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Type NB Roof Hatch - Ship Stair AccessZoom In

Type NB Roof Hatch - Ship Stair Access


Type NB roof hatches, 30" x 54" (762mm x 1372mm), are ideal for installations where frequent use may be expected. Permits easier movement of maintenance personnel, tools and equipment. Available in galvanized steel, aluminum, or stainless steel construction.

     


Roof Hatch Models: Type NB-20, NB-40, NB-50, NB-20HZ, NB-50HZ
     
Standard Features and Benefits   
  • Miami-Dade County and Florida Building Commission approval for use in high velocity hurricane zones with large and small missile impact.*
  • Engineered with compression spring operators to provide
    smooth, easy, one-hand operation, regardless of size
  • Automatic hold-open arm locks the cover in the open
    position to ensure safe egress
  • Overlapping cover design, full welded corners on cover and
    curb, EPDM rubber gasket, and fully insulated cover and curb
    ensure weathertightness and energy efficiency
  • Constructed with corrosion resistant materials to provide many years of trouble free, dependable service
  • Heavy gauge construction and positive latching mechanism
    maintain building security
  • Curb features the Bil-Clip® flashing system, an innovative
    method to quickly and easily secure single-ply roofing material
    to Bilco roof products
  • Available in many sizes and curb configurations to satisfy any requirement or installation

*Specify model NB-20HZ or NB-50HZ with two-point latch 

 


Now Available in Enhanced Performance Design
Our most Energy Efficient
Roof Hatch model yet!

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  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 capflashing, 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 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.
  • Performance Ratings: Complies with UL 790 Class A (burning brand test).
  • 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.

U.S. Patents  5,960,596  6,347,818