DuraTech Class A Square Cathedral Ceiling Support Box 5" to 8"

The DuraTech Class A Square Cathedral Ceiling Support Box is used to support the DuraTech Class A Chimney Pipe when passing through a cathedral ceiling. The DuraTech Chimney Pipe twist-locks into the interior of the support box providing a positive connection to the chimney pipe. The support boxes are available in 11", 24" and 36" lengths to accommodate an array of ceiling pitches. The 11" box can accommodate a flat ceiling thru a 4/12 pitch, the 24" box can accommodate a 7/12 thru 13/12 roof pitch and the 36" support box can accommodate a 14/12 thru 20/12 ceiling pitch. An adjustable 2" wide ceiling trim collar is included with each box to provide a finished look in the living space. Use the DuraTech Single Wall Snap Lock Adapter with Trim to connect the ceiling support box to a single wall stove pipe. All sizes of the support boxes will fit between standard 16" on center ceiling joists. Measurement Chart: DuraTech Class A Square Cathedral Ceiling Support Box 5" to 8" Size 5" 6" 7" 8" A 5.25" 6.25" 7.25" 8.25" B 9" 9" 11" 11" C 11" 12" 13" 14.25"