DuraVent DuraTech 5-8 - Manual (Page 6)

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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
SUPPORT REQUIREMENTS
There are two “styles” of support connection
to the chimney pipe: Dedicated dia supports,
and Universal supports shown in Fig.3, 4.
For Universal components, the spacer is
discarded for 5”-6” Dia. Table 2 details the
chimney height supported by the various
components and must be followed throughout
this instruction, this data applies to both styles.
Items in Table 2 noted N/A are not load bearing
components.
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