18" x 18" - Fire Rated Insulated Access Door with Flange - Stainless Steel

18" wide x 18" high

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Spec Sheet

18" x 18" Fire Rated Insulated Access Door with Flange – Stainless Steel 
The BA-PFI-SS 18" x 18" Fire Rated Insulated Access Door with Flange – Stainless Steel offers a low-profile solution for integrating discreet access points into fire-rated walls and ceilings. Its exposed flange simplifies installation while maintaining a clean aesthetic. 
This model's design meets the rigorous demands of modern construction projects; this access door combines fire safety, insulation, and ease of installation in one innovative package.  
Whether you're a seasoned construction professional, an architect with an eye for detail, or a general contractor seeking top-notch solutions, the BA-PFI-SS will exceed your expectations. This model is ideal for:

  • Concealment of Electrical Panels: The BA-PFI-SS provides discreet access for electrical maintenance and troubleshooting while maintaining fire compartmentation. 
  • Plumbing Access: Enables convenient access points for plumbing lines and valves located behind fire-rated walls. 
  • Conditioned Space Inspection: The BA-PFI-SS insulation helps maintain thermal efficiency while facilitating visual inspections of building systems within fire-rated assemblies. 
  • Versatile Use: Ideal for applications in mechanical rooms, electrical closets, attics, basements, and other locations requiring fire-rated access with a clean, low-profile design.

Take a Closer Look at BA-PFI-SS 
Superior Fire Protection: The BA-PFI-SS surpasses code requirements with impressive fire ratings and mineral wool insulation, potentially minimizing property damage and safeguarding occupants. 
Effortless Installation: The exposed flange simplifies integration into fire-rated assemblies for the BA-PFI-SS, saving you time and labour on-site.

Clean & Germ-Free Aesthetic: BA-PFI-SS ensures a seamless look with stainless-steel construction, eliminating unsightly gaps and promoting hygiene.

Durable Performance: Built to last, the BA-PFI-SS boasts long-lasting galvanized steel construction.

Peace of Mind with Functionality: The BA-PFI-SS prioritizes fire safety with a spring-loaded closer while facilitating easy access for maintenance. This model reduces long-term costs through early detection and streamlined repairs.


  • Dimensions: 18" x 18"
  • Material: 20-gauge stainless steel door and 16-gauge stainless steel frame
  • Hinge: Continuous piano hinge
  • Locking Mechanism: Self-latching tool-key operated slam and ring-operated slam latch; both included 
    Please consult spec sheet for lock, latch, and handle options 
  • Flange: 1" exposed flanges of cold rolled steel
  • Frame: 2-½" in depth made of cold rolled steel
  • Insulation: 2" thick fire-rated mineral wool 
  • Inside Panel Release: Available on all models over 18" x 18" 
  • Rough Opening: Door sizes + ¼" + 6 mm
  • Finish: Type 304 stainless steel
  • Packaging: Individually wrapped, 1 door per box
  • Vertical wall assemblies

Fire rated access doors, for vertical use, are subject to the following:

  •  Certification

UL 10B (2009), NFPA 252 (2012), CAN/ULC S104 (R1985), CAN/ULC S104 (2010).

  •  Rating Achieved

3 hours, neutral/negative pressure

  •  Maximum size

48" x 48" (1219mm x 1219mm), maximum area of 2304 in², tolerance on height and width limitation is more or less 3" (76mm) as long as the area does not exceed 2304 in².

  •  Temperature rise

250°F (121°C) after 30 minutes and 450°F (232°C) after 60 minutes.

Fire rated access doors, for horizontal use, are subject to the following:

  •  Horizontal ceiling assemblies

Fire rated access doors, for horizontal use, are subject to the following:

  •  Certification

ASTM E119 (2012), CAN/ULC S101 (2007)

  •  Rating Achieved

3 hours in non-combustible construction and 1 hour in combustible construction

  •  Maximum size

24"X36" (610 mm X 914 mm) (hinges and latches on the side of 36"), tolerance on dimension limitations are more or less 3" (76 mm) as long as the area does not exceed 864 in².

  •  Temperature rise

Within allowable per ASTM E119 and CAN/ULC S101

Reduce costs, streamline workflow, and ensure superior fire safety – choose the BA-PFI-SS 18" x 18" Fire Rated Insulated Access Door with Flange – Stainless Steel for your next project. 

Get the Support You Deserve 
With decades of service at Best Access Doors, we pride ourselves on our commitment to going the extra mile for our customers. Count on our blog for frequent industry updates, wellness tips, tutorials, and much more! 

Connect with our world-class team at (800) 483-0823 for product enquiries, custom requests, large orders, and everything in between!

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