DuraTech Class A Square Cathedral Ceiling Support Box 5" to 8"
Product Images
Product Details
Help & Documents
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:

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" |
Product Details:
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:

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" |
Help & Documents:
DIY Center
(AKA ‘The Rockford Files’)
From video tutorials to product walkthroughs, we have a variety of DIY resources just for you! Click the button below to view our entire library.

Our 316Ti flexible chimney liner and chimney liner components have passed the rigorous testing at the Underwriters Laboratories with best in class status and are UL Listed. So if you are looking for UL listed chimney liner sold directly to homeowners, then look no further than Rockford Chimney