Roof Hatch Models
Type NB-20, NB-40, NB-50, NB-20HZ, NB-50HZ, NB-90
Standard Features and Benefits
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Miami-Dade County and Florida Building Commission approval for use in high velocity hurricane zones with large and small missile impact.*
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Engineered with compression spring operators to provide smooth, easy, one-hand operation, regardless of size
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Automatic hold-open arm locks the cover in the open position to ensure safe egress
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Overlapping cover design, full welded corners on cover and curb, EPDM rubber gasket, and fully insulated cover and curb ensure weathertightness and energy efficiency
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Constructed with corrosion resistant materials to provide many years of trouble free, dependable service
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Heavy gauge construction and positive latching mechanism maintain building security
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Curb features the Bil-Clip® flashing system, an innovative method to quickly and easily secure single-ply roofing material to Bilco roof products
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Available in many sizes and curb configurations to satisfy any requirement or installation
*Specify model NB-20HZ or NB-50HZ with two-point latch
Guide Specifications
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Material (select one):
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Steel: Cover and frame are 14 gauge (2 mm) galvannealed steel.
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Aluminum: Cover and frame are 11 gauge (2.3 mm) aluminum.
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Stainless Steel: Cover and frame are 14 gauge (2 mm) type 304 stainless steel
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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.
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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.
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Gasket: Extruded EPDM rubber gasket permanently adhered to cover.
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Hinges: Heavy-duty pintle hinges with 3/8" (9 mm) Type 316 stainless steel hinge pins.
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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)
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Lift Assistance: Compression spring operators enclosed in telescopic tubes. Automatic hold-open arm with grip handle release.
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Finish:
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Steel: Alkyd base red oxide primer.
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Aluminum: Mill Finish.
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Stainless Steel: Type 304 stainless steel with mill finish and electrochemical passivation of welds.
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Hardware:
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Steel: All hardware is zinc plated/chromate sealed.
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Aluminum: Type 316 Stainless steel hinges. All other hardware is zinc plated/chromate sealed.
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Stainless Steel: Type 316 stainless steel.
U.S. Patents 5,960,596 6,347,818
