Curb: 12" (305 mm) in height with integral cap flashing, 1" (25 mm) fiberboard insulation, fully welded at corners, and 3-1/2" (89 mm) mounting flange with 7/16" holes (11 mm) provided for securing the frame to the roof deck.
  • Gasket: Extruded EPDM rubber gasket permanently adhered to cover.
  • Hinges: Heavy-duty pintle hinges with 3/8" (9 mm) Type 316 stainless steel hinge pins.
  • Latch: Slam latch with interior and exterior turn handles and padlock hasps. (For Type NB-20HZ and NB-50HZ Miami-Dade County approved models: Specify enclosed two-point spring latch with interior and exterior turn handles and padlock hasps)
  • Lift Assistance: Compression spring operators enclosed in telescopic tubes. Automatic hold-open arm with grip handle release.
  • Finish: 

Steel: Alkyd base red oxide primer. 

Aluminum: Mill Finish. 

Stainless Steel: Type 304 stainless steel with bead blast finish

  • Hardware:

Steel: Engineered composite compression spring tubes and steel compression springs packed in grease. All other hardware is zinc plated/chromate sealed. 

Aluminum: Engineered composite compression spring tubes and steel compression springs packed in grease.Type 316 Stainless steel hinges. All other hardware is zinc plated/chromate sealed. 

Stainless Steel: Type 316 stainless steel.

Our world-class customer service team looks forward to discussing all your Access Door needs today! Feel free to contact us at 1-800-609-2917 or by email via info@accessdoorsandpanels.com

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