Pressed Steel Cased Opening Door Frame with applied stops or Single Rabbet Frames (16 gauge or Heavier) (Welded Up) for installation singly or in pairs, including double egress pairs, in up to 3 hour locations in masonry openings and 90 minutes in steel/wood stud drywall openings.
Limitations: Doors must be labeled Positive Pressure Fire Rated Doors. Where a Positive Pressure Fire Rating is not required, frame may be used with Negative/Neutral Pressure fire rated doors. Minimum Wall Thickness: 4-7/8".
| Rating |
Maximum Size |
Wall Construction |
Door Type |
| 20 Minute |
8'-0" wide x 8'-0" high |
Masonry & Drywall |
Wood & Hollow Metal |
| 45 to 90 Minute |
8'-0" wide x 8'-0" high |
Masonry & Drywall |
Wood Composite & Hollow Metal |
| 3 Hour |
8'-0" wide x 8'-0" high |
Masonry |
Hollow Metal |
Testing Standards: UBC-7-2-97/UL-10C (Positive Pressure).
Evaluated to the following...
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This category includes frames not based on ANSI-A155.1/UL-63 construction Type (such as aluminum, wood, light gauge steel, composite, etc.). These listings will reference specific door types for which each frame is qualified. All frames listed in this section may be used in positive pressure assemblies per the terms and limitations of the individual listing.
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All frames in this category are identified by a label or marking bearing the wording, "Listed Fire Door Frame", the Warnock Hersey Certification Mark, "UBC-7-2-97/UL-10C. Frames rated at less than 3 hours will have a time interval noted on the label/marking.
