30" x 54" Ship Stair Access Roof Hatch - Steel Curb & Aluminum Cover - Bilco

NB-40 30" x 54" Ship Stair Access Roof Hatch - Steel Curb & Aluminum Cover - Bilco

The NB-40 Ship Stair Access Roof Hatch - Steel Curb & Aluminum Cover possesses durable red primed steel material and an anti-corrosive aluminum with a single door that allows easy, convenient, and secure access for persons, tools, and equipment via a stairway. This roof hatch has excellent weather resistance with its fully gasketed and insulated construction.  

Why install the NB-40?        

Affordable: The NB-40 roof hatch also provides a cost-effective solution to address your roof hatch needs for your commercial building. In addition, this product is easy to install without special tools and requires no maintenance.      

Super-Durability: This roof hatch is tough and long-lasting with its combination of steel and aluminum material. And no need to worry about dents and corrosion with its 14 gauge red primed steel and 11 gauge mill finish aluminum.   

Variety: If you are looking for multiple product options, you can choose from NB-20's various sizes and options that will surely fit your commercial building.     

Specifications:      

• Cover: 11 gauge (2.3 mm) Mill Finish Aluminum.  
• Frame and Base: 14 gauge Red Primered Steel.  
• Cover: Brake formed, hollow-metal design with 1 inch (25 mm) concealed fiberglass insulation, 3 inches (76 mm) beaded, overlapping flange, fully welded at corners, and internally reinforced for 40 psf (195 kg/m2) live load  
• Curb: 12 inches (305 mm) in height with integral cap flashing, 1 inch (25 mm) fiberboard insulation, fully welded at corners, and 3-1/2 inch (89 mm) mounting flange with 7/16 inch 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 inch (9 mm) Type 316 stainless steel hinge pins  
• Latch: Slam latch with the interior, exterior turn handles, and padlock hasps.  
• Lift Assistance: Compression spring operators enclosed in telescopic tubes. Automatic hold-open arm with grip handle release  
• Hardware: Engineered composite compression spring tubes with steel compression springs packed in grease. All other hardware is zinc-plated    

Call Us Today!     

Why Choose Access Doors and Panels? Because we are your reliable source of practical and handy access panels for your walls, ceilings, floors, and even your roofing system. We understand your access and security needs, so you can always talk to our expert product specialists and apply for credit! Call us at (800)-609-2917 and experience our excellent products and services! 

Product Spec Sheet:
Door Size:	36" wide x 30" high
Material:	Galvanized Steel