Product Description
Product Spec Sheet : 
30" x 54" ADC-NB-20HZ Steel Ship Stair Roof Hatch - MDA Approved - Bilco
The 30" x 54" ADC-NB-20HZ Steel Ship Stair Roof Hatch - MDA Approved from Access Doors Canada offers a secure and reliable solution for ship stair access, especially in hurricane zones.
Miami-Dade County-approved, the ADC-NB-20HZ can withstand extreme weather conditions with its heavy-gauge steel construction and robust design. This hatch features Type 316 stainless steel hinge pins for smooth operation and powerful compression springs that enable effortless lift-assisted opening, which is ideal for frequent use. Automatic hold-open arms further enhance convenience during operation, allowing for easy transport of tools, equipment, and materials.
The ADC-NB-20HZ boasts a sturdy, fully welded, and weather-sealed curb, ensuring it can endure any weather condition, from rain and heavy winds to even the most severe storms.
Why Should You Use the 30" x 54" ADC-NB-20HZ?
- Engineered for Hurricane Zones: The ADC-NB-20HZ is Miami-Dade County and Florida Building Commission approved, ensuring it meets the strictest safety standards for use in hurricane zones. Its heavy-gauge steel construction and robust design can withstand extreme weather conditions.
- Larger Opening for Efficient Access: The NB-20HZ features a larger standard opening than other hatches, creating an expanded entry point for safe and convenient ship stair access to rooftops.
- Effortless Entry and Secure Access: Experience smooth one-handed access with interior and exterior turn handles. Powerful compression springs and automatic locking arms always ensure effortless opening and secure closure.
- Superior Fire Resistance: NB-20HZ utilizes tamper-resistant heavy-gauge steel and boasts a Class A UL 790 rating, providing the highest level of fire protection for your rooftop.
- Simplified Installation: NB-20HZ streamlines installation with a 3-½" mounting flange, overlapping cover design, and pre-drilled holes, allowing for secure fastening to roof decks.
- Weatherproof Construction: Permanently adhered EPDM rubber gaskets create a tight seal on the NB-20HZ's cover, keeping the elements out. It offers exceptional resistance to corrosion from harsh weather conditions, including heavy rain.
- Structural Reinforcement and Energy Efficiency: The NB-20HZ provides live-load support of up to 40 lbs./sq. ft. and incorporates 1" thick fiberboard insulation within its curb, reinforced by 1" thick fiberglass within its cover, for enhanced thermal resistance and reduced energy consumption.
Product Specifications
- Measurements: 30" x 54"
- Material: Durable construction featuring a 14-gauge G-90 paint bond galvanized steel frame and door for exceptional corrosion resistance.
- Cover: Brake-formed hollow metal design incorporates 1" concealed fiberglass insulation for superior thermal and acoustic dampening. The cover features a 3" beaded, overlapping flange, fully welded at the corners for strength, and is internally reinforced to withstand heavy loads (40 lbs./sq. ft. live load).
- Curb: The 12"-high curb with integrated cap flashing ensures a watertight seal. It includes 1" fiberboard insulation for improved thermal performance and a 3-½" mounting flange with pre-drilled 7/16" holes for streamlined installation.
- Gasket: An extruded EPDM rubber gasket permanently adhered to the cover creates a secure seal.
- Hinges: Heavy-duty pintle hinges with 3/8" Type 316 stainless steel hinge pins ensure smooth operation and superior corrosion resistance.
- Latch: Choose between an enclosed two-point spring latch or interior and exterior turn handles with padlock hasps (Please contact our team to specify your preference).
- Lift-Assistance: Compression spring operators enclosed in telescopic tubes offer controlled opening. An automatic hold-open arm with grip handle release allows for ease of use.
- Finish: Industrial-grade alkyd-based red oxide primer provides a protective coating.
- Hardware: Compression spring tubes: Aluminum-engineered composite for lightweight construction with steel compression springs packed in grease for long-lasting performance. Hinges: Type 316 Stainless steel for superior corrosion resistance. Other Hardware: Zinc-plated for added durability.
At Access Doors Canada, we take pride in ensuring our customers are fully satisfied with our products. Just choose the size and customization that fits your construction needs. Connect with us to request a quote or call us at (800) 679-3405. Our team of experts is ready to answer your questions.
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