WB FR 850 Series

Upward Swinging Fire-Rated Access Doors for Ceilings

Sizes & Specifications

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Williams Brothers - WB FR 850 Series Upward Swinging Fire-Rated Access Door / Panel for Ceilings

Upward Swinging Fire-Rated Panel Allows Installation in Restricted Spaces!

The WB FR 850 Series Upward Swinging Fire-Rated Access Door for Ceilings is a durable, fire-rated flush access panel designed for ceiling installation in applications where fire resistance is required in a restricted space. Featuring a heavy duty, 16 gauge steel frame with an insulated 16 gauge steel door and a white baked, paintable enamel finish, door is fire-rated for 3 hours in horizontal installations.


  • Door: 16 Gauge Steel, 2 1/2″ Deep
  • Frame & Trim: 16 Gauge Steel, 1″ Wide Flange
  • Finish: White Baked Enamel, Paintable Surface
  • Latches: Standard L Handle, Operable from Both Sides
  • Lock: None
  • Hinges: Fully-concealed Hinge with Coil Spring for Dampening
  • Insulation: 2″ Thick Mineral Wool
  • Interior Latch Release: Allows Opening of Door from Inside
  • Fire-Rating: Warnock-Hersey Approved for 3 Hours (horizontal installation) – Largest Size Acceptable is 24″ x 36″
  • Applications: Ceilings Only


  • Finishes: Stainless Steel, Custom Colors
  • Custom Sizes: Available on Request


The WB FR 850 fire-rated access panel is available in a variety of sizes including 8×8, 12×12, 14×14, 16×16, 24×24 and more. In addition, custom sizes are available upon request. Door features a high-temperature, mineral wool insulation for optimal fire protection and superior sound control plus a fully-concealed hinge and an exposed flange. In addition, this self-closing and locking panel includes an automatic spring closer, L handle latch and an interior release so it can be opened from the inside. Options include stainless steel construction and custom colors.

Manufactured for The Williams Brothers Corporation of America. MADE IN VIRGINIA – USA.