Category B Doors - Additional Edge-Sealing System Required
Proprietary Mineral Core, Fiberglass Skin, Swinging flush door for installation in up to 90 minute locations. For use in listed (3-sided) 16-gauge welded steel frames meeting UL 63 or as per frame manufacturer’s listing(s). Field-Applied Edge-Seal System is required. Refer to the door manufacturer’s installation instructions for Edge-Seal System requirements.
| Configuration |
Maximum Size |
| Single Swing |
4'0" x 8'0" |
Standard Pair
(must have separating mullion or 4-point latching)
Standard Pair (3-point latching 90 Minutes)* Must have 5" meeting edge stile |
8'0" x 8'0" |
Limitations*
Mortise or Cylindrical Latches with maximum 5” backset/Concealed Hinges/Surface-Mounted Vertical Rod or Roller Vertical Rod Fire Exit Devices/Rim-Type Fire Exit Devices/Deadbolts/Surface Bolts/Mortised Flushbolts/Surface-Mounted Closers/Concealed Closer Arm or/Concealed closer track/Surface-Mounted Protection Plates/Viewer/Vision Lite Kit-Maximum 704 sq. in. using Firelite or other listed fire rated ceramic glass, Maximum 100 sq. in. using wired glass/Plant-Ons/3/8" Electrical Raceways/ Surface-Mounted Door Bottoms/Edge Guard Required/ Temperature Rise - <250°F at 30 Minutes
* See manufacturer’s installation instructions for additional information on Smoke and Draft Control, size restrictions, and limitations.
Testing Standards
UL-10C (Positive Pressure).
Evaluated to the following...
This category includes doors evaluated with an edge-sealing system (Category G) field-applied to the labeled frame or door. The application of the edge-sealing system does not require any machining of the frame or door. Please refer to "Category G - Edge-Sealing System" for individual manufacturer's listings.
These assemblies are eligible for use in any "Category C - Standard" frame. These doors may also be installed in frames listed in "Category C - Proprietary" in the accordance with the frame manufacturer's individual listing.
All doors listed in Category B are eligible to bear the "S" (for Smoke & Draft Control assemblies) if a listed "Category H - Smoke & Draft Control Gasket" has been applied to the assembly. Please refer to Category H for individual gasket manufacturer's listings.
All doors in this category are identified by a label or marking bearing the wording, "Listed Fire Door", a time interval, a temperature rise rating, a serial number and the Warnock Hersey Certification Mark and "UL 10C".
