Instruction

6
rating of not less than one hour when such
chimneys are located in a building less than
4 stories in height, and not less than 2 hours
when such chimneys are located in a building
more than 4 stories in height.” In Canada,
except in single-family and two-family dwellings,
chimneys which extend through another story
must have an enclosure with a re resistance
rating equal to or greater than that of the oor or
roof assembly through which they pass.
Cold Climates: In cold climates, chimneys
mounted on an outside wall should be
enclosed in a chase. Exterior chases reduce
condensation and creosote formation, and
enhance draft. Include an access door by the
Tee Cap for chimney cleaning (Fig.26,27).
TABLE 1: Framing Dimensions
Chimney Diameter
5” 6” 7” 8”
CATHEDRAL CEILING
SUPPORT BOX
11-1/4” 12-1/4” 13-1/4” 14-1/2”
FLAT CEILING
SUPPORT BOX
11-1/4” 12-1/4” 13-1/4” 14-1/2”
ROUND CEILING
SUPPORT BOX
11-1/4” 12-1/4” 13-1/4” 14-1/4”
FIRESTOP RADIATION
SHIELD
11-1/4” 12-1/4” 13-1/4” 14-1/4”
WALL THIMBLE 11-1/4” 12-1/4” 13-1/4” 14-1/4”
CAS CEILING
SUPPORT
NA 12-1/4” NA 14-1/2”
CAS WALL THIMBLE NA 12-1/4” NA 14-1/4”
REDUCED
CLEARANCE
SUPPORT BOX
NA 10-1/4” NA NA
TABLE 2: Chimney Support
DURATECH SUPPORT COMPONENT
CHIMNEY HEIGHT
SUPPORTED 5”-8” DIA
ADJUSTABLE ELBOW STRAP EA ELBOW/PIPE
ADJUSTABLE WALL STRAP N/A - USE EVERY 8’ MIN
SUPPORT BOX (SQUARE OR
ROUND)
60-FT
TEE SUPPORT 60-FT
EXTENDED ROOF BRACKET N/A
EXTENDED WALL SUPPORT 20-FT
RE-SUPPORT 20-FT
ROOF SUPPORT 30’ TOTAL, 10’ ABOVE
5” AND 6” DIA 7” AND 8” DIA
Figure 3
SPACER
UNIVERSAL
SUPPORT
BAND
UNIVERSAL
RE-SUPPORT
UNIVERSAL
EXTENDED
WALL SUPPORT
Figure 4
SUPPORT REQUIREMENTS
There are two “styles” of support connection
to the chimney pipe: Dedicated dia supports,
and Universal supports shown in Fig.3 and
4. For Universal components, the spacer is
discarded for 5”-6” Dia. Table 2 details the