30" x 54" Ship Stair Access Roof Hatch - Aluminum - Bilco

30" x 54" NB-50 Ship Stair Aluminum Access Roof Hatch – Bilco

Getting to the roof safely and easily can be challenging, especially when carrying tools or equipment. Climbing a ladder to access a standard roof hatch isn’t always the safest or most convenient option. Plus, harsh weather can wear down access points, leading to leaks and security concerns.

The NB-50 30" x 54" Ship Stair Aluminum Access Roof Hatch offers a safer, more convenient solution. Its ship stair design provides a more natural and stable way to climb, while the smooth, one-hand operation ensures effortless use.

Built from durable, weather-resistant aluminum with a secure latch, it protects buildings while making rooftop work more convenient.

Why Should You Use the 30" x 54" NB-50?

• Safe & Easy Access: The ship stair design allows for a more stable climb, making it safer and more convenient than vertical ladders.
• Durable & Weather-Resistant: Its heavy-gauge aluminum construction with a fully insulated cover and curb ensures long-lasting performance in any climate.
• Smooth, One-Hand Operation: The NB-50’s compression spring operators make opening and closing effortless, even with frequent use.
• Secure & Energy-Efficient: A positive latching mechanism keeps the building secure, while the insulated design helps maintain energy efficiency.
• Hurricane-Ready: Approved for high-velocity hurricane zones, making it a reliable choice for settings prone to extreme weather.

Want to learn more about proper installation? Check out our blog " What Are the Installation Requirements for Access Doors and Roof Hatches in Commercial Buildings?" for expert insights and helpful tips!

Product Specifications

• Model: NB-50 30” x 54” Ship Stair Aluminum Access Roof Hatch
• Dimensions: 30” x 54” (762mm x 1372mm)
• Material: 11-gauge (2.3mm) aluminum cover and frame
• Cover Design: Hollow-metal with 1" (25mm) concealed fiberglass insulation, fully welded corners, and a 3" (76mm) beaded overlapping flange
• Curb Height: 12" (305mm) with integral cap flashing and 1" (25mm) fiberboard insulation
• Mounting Flange: 3-1/2" (89mm) with 7/16" (11mm) pre-drilled holes for secure installation
• Gasket: Extruded EPDM rubber, permanently adhered to the cover for a weathertight seal
• Hinges: Heavy-duty pintle hinges with 3/8" (9mm) Type 316 stainless steel hinge pins
• Latch: Slam latch with interior and exterior turn handles and padlock hasps (Two-point latch available for high-velocity hurricane zone models)
• Lift Assistance: Compression spring operators are enclosed in telescopic tubes for smooth operation
• Hold-Open Arm: Automatic hold-open arm with grip handle release for safe egress
• Finish: Mill finish aluminum
• Hardware: Type 316 stainless steel hinges; all other hardware is zinc plated and chromate sealed
• Live Load Capacity: Internally reinforced to support 40 psf (195 kg/m²)

Installation Instructions

1. Prepare for Installation: Keep the steel strapping until the unit is in position to prevent sudden movement from the spring-loaded cover.
2. Position the Hatch: Place the automatic hold-open arm and red vinyl grip at the top of the stairway or on the side opposite the ladder for easy access.
3. Secure to the Roof: Ensure the frame is level, then fasten the base flange to the roof deck using the pre-drilled 7/16" (11mm) holes with appropriate fasteners.
4. Complete Roofing & Sealing: Use the Bil-Clip® flashing system for single-ply roofing or a cant block for built-up roofing to ensure a secure, weathertight seal.

No more struggling with unsafe roof access—upgrade to the NB-50 30" x 54" Ship Stair Aluminum Roof Hatch for a secure and effortless entry. Choose a roof access hatch that offers safety, durability, and easy access whenever needed.

Access Doors and Panels is your trusted source for high-quality access solutions for walls, ceilings, floors, and roofs. Call (800) 609-2917 to talk to our product specialists about your access and security needs, or apply for credit today!