Williams Brothers Corporation of America Defining Quality One Access Door at a Time

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Toll Free: 800-255-5515

WB FD-8500 Series Fire-Rated Floor Hatch

The best fire rated floor door in the industry. Proudly made in the USA, this flush fire rated floor door is perfect for any application where fire rated floor doors are required. This flush fire rated floor is built to be casted in to sit flush with the surrounding floor. A heavy duty diamond place finish makes this fire rated floor door perfect for nearly any application. The WB FD-8500 Fire Rated floor door has flush diamond plate cover for utility and general purpose applications. In subways, skyscrapers and everything in between, the WB FD incorporates the latest fire-resistant technology to protect floors above from fire below. Independently tested to NFPA 288 (ASTM E 119).

Construction Specifications:

Cover: 1/4" Aluminum diamond plate reinforced for 150 psf [732 kg/m2] live load, fitted with thermal-rated composite fire panel
Frame: Thermal-break frame with aluminum upper frame and stainless steel lower frame.
Finish: Cover and frame are mill finish aluminum. Hardware is stainless steel
Latch: Two-point slam latch
Hinge: Type 316 stainless steel
Spring Actuators: Stainless steel compression springs contained within the door assembly.
Automatic Hold-open and Closing Mechanism: Stainless steel hold-open arm to automatically hold the cover in the 90° position. Hold-open arm incorporates a mechanism to automatically close and latch the cover when heat breaks a UL-listed 165° F fusible link
Installation: Door is designed for installation in dry, interior locations only. Installation shall be in accordance with the manufacturer’s instructions
Fire Rated: Warnock Hersey tested to 2 hours rating, tested to NFPA 288 (ASTM E119)

• Special Sizes - available on request upon request

FD-8500 Fire Rated Floor Hatch

Click on CAD File icon below to access CAD drawings plus 3D and BIM models. (Note: Requires one-time registration at www.caddetails.com)

Model No. Door Size Material Shipping Wt Lbs. CAD Files
FD-8500 24 x 24 Aluminum 36
FD-8500 24 x 36 Aluminum 63
FD-8500 24 x 48 Aluminum 73
FD-8500 30 x 30 Aluminum 59
FD-8500 30 x 36 Aluminum 73
FD-8500 36 x 36 Aluminum 86
FD-8500 36 x 48 Aluminum 109
FD-8500 42 x 42 Aluminum 113
FD-8500 48 x 48 Aluminum 127

Williams Brothers Corporation
Corporate Office
1330 Progress Drive
Front Royal, Virginia 22630

Western Distribution Center
Reno Nevada 

Toll Free Phone 800 255-5515
Phone 540 636-4444
Toll Free Fax 800 822-5001
Fax 540 636-4455

Toll Free Phone 800 255-5515
Phone 540 636-4444
Toll Free Fax 800 822-5001
Fax 540 636-4455