Williams Brothers Corporation of America
Building Products Listing Program
- Williams Brothers Corporation of America
- Fire Doors
- Front Royal, Virginia, USA
- F500-1
- F500-1, Edition 2
- March 31, 2025
- October 14, 2025
- N/A
-
UL 10B (2020)
“Standard for Fire Tests of Door Assemblies”.CAN/ULC S104-15
“Standard Method for Fire Tests of Door Assemblies.”ASTM E119-24
“Standard Test Methods for Fire Tests of Building Construction and Materials.”CAN/ULC S101-14
“Standard Methods of Fire Endurance Tests of Building Construction Materials”. -
Williams Brothers Fire-Resistance Rated Access Doors
-
Williams Brothers FR 800 Insulated Steel Access Door and Frame installed in fire-resistance rated wall assemblies evaluated to CAN/ULC S104 and UL 10B:
Model Name
Fire-Resistance Rating
Maximum Size
Frame
Door
FR 800
(Vertical)
90-Minutes
48 in. x 48 in.
(1219 mm x 1219 mm)
16-Gauge Steel
2-5/8 in. (67 mm)
Depth Frame
18-Gauge Steel
2 in. (51 mm)
Depth Access Door
Williams Brothers FR 800 Insulated Steel Access Door and Frame Installed in fire-resistance rated load-bearing floor / ceiling assemblies evaluated to CAN/ULC S101 and ASTM E119:
Component
Description
Assembly
Type:
Wood joist, gypsum and plywood
Fire-Resistance Rating:
60-Minutes
Access Door
Manufacturer:
Williams Brothers Corporation of America
Model:
FR 800 (Horizontal)
Frame:
16-Gauge Steel
2-5/8 in. (67 mm) Depth
Door:
18-Gauge Steel
2 in. (51 mm) Depth
Maximum Size:
36 in. x 36 in. (914 mm x 914 mm)
Framing
Type:
Nominal 2 in. x 8 in. (38 mm x 184 mm) dimensional wood joists, minimum specific gravity (SG) of 0.42, spaced 24 in. (610 mm) OC
Weather Stripping
Gasket
(optional)
Manufacturer:
Assa Abloy
Model:
PEMKO Hot Smoke Seal™ HSS1000
Description:
Self-adhered intumescent edge seal, classified as Category G, 5/64 in. (2 mm) x 7/16 in. (11.1 mm). For use as weather stripping gasket only.
Ceiling
Gypsum Board
Type:
Two layers of 1/2 in. (12.5 mm) Type X gypsum board, compliant to ASTM C1396 and listed by a recognized agency.
Fasteners:
Gypsum board is to be fastened to joists with #6 x 1-1/4 in. (32 mm) self-drilling drywall screws spaced at 8 in. (204 mm) on center.
Joints:
Joints in gypsum board to be taped and mudded in accordance with industry standards.
Sub-Floor
Type:
One layer of 3/4 in. (20 mm) plywood attached in accordance with applicable code.
Opening
Type:
One layer of 5/8 in. (16 mm) Type X gypsum board around the perimeter of the opening.
Fasteners:
Gypsum Board fastened to wood framing with #6 x 1-1/4 in. (32 mm) self-drilling drywall screws spaced at 8 in. (204 mm) on center.
Installation
Description:
Inside edge of framing around the opening fully covered with 5/8 in. (16 mm) Type X gypsum board. The door frame is screwed into the wood stud framing of the wall through mounting holes using #10 x 2 in. (51 mm) wood screws.
Williams Brothers DW 405 Phantom Access Door and Frame installed in load-bearing fire-resistance rated floor / ceiling assemblies evaluated to CAN/ULC S101 and ASTM E119:
Component
Description
Assembly Type
Type:
Steel joist, gypsum and plywood.
Fire-Resistance Rating:
45-Minutes
Access Door
Manufacturer:
Williams Brothers Corporation of America
Model:
DW 405 Phantom (Horizontal)
Frame:
Type X gypsum
Door:
Type X gypsum
Maximum Size:
22 in. x 30 in. (559 mm x 762 mm)
Framing
Type:
3-5/8 in. x 1-1/4 in. (92 mm x 32 mm) steel joist support framing for the door and gypsum board spaced 24 in. (610 mm) OC.
Ceiling
Gypsum Board
Type:
One layer of 5/8 in. (16 mm) Type X gypsum board, compliant to ASTM C1396 and listed by a recognized agency.
Fasteners:
Gypsum board is to be fastened to joists with #6 x 1-1/4 in. (32 mm) self-drilling drywall screws spaced at 8 in. (204 mm) on center.
Joints:
Joints in gypsum board to be taped and mudded in accordance with industry standards.
Sub-Floor
Type:
One layer of 3/4 in. (20 mm) plywood attached in accordance with applicable code.
Installation
Description:
Frame mounted to the steel framing with #6 x 1-1/4 in. (32 mm) self-drilling drywall screws spaced every 3 in. (76 mm). The door is manually placed on the frame edges to ensure uniform bearing coverage with no gaps between the door and frame into the floor / ceiling cavity space
Notes:
· Refer to QAI evaluation reports F500 and the applicable test reports for test assembly configurations used for fire endurance testing.
· Refer to the QAI FD002 – Fire Door Guidelines for general guidelines of fire door assemblies
· Final acceptance of the product in the intended application is to be determined by the authority having jurisdiction (AHJ).
· Product is to be installed in accordance with the manufacturer’s published installation instructions by qualified personnel.
The materials, products or systems listed in this directory have been qualified to bear the QAI Listing Mark under the conditions stated with each Listing. Only those products bearing the QAI Listing Mark are considered to be listed by QAI.
The standard herein listed is the currently accepted version within the relevant certification scheme, code or other requirements unless otherwise noted. Transition periods may apply. Upon request, QAI will provide information about the validity of any of its certifications.
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