Dunbarton 60 Minute Borrowed Light Frame Assembly
Company: Dunbarton Corporation
Steel Borrowed Lite Frame (20 gauge) (Knock-Down) for installation in 1 hour locations in steel/wood stud drywall or masonry openings.
Limitations: Steel or solid wood casing trim permitted.
Maximum Sizes
9'0" wide x 3'0" high
Minimum Wall Thickness: 3-1/2"
Evaluated to the following:
Unless otherwise noted, assemblies in this section have been tested to the following standards:
UBC 7-4 (1997) Fire Test of Window Assemblies
NFPA 257 (2000)
UL 9 (1998)
and are installed, unless otherwise noted, in accordance with the following:
NFPA-80, Fire Doors & Windows.
Manufacturer's Instructions.
Listed maximum sizes of lights are based on sizes tested and may exceed local code requirements.
All frames are identified by either a label or embossed marking bearing the wording "Listed (Product)" and the WHI Certification Mark. Frames rated for less than 3 hours also bear the time interval. Frame labels that do not include a time interval are rated for 3 hours.
