Category A door for installation in 20-45 minute locations
Limitations*
Mortise or Cylindrical Latches with maximum 5" Backset/Surface-Mounted Closers/Viewer.
Maximum Size of Openings
20 Minute
Single Swing 4'0" wide x 8'0" high
Standard Pairs - Not Allowed
45 Minute
Single Swing 3'0" wide x 7'0" high
Standard Pairs - Not Allowed
*See manufacturer's installation instructions for additional information on Smoke and Draft Control, size restrictions, and limitations.